CASREACT Chemical Abstracts Reactions database Database Producer Chemical Abstracts Service (CAS) Description Chemical Abstracts Reaction Search Service contains information on reac-tions of organic substances, including organometallics and biomolecules. 368.3 KB Download: CASREACT (PDF) Database Summary Sheet: Concise description with all fields, all formats, many examples. 699.11 KB Download: Usage terms (PDF) In addition to the STN General Terms & Conditions, please find the file-specific Usage Terms here. Cluster CASRNs Corpsource Hpatents Patents Reaction Structure Features Alerts CAS RN Images Select Citation Structure Search Subjects Chemistry