Agent Name

C.I. Direct Blue 15

CAS Number




Major Category



Airedale Blue D; Aizen Direct Sky Blue 5B; Aizen Direct Sky Blue 5BH; Amanil Sky Blue; Atlantic Sky Blue A; Atul Direct Sky Blue; Azine Sky Blue 5B; Belamine Sky Blue A; Benzanil Sky Blue; Benzo Sky Blue A-CF; Benzo Sky Blue S; C.I. 24400; C.I. Direct Blue 15, tetrasodium salt; CI Direct Blue 15; Cartalsol Blue 2GF; Cartasol Blue 2GF; Chloramine Sky Blue 4B; Chloramine Sky Blue A; Chrome Leather Pure Blue; Cresotine Pure Blue; Diacotton Sky Blue 5B; Diamine Blue; Diamine Blue 6B; Diamine Sky Blue; Diamine Sky Blue CI; Diaphtamine Pure Blue; Diazol Pure Blue 4B; Diphenyl Brilliant Blue; Diphenyl Sky Blue 6B; Direct Blue 10G; Direct Blue 15; Direct Blue HH; Direct Pure Blue; Direct Pure Blue M; Direct Pure Blue N; Direct Sky Blue; Direct Sky Blue 5B; Direct Sky Blue A; Enianil Pure Blue AN; Fenamin Sky Blue; Hispamin Sky Blue 3B; Kayafect Blue Y; Kayaku Direct SKH Blue 5B; Kayaku Direct Sky Blue 5B; Mitsui Direct Sky Blue 5B; Modr Prima 15 [Czech]; NCI C61290; Naphtamine Blue 10G; Niagara Blue 4B; Niagara Sky Blue; Nippon Direct Sky Blue; Nippon Sky Blue; Nitsui Direct Sky Blue 5B; Nitto Direct Sky Blue 5B; Oxamine Sky Blue 5B; Paper Blue S; Phenamine Sky Blue A; Pontacyl Sky Blue 4BX; Pontamine Sky Blue 5 BX; Pontamine Sky Blue 5BX; Shikiso Direct Sky Blue 5B; Sky Blue 4B; Sky Blue 5B; Tertrodirect Blue F; Vondacel Blue HH; 2,7-Naphthalenedisulfonic acid, 3,3'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(2,1-diazenediyl))bis(5-amino-4-hydroxy-, sodium salt (1:4); 2,7-Naphthalenedisulfonic acid, 3,3'-((3,3'-dimethoxy-4,4'-biphenylylene)bis(azo))bis(5-amino-4-hydroxy-, tetrasodium salt; Tetrasodium 3,3'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(5-amino-4-hydroxynaphthalene-2,7-disulphonate); [ChemIDplus]


Benzidine Dyes


Deep purple to dark blue solid; [CAMEO] Dark bluish-grey odorless powder; [MSDSonline]


Used as dye (silk, wool, viscose, leather, paper, cotton, and other cellulose fibers), biological stain, and tint for cinematographic films; [HSDB]


A 3,3'-Dimethoxybenzidine derived dye; Metabolically converted to Dimethoxybenzidine in rodent intestinal tracts; High-dose oral studies of rats identified the liver and kidneys as target organs; [HSDB] One of the azo dyes metabolized to o-dianisidine--reasonably anticipated to be a human carcinogen; [NTP] May cause irritation; Limited evidence that it is carcinogenic; [MSDSonline]

Adverse Effects

Hepatotoxin, Secondary

IARC Carcinogen

Possible Carcinogen

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

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Related Information in HazMap

Industrial Processes with risk of exposure: