[
  {
    "slug": "hydrogen",
    "name": "Hydrogen",
    "category": "Gas",
    "densityKgM3": 0.0899,
    "note": "Dry gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "helium",
    "name": "Helium",
    "category": "Gas",
    "densityKgM3": 0.1786,
    "note": "Dry gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "air",
    "name": "Air",
    "category": "Gas",
    "densityKgM3": 1.225,
    "note": "Dry air at sea level",
    "source": "Representative reference value"
  },
  {
    "slug": "carbon-dioxide",
    "name": "Carbon dioxide",
    "category": "Gas",
    "densityKgM3": 1.977,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "methane",
    "name": "Methane",
    "category": "Gas",
    "densityKgM3": 0.656,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "oxygen",
    "name": "Oxygen",
    "category": "Gas",
    "densityKgM3": 1.429,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "nitrogen",
    "name": "Nitrogen",
    "category": "Gas",
    "densityKgM3": 1.251,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "water",
    "name": "Water",
    "category": "Liquid",
    "densityKgM3": 997,
    "note": "Fresh water near room temperature",
    "source": "Representative reference value"
  },
  {
    "slug": "sea-water",
    "name": "Sea water",
    "category": "Liquid",
    "densityKgM3": 1025,
    "note": "Average salinity",
    "source": "Representative reference value"
  },
  {
    "slug": "ethanol",
    "name": "Ethanol",
    "category": "Liquid",
    "densityKgM3": 789,
    "note": "Pure ethanol at 20°C",
    "source": "Representative reference value"
  },
  {
    "slug": "gasoline",
    "name": "Gasoline",
    "category": "Liquid",
    "densityKgM3": 740,
    "note": "Typical range midpoint",
    "source": "Representative reference value"
  },
  {
    "slug": "diesel",
    "name": "Diesel",
    "category": "Liquid",
    "densityKgM3": 832,
    "note": "Typical automotive diesel",
    "source": "Representative reference value"
  },
  {
    "slug": "milk",
    "name": "Milk",
    "category": "Liquid",
    "densityKgM3": 1035,
    "note": "Whole milk",
    "source": "Representative reference value"
  },
  {
    "slug": "olive-oil",
    "name": "Olive oil",
    "category": "Liquid",
    "densityKgM3": 918,
    "note": "At room temperature",
    "source": "Representative reference value"
  },
  {
    "slug": "glycerin",
    "name": "Glycerin",
    "category": "Liquid",
    "densityKgM3": 1260,
    "note": "Pure glycerol",
    "source": "Representative reference value"
  },
  {
    "slug": "mercury",
    "name": "Mercury",
    "category": "Liquid",
    "densityKgM3": 13534,
    "note": "Liquid metal at room temperature",
    "source": "Representative reference value"
  },
  {
    "slug": "ice",
    "name": "Ice",
    "category": "Food",
    "densityKgM3": 917,
    "note": "Explains why ice floats",
    "source": "Representative reference value"
  },
  {
    "slug": "honey",
    "name": "Honey",
    "category": "Food",
    "densityKgM3": 1420,
    "note": "Moisture dependent",
    "source": "Representative reference value"
  },
  {
    "slug": "sugar",
    "name": "Granulated sugar",
    "category": "Food",
    "densityKgM3": 845,
    "note": "Bulk density, not crystal density",
    "source": "Representative reference value"
  },
  {
    "slug": "flour",
    "name": "Flour",
    "category": "Food",
    "densityKgM3": 593,
    "note": "Loose packed",
    "source": "Representative reference value"
  },
  {
    "slug": "salt",
    "name": "Table salt",
    "category": "Food",
    "densityKgM3": 1217,
    "note": "Bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "oak",
    "name": "Oak",
    "category": "Wood",
    "densityKgM3": 750,
    "note": "Air-dried hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "pine",
    "name": "Pine",
    "category": "Wood",
    "densityKgM3": 500,
    "note": "Softwood average",
    "source": "Representative reference value"
  },
  {
    "slug": "balsa",
    "name": "Balsa",
    "category": "Wood",
    "densityKgM3": 160,
    "note": "Lightweight wood",
    "source": "Representative reference value"
  },
  {
    "slug": "mahogany",
    "name": "Mahogany",
    "category": "Wood",
    "densityKgM3": 600,
    "note": "Air-dried",
    "source": "Representative reference value"
  },
  {
    "slug": "maple",
    "name": "Maple",
    "category": "Wood",
    "densityKgM3": 705,
    "note": "Hard maple average",
    "source": "Representative reference value"
  },
  {
    "slug": "birch",
    "name": "Birch",
    "category": "Wood",
    "densityKgM3": 670,
    "note": "Air-dried",
    "source": "Representative reference value"
  },
  {
    "slug": "acrylic",
    "name": "Acrylic",
    "category": "Plastic",
    "densityKgM3": 1180,
    "note": "PMMA sheet",
    "source": "Representative reference value"
  },
  {
    "slug": "hdpe",
    "name": "HDPE",
    "category": "Plastic",
    "densityKgM3": 950,
    "note": "High-density polyethylene",
    "source": "Representative reference value"
  },
  {
    "slug": "ldpe",
    "name": "LDPE",
    "category": "Plastic",
    "densityKgM3": 920,
    "note": "Low-density polyethylene",
    "source": "Representative reference value"
  },
  {
    "slug": "nylon",
    "name": "Nylon",
    "category": "Plastic",
    "densityKgM3": 1150,
    "note": "PA6 average",
    "source": "Representative reference value"
