Retarder

{
  "id": "MLC-T-CHM-010283",
  "term": "Retarder",
  "field": "Chemistry",
  "definition": "A substance that lowers the rate of a reaction, chiefly in polymerization kinetics, where it slows chain growth by reacting with propagating radicals to give less reactive species. IUPAC treats it as synonymous with inhibitor. Polymer chemists often draw a distinction, in which an inhibitor produces a delay before polymerization starts and a retarder only slows the polymerization rate.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "inhibitor",
    "polymerization",
    "rate of reaction"
  ],
  "references": [
    "PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 185 (https://doi.org/10.1351/pac199668010149)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/retarder/"
}