mass density

{
  "id": "NISTd30",
  "unitsml_id": "d:mass_density",
  "name": "mass density",
  "names": [
    {
      "value": "mass density",
      "lang": "en"
    }
  ],
  "expression": "L-3·M",
  "dimensionless": false,
  "components": [
    {
      "key": "length",
      "symbol": "L",
      "power": -3
    },
    {
      "key": "mass",
      "symbol": "M",
      "power": 1
    }
  ],
  "quantities": [
    {
      "id": "NISTq33",
      "name": "mass concentration"
    },
    {
      "id": "NISTq51",
      "name": "density"
    }
  ],
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTd30"
    },
    {
      "type": "unitsml",
      "id": "d:mass_density"
    }
  ],
  "references": [
    {
      "type": "informative",
      "authority": "qudt",
      "uri": "http://qudt.org/vocab/dimensionvector/A0E0L-3I0M1H0T0D0"
    }
  ]
}