  },
  {
    "slug": "pvc",
    "name": "PVC",
    "category": "Plastic",
    "densityKgM3": 1380,
    "note": "Rigid PVC",
    "source": "Representative reference value"
  },
  {
    "slug": "ptfe",
    "name": "PTFE",
    "category": "Plastic",
    "densityKgM3": 2200,
    "note": "Teflon",
    "source": "Representative reference value"
  },
  {
    "slug": "polycarbonate",
    "name": "Polycarbonate",
    "category": "Plastic",
    "densityKgM3": 1210,
    "note": "Engineering plastic",
    "source": "Representative reference value"
  },
  {
    "slug": "aluminum",
    "name": "Aluminum",
    "category": "Metal",
    "densityKgM3": 2700,
    "note": "Pure aluminum reference",
    "source": "Representative reference value"
  },
  {
    "slug": "brass",
    "name": "Brass",
    "category": "Metal",
    "densityKgM3": 8500,
    "note": "Copper-zinc alloy",
    "source": "Representative reference value"
  },
  {
    "slug": "bronze",
    "name": "Bronze",
    "category": "Metal",
    "densityKgM3": 8800,
    "note": "Copper-tin alloy",
    "source": "Representative reference value"
  },
  {
    "slug": "cast-iron",
    "name": "Cast iron",
    "category": "Metal",
    "densityKgM3": 7200,
    "note": "Varies by grade",
    "source": "Representative reference value"
  },
  {
    "slug": "copper",
    "name": "Copper",
    "category": "Metal",
    "densityKgM3": 8960,
    "note": "Pure copper",
    "source": "Representative reference value"
  },
  {
    "slug": "gold",
    "name": "Gold",
    "category": "Metal",
    "densityKgM3": 19320,
    "note": "Pure gold",
    "source": "Representative reference value"
  },
  {
    "slug": "iron",
    "name": "Iron",
    "category": "Metal",
    "densityKgM3": 7870,
    "note": "Pure iron",
    "source": "Representative reference value"
  },
  {
    "slug": "lead",
    "name": "Lead",
    "category": "Metal",
    "densityKgM3": 11340,
    "note": "Pure lead",
    "source": "Representative reference value"
  },
  {
    "slug": "magnesium",
    "name": "Magnesium",
    "category": "Metal",
    "densityKgM3": 1740,
    "note": "Light structural metal",
    "source": "Representative reference value"
  },
  {
    "slug": "nickel",
    "name": "Nickel",
    "category": "Metal",
    "densityKgM3": 8908,
    "note": "Pure nickel",
    "source": "Representative reference value"
  },
  {
    "slug": "silver",
    "name": "Silver",
    "category": "Metal",
    "densityKgM3": 10490,
    "note": "Pure silver",
    "source": "Representative reference value"
  },
  {
    "slug": "steel",
    "name": "Steel",
    "category": "Metal",
    "densityKgM3": 7850,
    "note": "Carbon steel average",
    "source": "Representative reference value"
  },
  {
    "slug": "stainless-steel",
    "name": "Stainless steel",
    "category": "Metal",
    "densityKgM3": 8000,
    "note": "Austenitic average",
    "source": "Representative reference value"
  },
  {
    "slug": "titanium",
    "name": "Titanium",
    "category": "Metal",
    "densityKgM3": 4500,
    "note": "Pure titanium reference",
    "source": "Representative reference value"
  },
  {
    "slug": "tungsten",
    "name": "Tungsten",
    "category": "Metal",
    "densityKgM3": 19250,
    "note": "Heavy refractory metal",
    "source": "Representative reference value"
  },
  {
    "slug": "zinc",
    "name": "Zinc",
    "category": "Metal",
    "densityKgM3": 7140,
    "note": "Pure zinc",
    "source": "Representative reference value"
  },
  {
    "slug": "osmium",
    "name": "Osmium",
    "category": "Metal",
    "densityKgM3": 22590,
    "note": "Among the densest elements",
    "source": "Representative reference value"
  },
  {
    "slug": "granite",
    "name": "Granite",
    "category": "Stone",
    "densityKgM3": 2750,
    "note": "Dimension stone average",
    "source": "Representative reference value"
  },
  {
    "slug": "limestone",
    "name": "Limestone",
    "category": "Stone",
    "densityKgM3": 2600,
    "note": "Sedimentary rock average",
    "source": "Representative reference value"
  },
  {
    "slug": "marble",
    "name": "Marble",
    "category": "Stone",
    "densityKgM3": 2710,
    "note": "Metamorphic stone average",
    "source": "Representative reference value"
  },
  {
    "slug": "sandstone",
    "name": "Sandstone",
    "category": "Stone",
    "densityKgM3": 2320,
    "note": "Dry rock average",
    "source": "Representative reference value"
  },
  {
    "slug": "basalt",
    "name": "Basalt",
    "category": "Stone",
    "densityKgM3": 3000,
    "note": "Volcanic rock average",
    "source": "Representative reference value"
  },
  {
    "slug": "concrete",
    "name": "Concrete",
    "category": "Stone",
    "densityKgM3": 2400,
    "note": "Normal-weight concrete",
    "source": "Representative reference value"
  },
  {
    "slug": "glass",
    "name": "Glass",
    "category": "Stone",
    "densityKgM3": 2500,
    "note": "Soda-lime glass",
    "source": "Representative reference value"
  },
  {
    "slug": "brick",
    "name": "Brick",
    "category": "Stone",
    "densityKgM3": 1800,
    "note": "Fired clay brick",
    "source": "Representative reference value"
  },
  {
    "slug": "dry-soil",
    "name": "Dry soil",
    "category": "Soil",
    "densityKgM3": 1200,
    "note": "Loose dry topsoil",
    "source": "Representative reference value"
  },
  {
