Agent Name

C.I. Direct Red 2

CAS Number

992-59-6

Formula

C34-H26-N6-O6-S2.2Na

Major Category

Dyes

Synonyms

1-Naphthalenesulfonic acid, 3,3'-((3,3'-dimethyl(1,1'-diphenyl)-4,4'-diyl)bis(azo))bis(4-amino-, disodium salt; Amanil Purpurine; Amanil Purpurine 4B; Atul Direct Red 4B; Azamin 4B; Azocard Red 4B; Bencidal Purple 4B; Benzanil Purpurine 4B; Benzopurpurin 4B; Benzopurpurine 4B; Benzopurpurine 4BKX; Benzopurpurine 4BX; Brasilamina Red 4B; C.I. 23500; C.I. Direct Red 2 disodium salt; Calcomine Red 4BX; Cerven prima 2 [Czech]; Chrome Leather Red 4B; Cotton Red 4B; Diacotton Benzopurpurine 4B; Diamine Purpurine 4B; Diaphtamine Purpurine 4B; Diaphtamine Purpurine; Diazamine Purpurine 4B; Diazine Red 4B; Diazol Purpurine 4B; Diphenyl Red 4B; Diphenyl Red 4BS; Direct Purpurine 4B; Direct Purpurine M4B; Direct Red 2; Direct Red 4A; Direct Red 4B; Direct Red DCB; Disodium o-tolidinediazobis(1-naphthylamine-4-sulfonate); Ditolybis(azonaphthionic acid); Ditolylbis(azonaphthionic acid); Eclipse Red; Erie Benzo 4BP; Erie Red 4B; Fast Scarlet; Hispamin Red 4B; Kayaku Benzopurpurine 4B; Mitsui Benzopurpurine 4BX; Paper Red 4B; Paper Red 4BS; Phenamine Purpurine 4B; Purpurin 4B; Purpurine 4B; Tertrodirect Red 4B; Tetrodirect Red 4B; [ChemIDplus]

Category

Benzidine Dyes

Description

Brown or dark red solid; [HSDB] Powder; [MSDSonline]

Sources/Uses

Used as dye (chromed leather, cotton, wool, viscose rayon, silk, nylon, linen, paper, cellulose, and jute), analytical reagent (detection of aluminum, magnesium, mercury, silver, and uranium), biological stain, and pH indicator; [HSDB]

Comments

May cause irritation; May cause vomiting and diarrhea after ingestion; [MSDSonline] Metabolic studies have shown that bacteria and mammals can cleave this molecule to form potentially carcinogenic aromatic amines; [HSDB] Dimethylbenzidine-based dyes are reasonably anticipated to be human carcinogens, but neither dogs or rats excreted quantifiable amounts of DMB after being fed C.I. Direct Red 2 or C.I. Direct Red 39; [NTP]

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