CAS Registry Number

CAS 641-70-3 — 3-Nitrophthalic anhydride

3-Nitrophthalic anhydride is a reactive organic compound used in the synthesis of dyes, pharmaceuticals, and specialty polymers. It is a yellow crystalline solid with a molecular formula of C8H3NO5 and a molecular weight of 193.11 g/mol. It is stable at ambient temperatures and should be stored under normal conditions. The substance is classified with a warning signal word due to its potential hazards. Molekula supplies 3-Nitrophthalic anhydride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.