    "slug": "moist-soil",
    "name": "Moist soil",
    "category": "Soil",
    "densityKgM3": 1500,
    "note": "Typical field moisture",
    "source": "Representative reference value"
  },
  {
    "slug": "clay",
    "name": "Clay",
    "category": "Soil",
    "densityKgM3": 1600,
    "note": "Compacted clay average",
    "source": "Representative reference value"
  },
  {
    "slug": "sand",
    "name": "Sand",
    "category": "Soil",
    "densityKgM3": 1600,
    "note": "Dry sand bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "gravel",
    "name": "Gravel",
    "category": "Soil",
    "densityKgM3": 1680,
    "note": "Loose gravel",
    "source": "Representative reference value"
  },
  {
    "slug": "argon",
    "name": "Argon",
    "category": "Gas",
    "densityKgM3": 1.784,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "ammonia-gas",
    "name": "Ammonia",
    "category": "Gas",
    "densityKgM3": 0.73,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "neon",
    "name": "Neon",
    "category": "Gas",
    "densityKgM3": 0.9,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "propane-gas",
    "name": "Propane",
    "category": "Gas",
    "densityKgM3": 1.882,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "butane-gas",
    "name": "Butane",
    "category": "Gas",
    "densityKgM3": 2.48,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "chlorine",
    "name": "Chlorine",
    "category": "Gas",
    "densityKgM3": 3.214,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "sulfur-dioxide",
    "name": "Sulfur dioxide",
    "category": "Gas",
    "densityKgM3": 2.62,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "hydrogen-sulfide",
    "name": "Hydrogen sulfide",
    "category": "Gas",
    "densityKgM3": 1.54,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "water-vapor",
    "name": "Water vapor",
    "category": "Gas",
    "densityKgM3": 0.6,
    "note": "Representative low-density steam value",
    "source": "Representative reference value"
  },
  {
    "slug": "ozone",
    "name": "Ozone",
    "category": "Gas",
    "densityKgM3": 2.144,
    "note": "Gas at STP",
    "source": "Representative reference value"
  },
  {
    "slug": "acetone",
    "name": "Acetone",
    "category": "Liquid",
    "densityKgM3": 784,
    "note": "Pure acetone at room temperature",
    "source": "Representative reference value"
  },
  {
    "slug": "benzene",
    "name": "Benzene",
    "category": "Liquid",
    "densityKgM3": 876,
    "note": "Pure benzene at room temperature",
    "source": "Representative reference value"
  },
  {
    "slug": "kerosene",
    "name": "Kerosene",
    "category": "Liquid",
    "densityKgM3": 810,
    "note": "Typical range midpoint",
    "source": "Representative reference value"
  },
  {
    "slug": "jet-fuel",
    "name": "Jet fuel",
    "category": "Liquid",
    "densityKgM3": 804,
    "note": "Typical aviation fuel",
    "source": "Representative reference value"
  },
  {
    "slug": "vegetable-oil",
    "name": "Vegetable oil",
    "category": "Liquid",
    "densityKgM3": 920,
    "note": "Generic room-temperature value",
    "source": "Representative reference value"
  },
  {
    "slug": "canola-oil",
    "name": "Canola oil",
    "category": "Liquid",
    "densityKgM3": 920,
    "note": "Generic room-temperature value",
    "source": "Representative reference value"
  },
  {
    "slug": "coconut-oil",
    "name": "Coconut oil",
    "category": "Liquid",
    "densityKgM3": 924,
    "note": "Liquid state value",
    "source": "Representative reference value"
  },
  {
    "slug": "castor-oil",
    "name": "Castor oil",
    "category": "Liquid",
    "densityKgM3": 961,
    "note": "Pure castor oil",
    "source": "Representative reference value"
  },
  {
    "slug": "motor-oil",
    "name": "Motor oil",
    "category": "Liquid",
    "densityKgM3": 870,
    "note": "Representative lubricant oil value",
    "source": "Representative reference value"
  },
  {
    "slug": "brake-fluid",
    "name": "Brake fluid",
    "category": "Liquid",
    "densityKgM3": 1050,
    "note": "Typical glycol-based fluid",
    "source": "Representative reference value"
  },
  {
    "slug": "antifreeze",
    "name": "Antifreeze",
    "category": "Liquid",
    "densityKgM3": 1110,
    "note": "Ethylene glycol rich fluid",
    "source": "Representative reference value"
  },
  {
    "slug": "wine",
    "name": "Wine",
    "category": "Liquid",
    "densityKgM3": 990,
    "note": "Alcohol and sugar dependent",
    "source": "Representative reference value"
  },
  {
    "slug": "beer",
    "name": "Beer",
    "category": "Liquid",
    "densityKgM3": 1010,
    "note": "Approximate finished beverage value",
    "source": "Representative reference value"
  },
  {
    "slug": "orange-juice",
    "name": "Orange juice",
    "category": "Liquid",
    "densityKgM3": 1045,
    "note": "Representative packaged juice value",
    "source": "Representative reference value"
  },
  {
    "slug": "apple-juice",
    "name": "Apple juice",
    "category": "Liquid",
    "densityKgM3": 1048,
    "note": "Representative packaged juice value",
    "source": "Representative reference value"
  },
  {
    "slug": "corn-syrup-liquid",
    "name": "Corn syrup",
    "category": "Liquid",
    "densityKgM3": 1380,
    "note": "High-sugar syrup",
    "source": "Representative reference value"
  },
