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] See "Disperse Red 1."

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

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: