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Agent Name Azo violet
CAS Number 74-39-5
Formula C12-H9-N3-O4
Major Category Dyes
Synonyms 1,3-Benzenediol, 4-((4-nitrophenyl)azo)-; 2,4-Dihydroxy-4'-nitroazobenzene; 4-((4-Nitrophenyl)azo)-1,3-benzenediol; 4-(4-Nitrophenyl)azoresorcinol; 4-(p-Nitrophenylazo)resorcinol; Magneson; Magneson I; Magnezon I; p-Diazoviolet; p-Diazviolet; p-Nitrobenzeneazoresorcinol; p-Nitrophenylazoresorcinol; [ChemIDplus]
Category Azo Dyes
Description A solid insoluble in water; [Sax]
Sources/Uses Used as a pH indicator for titration of nonaqueous solvents; [Ullmann]
Comments May cause allergic contact dermatitis; May be toxic by ingestion; [MSDSonline]
Exposure Assessment
Explanatory Notes mp = 185 deg C; [Sax]
Flammability (NFPA) 1: must be preheated
Adverse Effects
Skin Sensitizer Yes
Links to Other NLM Databases
Toxicity Information Search TOXNET
Chemical Information Search ChemIDplus
Related Information in Haz-Map
Diseases Occupational diseases associated with exposure to this agent:




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Last updated: January, 2009