Catalyst

{
  "id": "MLC-T-ENV-004322",
  "term": "Catalyst",
  "field": "Environment",
  "definition": "1. (CAT-uh-LIST) A substance that changes the speed or yield of a chemical reaction without being consumed or chemically changed by the chemical reaction.\n\n2. A substance that changes the speed or yield of a chemical reaction without being consumed or chemically changed by the chemical reaction.\n\n3. Substance which, when added to asphalt flux in a blowing still, alters the penetrating-softening point relationship or increases the rate of oxidation of the flux.\n\n4. A substance that increases the rate of a chemical reaction without being consumed or produced by the reaction. Enzymes are catalysts for many biochemical reactions.\n\n5. Substance that changes the speed or yield of a chemical reaction without being consumed or chemically changed by the chemical reaction .",
  "subject": "Policy and guidance",
  "references": [
    "Drinking Water Technical & Legal Terms",
    "Terms of Environment; Importing Vehicles and Engines Glossary",
    "40 CFR 60.471 (CFR 2013)",
    "DOE Office of Energy Efficiency & Renewable Energy Bioenergy Glossary",
    "Drinking Water Technical and Legal 2009"
  ],
  "url": "https://mlchart.com/terminology/environment/catalyst/"
}