CHEMCATS Chemical Catalogs Online Database Producer Chemical Abstracts Service (CAS) Description Chemical Catalogs Online is a cata-log file containing information about millions of commercially available che-micals and their worldwide suppliers. 86.83 KB Download: CHEMCATS (PDF) Database Summary Sheet: Concise description with all fields, all formats, many examples. 669.35 KB Download: Usage terms (PDF) In addition to the STN General Terms & Conditions, please find the file-specific Usage Terms here. Cluster CASRNs Companies Features CAS RN Images Subjects Chemistry Material Sciences