research NTP Toxicology and Carcinogenesis Studies of C.I. Acid Orange 3 (CAS No. 6373-74-6) in F344/N Rats and B6C3F1 Mice (Gavage Studies).
This study concluded that there was clear evidence of carcinogenic activity of C.I. Acid Orange 3 in female F344/N rats but not in male rats or B6C3F1 mice of either sex.

