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| 2-Naphthylamine | |
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| IUPAC name | 2-Aminonaphthalene |
| Other names | 2-Naphthylamine β-Naphthylamine |
| Identifiers | |
| CAS number | 91-59-8 |
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| Properties | |
| Molecular formula | C10H9N |
| Molar mass | 143.19 g/mol |
| Density | 1.061 g/cm3 |
| Melting point |
111-113 °C |
| Boiling point |
306 °C |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
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2-Naphthylamine is an aromatic amine. It is used to make azo dyes. It is a known human carcinogen and has largely been replaced by less toxic compounds. 2-Naphthylamine is prepared by heating 2-naphthol with ammonium zinc chloride to 200-210 °C; or in the form of its acetyl derivative by heating 2-naphthol with ammonium acetate to 270-280 °C. It forms odorless, colorless plates which melt at 111-112 °C. It gives no color with ferric chloride. When reduced by sodium in boiling amyl alcohol solution it forms alicyclic tetrahydro-3-naphthylamine, which has most of the properties of the aliphatic amines; it is strongly alkaline in reaction, has an ammoniacal odor and cannot be diazotized. On oxidation it yields ortho-carboxy-hydrocinnamic acid, HO2C•C6H4•CH2•CH2•CO2H. Numerous sulfonic acids derived from 2-naphthylamine are known. Of these, the δ-acid and Bronner's acid are of more value technically, since they combine with ortho-tetrazoditolyl to produce fine red dye-stuffs.
Role in disease
2-Naphthylamine is found in cigarette smoke and suspected to be contributory to the development of bladder cancer.1
References
- ^ Steinberg GD, Kim HL. Bladder Cancer. eMedicine.com. URL: http://www.emedicine.com/MED/topic2344.htm. Accessed on: May 9, 2007.
See also
