pH

{
  "id": "NISTu332",
  "unitsml_id": "u:pH",
  "name": "pH",
  "names": [
    {
      "value": "pH",
      "lang": "en"
    }
  ],
  "symbols": {
    "unicode": "pH",
    "ascii": "pH",
    "html": "pH",
    "latex": "\\ensuremath{\\mathrm{pH}}",
    "id": "pH",
    "mathml": "<mi mathvariant='normal'>pH</mi>"
  },
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTu332"
    },
    {
      "type": "unitsml",
      "id": "u:pH"
    }
  ],
  "references": [
    {
      "type": "informative",
      "authority": "ucum",
      "uri": "ucum:unit:chemical:code:[pH]"
    },
    {
      "type": "informative",
      "authority": "qudt",
      "uri": "http://qudt.org/vocab/unit/PH"
    }
  ],
  "short": "pH",
  "root": true,
  "composite": false,
  "quantities": [
    {
      "id": "NISTq174",
      "name": "index of acidity",
      "type": "derived"
    }
  ],
  "dimension": {
    "id": "NISTd94",
    "name": "acidity index",
    "expression": "1",
    "components": [],
    "dimensionless": true
  },
  "scale": {
    "id": "logarithmic_ratio",
    "name": "logarithmic ratio scale"
  },
  "systems": [
    {
      "id": "non-SI_not_acceptable",
      "name": "non-SI and not acceptable",
      "short": "nonsi-unacceptable",
      "acceptable": false
    }
  ],
  "root_units": null
}