3,3'-[(1,1'-Biphenyl)-4,4'-Diylbis(Azo)]Bis(5-Amino-4-Hydroxy)- 2,7-Naphthalenedisulfonic Acid, Tetrasodium Salt
[A Benzidine-based azo dye that is metabolized to free Benzidine in vivo. Direct blue 6 is primarily used for the dyeing of textiles, leather and paper. Benzidine and its metabolic derivatives have been detected in the urine of workers exposed to Benzidine-based dyes. Exposure to this dye is strongly associated with the occurrence of bladder cancer. (NCI05) ( NCI )]