  {
    "slug": "blood",
    "name": "Blood",
    "category": "Liquid",
    "densityKgM3": 1060,
    "note": "Whole blood average",
    "source": "Representative reference value"
  },
  {
    "slug": "brine",
    "name": "Brine",
    "category": "Liquid",
    "densityKgM3": 1200,
    "note": "Highly saline water",
    "source": "Representative reference value"
  },
  {
    "slug": "liquid-ammonia",
    "name": "Liquid ammonia",
    "category": "Liquid",
    "densityKgM3": 682,
    "note": "Condensed ammonia",
    "source": "Representative reference value"
  },
  {
    "slug": "liquid-oxygen",
    "name": "Liquid oxygen",
    "category": "Liquid",
    "densityKgM3": 1141,
    "note": "Cryogenic liquid",
    "source": "Representative reference value"
  },
  {
    "slug": "liquid-nitrogen",
    "name": "Liquid nitrogen",
    "category": "Liquid",
    "densityKgM3": 808,
    "note": "Cryogenic liquid",
    "source": "Representative reference value"
  },
  {
    "slug": "liquid-propane",
    "name": "Liquid propane",
    "category": "Liquid",
    "densityKgM3": 493,
    "note": "Condensed propane",
    "source": "Representative reference value"
  },
  {
    "slug": "liquid-butane",
    "name": "Liquid butane",
    "category": "Liquid",
    "densityKgM3": 584,
    "note": "Condensed butane",
    "source": "Representative reference value"
  },
  {
    "slug": "diesel-exhaust-fluid",
    "name": "Diesel exhaust fluid",
    "category": "Liquid",
    "densityKgM3": 1090,
    "note": "Urea-water solution",
    "source": "Representative reference value"
  },
  {
    "slug": "vinegar-liquid",
    "name": "Vinegar",
    "category": "Liquid",
    "densityKgM3": 1010,
    "note": "Dilute acetic acid solution",
    "source": "Representative reference value"
  },
  {
    "slug": "soy-sauce-liquid",
    "name": "Soy sauce",
    "category": "Liquid",
    "densityKgM3": 1180,
    "note": "Salt-rich condiment",
    "source": "Representative reference value"
  },
  {
    "slug": "maple-syrup-liquid",
    "name": "Maple syrup",
    "category": "Liquid",
    "densityKgM3": 1330,
    "note": "Concentrated sugar solution",
    "source": "Representative reference value"
  },
  {
    "slug": "cedar",
    "name": "Cedar",
    "category": "Wood",
    "densityKgM3": 380,
    "note": "Light aromatic softwood",
    "source": "Representative reference value"
  },
  {
    "slug": "spruce",
    "name": "Spruce",
    "category": "Wood",
    "densityKgM3": 450,
    "note": "Structural softwood average",
    "source": "Representative reference value"
  },
  {
    "slug": "fir",
    "name": "Fir",
    "category": "Wood",
    "densityKgM3": 530,
    "note": "Representative Douglas fir value",
    "source": "Representative reference value"
  },
  {
    "slug": "teak",
    "name": "Teak",
    "category": "Wood",
    "densityKgM3": 650,
    "note": "Durable tropical hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "walnut",
    "name": "Walnut",
    "category": "Wood",
    "densityKgM3": 610,
    "note": "Air-dried hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "ash",
    "name": "Ash",
    "category": "Wood",
    "densityKgM3": 670,
    "note": "Air-dried hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "cherry",
    "name": "Cherry",
    "category": "Wood",
    "densityKgM3": 580,
    "note": "Furniture hardwood average",
    "source": "Representative reference value"
  },
  {
    "slug": "beech",
    "name": "Beech",
    "category": "Wood",
    "densityKgM3": 720,
    "note": "Hardwood average",
    "source": "Representative reference value"
  },
  {
    "slug": "elm",
    "name": "Elm",
    "category": "Wood",
    "densityKgM3": 560,
    "note": "Air-dried hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "hickory",
    "name": "Hickory",
    "category": "Wood",
    "densityKgM3": 830,
    "note": "Dense shock-resistant hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "larch",
    "name": "Larch",
    "category": "Wood",
    "densityKgM3": 590,
    "note": "Conifer average",
    "source": "Representative reference value"
  },
  {
    "slug": "poplar",
    "name": "Poplar",
    "category": "Wood",
    "densityKgM3": 410,
    "note": "Light hardwood average",
    "source": "Representative reference value"
  },
  {
    "slug": "redwood",
    "name": "Redwood",
    "category": "Wood",
    "densityKgM3": 450,
    "note": "Softwood average",
    "source": "Representative reference value"
  },
  {
    "slug": "ebony",
    "name": "Ebony",
    "category": "Wood",
    "densityKgM3": 1100,
    "note": "Very dense hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "ipe",
    "name": "Ipe",
    "category": "Wood",
    "densityKgM3": 1050,
    "note": "Dense tropical hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "acacia",
    "name": "Acacia",
    "category": "Wood",
    "densityKgM3": 750,
    "note": "Air-dried hardwood",
    "source": "Representative reference value"
  },
  {
    "slug": "bamboo",
    "name": "Bamboo",
    "category": "Wood",
    "densityKgM3": 700,
    "note": "Engineered bamboo average",
    "source": "Representative reference value"
  },
  {
    "slug": "plywood",
    "name": "Plywood",
    "category": "Wood",
    "densityKgM3": 600,
    "note": "General structural panel value",
    "source": "Representative reference value"
  },
  {
    "slug": "mdf",
    "name": "MDF",
