Colour indicator

{
  "id": "MLC-T-CHM-002253",
  "term": "Colour indicator",
  "field": "Chemistry",
  "definition": "A substance that changes color in response to a chemical change, typically a change in pH or the presence of a specific chemical species. It is used to visually signal the completion of a chemical reaction, such as in titrations. Phenolphthalein, which changes from colorless to pink around pH 8.2-10.0, is a common example.",
  "synonyms": [
    "color indicator",
    "indicator"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "acid-base indicator",
    "adsorption indicator",
    "mixed indicator"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 48 (https://media.iupac.org/publications/analytical_compendium/)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/colour-indicator/"
}