National Toxicology Program

National Toxicology Program

Testing Status of C.I. Direct Blue 14 - 11118-P


CASRN: 72-57-1

Formula: C34-H28-N6-O14-S4.4Na

Synonyms/Common Names

  • 2,7-Naphthalenedisulfonic acid, 3,3'-((3,3'-dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(2,1-diazenediyl))bis(5-amino-4-hydroxy-, sodium salt (1:4)
  • Trypan Blue

Known Uses

Dye for textiles, leather & paper, therapeutic agent for sleeping sickness

Chemical Properties

Toxicity Effects (HSDB)

Genetic Toxicology

  • Salmonella  (A63090)  Completed 
    •  Positive 
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.