    "category": "Wood",
    "densityKgM3": 750,
    "note": "Medium-density fiberboard",
    "source": "Representative reference value"
  },
  {
    "slug": "particleboard",
    "name": "Particleboard",
    "category": "Wood",
    "densityKgM3": 690,
    "note": "Composite wood panel",
    "source": "Representative reference value"
  },
  {
    "slug": "abs",
    "name": "ABS",
    "category": "Plastic",
    "densityKgM3": 1040,
    "note": "Acrylonitrile butadiene styrene",
    "source": "Representative reference value"
  },
  {
    "slug": "polypropylene",
    "name": "Polypropylene",
    "category": "Plastic",
    "densityKgM3": 905,
    "note": "PP average",
    "source": "Representative reference value"
  },
  {
    "slug": "pet",
    "name": "PET",
    "category": "Plastic",
    "densityKgM3": 1380,
    "note": "Polyethylene terephthalate",
    "source": "Representative reference value"
  },
  {
    "slug": "petg",
    "name": "PETG",
    "category": "Plastic",
    "densityKgM3": 1270,
    "note": "Modified PET polymer",
    "source": "Representative reference value"
  },
  {
    "slug": "polystyrene",
    "name": "Polystyrene",
    "category": "Plastic",
    "densityKgM3": 1050,
    "note": "Solid GPPS average",
    "source": "Representative reference value"
  },
  {
    "slug": "expanded-polystyrene",
    "name": "Expanded polystyrene",
    "category": "Plastic",
    "densityKgM3": 30,
    "note": "Foamed EPS average",
    "source": "Representative reference value"
  },
  {
    "slug": "acetal",
    "name": "Acetal",
    "category": "Plastic",
    "densityKgM3": 1410,
    "note": "POM engineering plastic",
    "source": "Representative reference value"
  },
  {
    "slug": "peek",
    "name": "PEEK",
    "category": "Plastic",
    "densityKgM3": 1320,
    "note": "High-performance thermoplastic",
    "source": "Representative reference value"
  },
  {
    "slug": "phenolic",
    "name": "Phenolic resin",
    "category": "Plastic",
    "densityKgM3": 1360,
    "note": "Thermoset laminate value",
    "source": "Representative reference value"
  },
  {
    "slug": "urethane",
    "name": "Urethane",
    "category": "Plastic",
    "densityKgM3": 1200,
    "note": "Generic cast urethane",
    "source": "Representative reference value"
  },
  {
    "slug": "silicone-rubber",
    "name": "Silicone rubber",
    "category": "Plastic",
    "densityKgM3": 1150,
    "note": "Elastomer average",
    "source": "Representative reference value"
  },
  {
    "slug": "neoprene",
    "name": "Neoprene",
    "category": "Plastic",
    "densityKgM3": 1230,
    "note": "Synthetic rubber",
    "source": "Representative reference value"
  },
  {
    "slug": "epoxy-resin",
    "name": "Epoxy resin",
    "category": "Plastic",
    "densityKgM3": 1200,
    "note": "Casting resin average",
    "source": "Representative reference value"
  },
  {
    "slug": "fiberglass",
    "name": "Fiberglass",
    "category": "Plastic",
    "densityKgM3": 1850,
    "note": "Glass fiber composite",
    "source": "Representative reference value"
  },
  {
    "slug": "carbon-fiber-composite",
    "name": "Carbon fiber composite",
    "category": "Plastic",
    "densityKgM3": 1600,
    "note": "Laminate average",
    "source": "Representative reference value"
  },
  {
    "slug": "fr4",
    "name": "FR-4",
    "category": "Plastic",
    "densityKgM3": 1850,
    "note": "Circuit board laminate",
    "source": "Representative reference value"
  },
  {
    "slug": "eva-foam",
    "name": "EVA foam",
    "category": "Plastic",
    "densityKgM3": 100,
    "note": "Foamed copolymer",
    "source": "Representative reference value"
  },
  {
    "slug": "polyurethane-foam",
    "name": "Polyurethane foam",
    "category": "Plastic",
    "densityKgM3": 35,
    "note": "Rigid foam representative value",
    "source": "Representative reference value"
  },
  {
    "slug": "bakelite",
    "name": "Bakelite",
    "category": "Plastic",
    "densityKgM3": 1300,
    "note": "Phenol-formaldehyde plastic",
    "source": "Representative reference value"
  },
  {
    "slug": "polyimide",
    "name": "Polyimide",
    "category": "Plastic",
    "densityKgM3": 1420,
    "note": "High-temperature polymer",
    "source": "Representative reference value"
  },
  {
    "slug": "pps",
    "name": "PPS",
    "category": "Plastic",
    "densityKgM3": 1350,
    "note": "Polyphenylene sulfide",
    "source": "Representative reference value"
  },
  {
    "slug": "pvdf",
    "name": "PVDF",
    "category": "Plastic",
    "densityKgM3": 1780,
    "note": "Fluoropolymer",
    "source": "Representative reference value"
  },
  {
    "slug": "fep",
    "name": "FEP",
    "category": "Plastic",
    "densityKgM3": 2150,
    "note": "Fluoropolymer",
    "source": "Representative reference value"
  },
  {
    "slug": "uhmwpe",
    "name": "UHMWPE",
    "category": "Plastic",
    "densityKgM3": 940,
    "note": "Ultra-high-molecular-weight polyethylene",
    "source": "Representative reference value"
  },
  {
    "slug": "aluminum-6061",
    "name": "Aluminum 6061",
    "category": "Metal",
    "densityKgM3": 2700,
    "note": "Common structural alloy",
    "source": "Representative reference value"
  },
  {
    "slug": "aluminum-7075",
    "name": "Aluminum 7075",
    "category": "Metal",
    "densityKgM3": 2810,
    "note": "High-strength aerospace alloy",
