benzidine

benzidine

 [ben´zĭ-dēn]

a compound formed by the action of acids on hydrazobenzene, once widely used in testing for occult blood; its use is now limited because it is toxic and carcinogenic.

ben·zi·dine

(ben'zi-dēn),

A p-diaminophenyl, previously used to detect stool blood and agueous sulfates and as a reagent in special stains; now identified as a carcinogen.

benzidine

A yellowish or reddish crystalline powder used in a test to detect small quantities of blood.