Naphthionic acid
 | |
| Names | |
|---|---|
| IUPAC name
4-aminonaphthalene-1-sulfonic acid | |
| Other names
Piria's acid | |
| Identifiers | |
| 84-86-6 | |
| 3D model (Jmol) | Interactive image |
| ChEBI | CHEBI:38219 |
| ChemSpider | 6532 |
| ECHA InfoCard | 100.001.425 |
| EC Number | 201-567-9 |
| PubChem | 6790 |
| |
| |
| Properties | |
| C10H9NO3S | |
| Molar mass | 223.24 |
| Appearance | white solid |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Naphthionic acid is an organic compound with the formula C10H6(SO3H)(NH2). It is one of several aminonaphthalenesulfonic acids, derivatives of naphthalene containing both amine and sulfonic acid functional groups. It is a white solid, although commercial samples can appear gray.[1] It is used in the synthesis of azo dyes such as Rocceline (a. k. a. Solid Red A), during which the amino group of the acid (in the form of a salt) is diazotated and then coupled with, in the case mentioned, β-naphthol. It is prepared by treating 1-aminonaphthalene with sulfuric acid.[2]
References
- ↑ 4-Amino-1-naphthalenesulfonic acid; MSDS No. 250619; Sigma–Aldrich Chemie GmbH: Steinheim, 29 Dec 2011.
- ↑ Gerald Booth "Naphthalene Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH, Weinheim. doi:10.1002/14356007.a17_009.
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