    "source": "Representative reference value"
  },
  {
    "slug": "aluminum-1100",
    "name": "Aluminum 1100",
    "category": "Metal",
    "densityKgM3": 2710,
    "note": "Commercially pure aluminum alloy",
    "source": "Representative reference value"
  },
  {
    "slug": "tool-steel",
    "name": "Tool steel",
    "category": "Metal",
    "densityKgM3": 7810,
    "note": "General tool steel average",
    "source": "Representative reference value"
  },
  {
    "slug": "spring-steel",
    "name": "Spring steel",
    "category": "Metal",
    "densityKgM3": 7850,
    "note": "Representative alloy steel value",
    "source": "Representative reference value"
  },
  {
    "slug": "stainless-steel-304",
    "name": "Stainless steel 304",
    "category": "Metal",
    "densityKgM3": 7930,
    "note": "Common austenitic stainless grade",
    "source": "Representative reference value"
  },
  {
    "slug": "stainless-steel-316",
    "name": "Stainless steel 316",
    "category": "Metal",
    "densityKgM3": 8000,
    "note": "Corrosion-resistant austenitic stainless",
    "source": "Representative reference value"
  },
  {
    "slug": "tin",
    "name": "Tin",
    "category": "Metal",
    "densityKgM3": 7310,
    "note": "Pure tin",
    "source": "Representative reference value"
  },
  {
    "slug": "cobalt",
    "name": "Cobalt",
    "category": "Metal",
    "densityKgM3": 8900,
    "note": "Pure cobalt",
    "source": "Representative reference value"
  },
  {
    "slug": "chromium",
    "name": "Chromium",
    "category": "Metal",
    "densityKgM3": 7190,
    "note": "Pure chromium",
    "source": "Representative reference value"
  },
  {
    "slug": "molybdenum",
    "name": "Molybdenum",
    "category": "Metal",
    "densityKgM3": 10220,
    "note": "Pure refractory metal",
    "source": "Representative reference value"
  },
  {
    "slug": "platinum",
    "name": "Platinum",
    "category": "Metal",
    "densityKgM3": 21450,
    "note": "Pure platinum",
    "source": "Representative reference value"
  },
  {
    "slug": "palladium",
    "name": "Palladium",
    "category": "Metal",
    "densityKgM3": 12020,
    "note": "Pure palladium",
    "source": "Representative reference value"
  },
  {
    "slug": "rhodium",
    "name": "Rhodium",
    "category": "Metal",
    "densityKgM3": 12410,
    "note": "Precious metal",
    "source": "Representative reference value"
  },
  {
    "slug": "iridium",
    "name": "Iridium",
    "category": "Metal",
    "densityKgM3": 22560,
    "note": "Among the densest metals",
    "source": "Representative reference value"
  },
  {
    "slug": "bismuth",
    "name": "Bismuth",
    "category": "Metal",
    "densityKgM3": 9780,
    "note": "Low-melting heavy metal",
    "source": "Representative reference value"
  },
  {
    "slug": "antimony",
    "name": "Antimony",
    "category": "Metal",
    "densityKgM3": 6690,
    "note": "Pure antimony",
    "source": "Representative reference value"
  },
  {
    "slug": "beryllium",
    "name": "Beryllium",
    "category": "Metal",
    "densityKgM3": 1850,
    "note": "Light stiff metal",
    "source": "Representative reference value"
  },
  {
    "slug": "cadmium",
    "name": "Cadmium",
    "category": "Metal",
    "densityKgM3": 8650,
    "note": "Pure cadmium",
    "source": "Representative reference value"
  },
  {
    "slug": "inconel",
    "name": "Inconel",
    "category": "Metal",
    "densityKgM3": 8470,
    "note": "Nickel-chromium superalloy average",
    "source": "Representative reference value"
  },
  {
    "slug": "monel",
    "name": "Monel",
    "category": "Metal",
    "densityKgM3": 8800,
    "note": "Nickel-copper alloy average",
    "source": "Representative reference value"
  },
  {
    "slug": "hastelloy",
    "name": "Hastelloy",
    "category": "Metal",
    "densityKgM3": 8890,
    "note": "Corrosion-resistant alloy average",
    "source": "Representative reference value"
  },
  {
    "slug": "solder",
    "name": "Solder",
    "category": "Metal",
    "densityKgM3": 8400,
    "note": "Representative tin-based solder",
    "source": "Representative reference value"
  },
  {
    "slug": "zamak",
    "name": "Zamak",
    "category": "Metal",
    "densityKgM3": 6700,
    "note": "Zinc alloy average",
    "source": "Representative reference value"
  },
  {
    "slug": "cupronickel",
    "name": "Cupronickel",
    "category": "Metal",
    "densityKgM3": 8940,
    "note": "Copper-nickel alloy",
    "source": "Representative reference value"
  },
  {
    "slug": "sterling-silver",
    "name": "Sterling silver",
    "category": "Metal",
    "densityKgM3": 10360,
    "note": "Silver alloy average",
    "source": "Representative reference value"
  },
  {
    "slug": "white-gold",
    "name": "White gold",
    "category": "Metal",
    "densityKgM3": 15500,
    "note": "Jewelry alloy representative value",
    "source": "Representative reference value"
  },
  {
    "slug": "grey-cast-iron",
    "name": "Grey cast iron",
    "category": "Metal",
    "densityKgM3": 7100,
    "note": "Cast iron grade average",
    "source": "Representative reference value"
  },
  {
    "slug": "ductile-iron",
    "name": "Ductile iron",
    "category": "Metal",
    "densityKgM3": 7200,
    "note": "Nodular cast iron average",
    "source": "Representative reference value"
  },
  {
    "slug": "wrought-iron",
    "name": "Wrought iron",
