4-Aminobiphenyl

• 4- aminobiphenyl
• P- phenylaniline
• Biphenyl-4- ylamine
• P- aminobiphenyl
• P- aminobiphenyl
• 4- biphenyl
• Xenylamin

Colorless, flammable solid with a flowery smell

Fixed

1.16 g · cm -3

52-54 ° C

302 ° C

20 hPa ( 191 ° C)

• Practically insoluble in water
• Soluble in alcohol, ether, and chloroform

Risk

500 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

4 -aminobiphenyl is a chemical compound from the group of amino compounds, more specifically a derivative of biphenyl. It is a colorless, flammable solid front with a flowery smell, which turns on contact with air by oxidation purple.

Occurrence

4 -aminobiphenyl is produced in the reductive cleavage of azo dyes. It also occurs as Verunreinung of diphenylamine. It has been demonstrated in tobacco smoke.

Use

4 -aminobiphenyl was formerly used as a rubber antioxidant, as an intermediate for the preparation of azo dyes and as a detection substance for sulphates. But after already in 1950 it was clear the development of bladder cancer in contact with the substance to the 1970s, production was stopped. The substance is not released from textiles or leather articles which may come a long time with the human skin directly in contact are (Appendix 1 of the Consumer Goods Ordinance ) after reductive cleavage of azo groups.

Proof

4 -aminobiphenyl can be detected by thin layer chromatography to the free base by absorption in sulfuric acid and transfer.

Safety

4 -aminobiphenyl is classified as a carcinogen.

Related compounds

• Benzidine
• Hydroxy-4- aminobiphenyls, such as 3-hydroxy -4- aminobiphenyl, CAS: 4363-03-5
• Dianisidines ( Dimethoxybenzidine ), for example o -dianisidine, CAS: 119-90-4
• 2 -aminobiphenyl and 3- aminobiphenyl ( isomeric compounds )