The CAS Registry file of Substances
Chemical Abstracts Service (CAS)
CAS REGISTRYSM is the world‘s lar-gest substance database cover-ing substance information on all types of organic and inorganic substances, including polymers, alloys, coordination compounds, and mixtures. All substance rec- ords contain a unique CAS Regis-try Number® (CAS RN®). Covera-ge includes substances reported in the literature back to the early 1800s. The file is updated daily and contains• more than 150 million organic and inorganic substances and more than 70 million sequences• comprehensive substance infor- mation including chemical structures, trade names, systematic names, synonyms, and molecular formula• calculated and experimental property data.