    "category": "Metal",
    "densityKgM3": 7750,
    "note": "Historic low-carbon iron",
    "source": "Representative reference value"
  },
  {
    "slug": "maraging-steel",
    "name": "Maraging steel",
    "category": "Metal",
    "densityKgM3": 8000,
    "note": "High-strength specialty steel",
    "source": "Representative reference value"
  },
  {
    "slug": "tantalum",
    "name": "Tantalum",
    "category": "Metal",
    "densityKgM3": 16650,
    "note": "Dense refractory metal",
    "source": "Representative reference value"
  },
  {
    "slug": "niobium",
    "name": "Niobium",
    "category": "Metal",
    "densityKgM3": 8570,
    "note": "Refractory metal",
    "source": "Representative reference value"
  },
  {
    "slug": "vanadium",
    "name": "Vanadium",
    "category": "Metal",
    "densityKgM3": 6110,
    "note": "Pure vanadium",
    "source": "Representative reference value"
  },
  {
    "slug": "uranium",
    "name": "Uranium",
    "category": "Metal",
    "densityKgM3": 19050,
    "note": "Heavy metal reference value",
    "source": "Representative reference value"
  },
  {
    "slug": "rice",
    "name": "Rice",
    "category": "Food",
    "densityKgM3": 850,
    "note": "Dry bulk grain value",
    "source": "Representative reference value"
  },
  {
    "slug": "oats",
    "name": "Oats",
    "category": "Food",
    "densityKgM3": 430,
    "note": "Loose bulk oats",
    "source": "Representative reference value"
  },
  {
    "slug": "molasses",
    "name": "Molasses",
    "category": "Food",
    "densityKgM3": 1400,
    "note": "Concentrated syrup",
    "source": "Representative reference value"
  },
  {
    "slug": "coffee-beans",
    "name": "Coffee beans",
    "category": "Food",
    "densityKgM3": 560,
    "note": "Roasted bean bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "cocoa-powder",
    "name": "Cocoa powder",
    "category": "Food",
    "densityKgM3": 640,
    "note": "Loose packed powder",
    "source": "Representative reference value"
  },
  {
    "slug": "peanut-butter",
    "name": "Peanut butter",
    "category": "Food",
    "densityKgM3": 1090,
    "note": "Representative spread density",
    "source": "Representative reference value"
  },
  {
    "slug": "jam",
    "name": "Jam",
    "category": "Food",
    "densityKgM3": 1320,
    "note": "Fruit preserve average",
    "source": "Representative reference value"
  },
  {
    "slug": "yogurt",
    "name": "Yogurt",
    "category": "Food",
    "densityKgM3": 1030,
    "note": "Plain yogurt average",
    "source": "Representative reference value"
  },
  {
    "slug": "ice-cream",
    "name": "Ice cream",
    "category": "Food",
    "densityKgM3": 560,
    "note": "Aerated frozen dessert",
    "source": "Representative reference value"
  },
  {
    "slug": "potato",
    "name": "Potato",
    "category": "Food",
    "densityKgM3": 720,
    "note": "Whole potato representative value",
    "source": "Representative reference value"
  },
  {
    "slug": "apple-fruit",
    "name": "Apple",
    "category": "Food",
    "densityKgM3": 609,
    "note": "Whole apple representative value",
    "source": "Representative reference value"
  },
  {
    "slug": "banana",
    "name": "Banana",
    "category": "Food",
    "densityKgM3": 940,
    "note": "Whole fruit representative value",
    "source": "Representative reference value"
  },
  {
    "slug": "grapes",
    "name": "Grapes",
    "category": "Food",
    "densityKgM3": 1040,
    "note": "Whole fruit average",
    "source": "Representative reference value"
  },
  {
    "slug": "egg",
    "name": "Egg",
    "category": "Food",
    "densityKgM3": 1030,
    "note": "Whole egg average",
    "source": "Representative reference value"
  },
  {
    "slug": "bread",
    "name": "Bread",
    "category": "Food",
    "densityKgM3": 260,
    "note": "Aerated loaf value",
    "source": "Representative reference value"
  },
  {
    "slug": "wheat-grain",
    "name": "Wheat grain",
    "category": "Food",
    "densityKgM3": 790,
    "note": "Bulk grain density",
    "source": "Representative reference value"
  },
  {
    "slug": "corn-kernels",
    "name": "Corn kernels",
    "category": "Food",
    "densityKgM3": 720,
    "note": "Dry corn bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "chocolate",
    "name": "Chocolate",
    "category": "Food",
    "densityKgM3": 1325,
    "note": "Solid chocolate average",
    "source": "Representative reference value"
  },
  {
    "slug": "butter",
    "name": "Butter",
    "category": "Food",
    "densityKgM3": 911,
    "note": "Dairy fat average",
    "source": "Representative reference value"
  },
  {
    "slug": "cheese",
    "name": "Cheese",
    "category": "Food",
    "densityKgM3": 1100,
    "note": "Semi-hard cheese average",
    "source": "Representative reference value"
  },
  {
    "slug": "vinegar-food",
    "name": "Vinegar",
    "category": "Food",
    "densityKgM3": 1010,
    "note": "Condiment average",
    "source": "Representative reference value"
  },
  {
    "slug": "soy-sauce-food",
    "name": "Soy sauce",
    "category": "Food",
    "densityKgM3": 1180,
    "note": "Condiment average",
    "source": "Representative reference value"
  },
  {
    "slug": "maple-syrup-food",
    "name": "Maple syrup",
    "category": "Food",
    "densityKgM3": 1330,
    "note": "Syrup average",
    "source": "Representative reference value"
