Benzidine is the trivial name for 4,4'-diaminobiphenyl, a carcinogenic aromatic amine which has been used as part of a test for cyanide and also in the synthesis of dyes. It has been linked to bladder cancer and pancreatic cancer.
In the past a common test for blood used benzidine but this has largely been replaced by tests using phenolphthalein / hydrogen peroxide and luminol. An enzyme in blood causes the benzidine to be oxidized to a polymer which is blue coloured. The test for cyanide uses similar chemistry to give the blue colour.
Localization of benzidine tetrachloride. (New Product Brief).(Shandong Taishan Dye Stuff Company Ltd. uses catalytic hydrogenation to develop 2,2', 5,5'-benzidine tetrachloride)(Brief Article)
Feb 06, 2003; Shandong Taishan Dye stuff Company, Ltd. has successfully developed 2,2', 5,5'-Benzidine tetrachloride through catalytic...
Benzidine tetrachloride achieves localization. (New Product in Brief).(Shandong Taishan Dyestuff Company Ltd. uses catalytic hydrogenation to produce benzidine tetrachloride)(Brief Article)
Jan 06, 2003; Shandong Taishan Dyestuff Co., Ltd., an important research and production base of dyestuff intermediates in China, has...