Chemical Abstracts Services Registry Number

{
  "id": "MLC-T-ENV-004715",
  "term": "Chemical Abstracts Services Registry Number",
  "field": "Environment",
  "definition": "1. Refers to Chemical Abstracts Service Registry Number (http://www.cas.org/), a numerical index for chemical substances that has the general format 000000-00-0. CAS registry numbers, along with the chemical name, are the most commonly used chemical identifiers employed in public chemical lists and toxicity databases. The last digit of a CAS No. represents an error-check code that can be used to verify that the CAS number is valid. DSSTox files employ strict CAS No. formatting and error-check codes are verified as a quality control measure. See TestSubstance_CASRN (http://www.epa.gov/ncct/dsstox/StandardChemFieldDefTable.html#TestSubstance_CASRN) for more information on how CAS are incorporated into DSSTox Data Files.\n\n2. Refers to Chemical Abstracts Service Registry Number, a numerical index for chemical substances that has the general format 000000-00-0. CAS registry numbers, along with the chemical name, are the most commonly used chemical identifiers employed in public chemical lists and toxicity databases. The last digit of a CAS No. represents an error-check code that can be used to verify that the CAS number is valid. DSSTox files employ strict CAS No. formatting and error-check codes are verified as a quality control measure.",
  "abbreviation": "CAS",
  "subject": "Chemicals, toxics and pesticides",
  "references": [
    "DSSTox Public Database Network Glossary of Terms",
    "DSSTox Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/chemical-abstracts-services-registry-number/"
}