  },
  {
    "slug": "mayonnaise",
    "name": "Mayonnaise",
    "category": "Food",
    "densityKgM3": 910,
    "note": "Emulsion average",
    "source": "Representative reference value"
  },
  {
    "slug": "olive",
    "name": "Olive",
    "category": "Food",
    "densityKgM3": 980,
    "note": "Whole fruit average",
    "source": "Representative reference value"
  },
  {
    "slug": "almonds",
    "name": "Almonds",
    "category": "Food",
    "densityKgM3": 640,
    "note": "Bulk nut density",
    "source": "Representative reference value"
  },
  {
    "slug": "walnuts-food",
    "name": "Walnuts",
    "category": "Food",
    "densityKgM3": 620,
    "note": "Bulk nut density",
    "source": "Representative reference value"
  },
  {
    "slug": "quartz",
    "name": "Quartz",
    "category": "Stone",
    "densityKgM3": 2650,
    "note": "Mineral reference value",
    "source": "Representative reference value"
  },
  {
    "slug": "feldspar",
    "name": "Feldspar",
    "category": "Stone",
    "densityKgM3": 2560,
    "note": "Mineral average",
    "source": "Representative reference value"
  },
  {
    "slug": "slate",
    "name": "Slate",
    "category": "Stone",
    "densityKgM3": 2750,
    "note": "Metamorphic rock average",
    "source": "Representative reference value"
  },
  {
    "slug": "shale",
    "name": "Shale",
    "category": "Stone",
    "densityKgM3": 2400,
    "note": "Sedimentary rock average",
    "source": "Representative reference value"
  },
  {
    "slug": "gypsum",
    "name": "Gypsum",
    "category": "Stone",
    "densityKgM3": 2320,
    "note": "Mineral reference value",
    "source": "Representative reference value"
  },
  {
    "slug": "coal",
    "name": "Coal",
    "category": "Stone",
    "densityKgM3": 1350,
    "note": "Bituminous coal average",
    "source": "Representative reference value"
  },
  {
    "slug": "asphalt",
    "name": "Asphalt",
    "category": "Stone",
    "densityKgM3": 2320,
    "note": "Paving mix representative value",
    "source": "Representative reference value"
  },
  {
    "slug": "cement-powder",
    "name": "Cement powder",
    "category": "Stone",
    "densityKgM3": 1440,
    "note": "Bulk cement density",
    "source": "Representative reference value"
  },
  {
    "slug": "plaster",
    "name": "Plaster",
    "category": "Stone",
    "densityKgM3": 850,
    "note": "Dry bulk plaster average",
    "source": "Representative reference value"
  },
  {
    "slug": "pumice",
    "name": "Pumice",
    "category": "Stone",
    "densityKgM3": 700,
    "note": "Porous volcanic rock",
    "source": "Representative reference value"
  },
  {
    "slug": "obsidian",
    "name": "Obsidian",
    "category": "Stone",
    "densityKgM3": 2400,
    "note": "Volcanic glass average",
    "source": "Representative reference value"
  },
  {
    "slug": "travertine",
    "name": "Travertine",
    "category": "Stone",
    "densityKgM3": 2500,
    "note": "Natural stone average",
    "source": "Representative reference value"
  },
  {
    "slug": "dolomite",
    "name": "Dolomite",
    "category": "Stone",
    "densityKgM3": 2850,
    "note": "Mineral-rich rock average",
    "source": "Representative reference value"
  },
  {
    "slug": "soapstone",
    "name": "Soapstone",
    "category": "Stone",
    "densityKgM3": 2980,
    "note": "Metamorphic rock average",
    "source": "Representative reference value"
  },
  {
    "slug": "crushed-stone",
    "name": "Crushed stone",
    "category": "Stone",
    "densityKgM3": 1600,
    "note": "Loose aggregate bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "topsoil",
    "name": "Topsoil",
    "category": "Soil",
    "densityKgM3": 1300,
    "note": "General topsoil average",
    "source": "Representative reference value"
  },
  {
    "slug": "silt",
    "name": "Silt",
    "category": "Soil",
    "densityKgM3": 1400,
    "note": "Dry silt bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "loam",
    "name": "Loam",
    "category": "Soil",
    "densityKgM3": 1250,
    "note": "Loose loam value",
    "source": "Representative reference value"
  },
  {
    "slug": "peat",
    "name": "Peat",
    "category": "Soil",
    "densityKgM3": 400,
    "note": "Organic soil average",
    "source": "Representative reference value"
  },
  {
    "slug": "compost",
    "name": "Compost",
    "category": "Soil",
    "densityKgM3": 600,
    "note": "Finished compost bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "wet-sand",
    "name": "Wet sand",
    "category": "Soil",
    "densityKgM3": 1920,
    "note": "Moist packed sand",
    "source": "Representative reference value"
  },
  {
    "slug": "sandy-loam",
    "name": "Sandy loam",
    "category": "Soil",
    "densityKgM3": 1500,
    "note": "Field bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "clay-loam",
    "name": "Clay loam",
    "category": "Soil",
    "densityKgM3": 1450,
    "note": "Field bulk density",
    "source": "Representative reference value"
  },
  {
    "slug": "mulch",
    "name": "Mulch",
    "category": "Soil",
    "densityKgM3": 320,
    "note": "Loose wood mulch",
    "source": "Representative reference value"
  },
  {
    "slug": "perlite",
    "name": "Perlite",
    "category": "Soil",
    "densityKgM3": 110,
    "note": "Expanded horticultural aggregate",
    "source": "Representative reference value"
  }
]