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Testing Status of C.I. Direct Red 28 10634-F


CASRN: 573-58-0

Formula: C32-H24-N6-O6-S2.2Na

Synonyms/Common Names

  • 3,3'-((1,1'-biphenyl)-4,4'-diylbis(2,1-diazenediyl))bis(4-amino-, sodium salt (1:2)

Known Uses

Dye for silk, wool, acetate, & paper; biological stain; diagnostic aid; indicator for free mineral acids; reagent for bitter almond water.

Chemical Properties

Toxicity Effects (HSDB)

Special Studies

  • Metabolism (Gavage)  (S0016)  Completed 
    • Citation: Lynn RK, Donielson DW, Ilias AM, Kennish JM, Wong K, Matthews HB. Metabolism of bisazobiphenyl dyes derived from benzidine, 3,3'-dimethylbenzidine or 3,3'-dimethoxybenzidine to carcinogenic aromatic amines in the dog and rat. Toxicol Appl Pharmacol. 1980 Nov;56(2):248-58.Pubmed Abstract
    • Male Rats: Sprague Dawley; Dog