aspirin Search Term: aspirinSource Category: ASSISTAspirin is on the Recommended Chemicals list for Australian schools. Synonyms: 2-(acetyloxy)-benzoic acid, o-acetylsalicylic acid, acetylsalicylicacid; CAS Number: 50-78-2; Signal Word: Danger. Tags: 50-78-22-(acetyloxy)-benzoic acido-acetylsalicylic acidacetylsalicylicacid