4-hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid
7-anilino-4-hydroxynaphthalene-2-sulphonic acid
CAS: 119-40-4
Molecular Formula: C16H13NO4S
4-hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid - Names and Identifiers
| Name | 7-anilino-4-hydroxynaphthalene-2-sulphonic acid |
| Synonyms | Phenyl J Acid phenyl J-acid 2-Anilino-5-Naphthol-7-sulfonic acid 2- phenylamino-5-naphthol-7-sulfonic acid N-Phenyl-2-Amino-5-Naphthol-7-Sulfonic Acid 7-Anilino-4-hydroxy-2-naphtalenesulfonic acid 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid 7-anilino-4-hydroxynaphthalene-2-sulphonic acid 4-Hydroxy-7-(Phenylamino)-2-Naphthalenesulfonic Acid 4-hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid |
| CAS | 119-40-4 |
| EINECS | 204-320-3 |
| InChI | InChI=1/C16H13NO4S/c18-16-10-14(22(19,20)21)9-11-8-13(6-7-15(11)16)17-12-4-2-1-3-5-12/h1-10,17-18H,(H,19,20,21) |
4-hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid - Physico-chemical Properties
| Molecular Formula | C16H13NO4S |
| Molar Mass | 315.34 |
| Density | 1.495g/cm3 |
| pKa | -0.18±0.40(Predicted) |
| Storage Condition | 2-8℃ |
| Refractive Index | 1.734 |
| MDL | MFCD00035714 |
| Physical and Chemical Properties | White or gray crystalline powder. Slightly soluble in water and ethanol, soluble in alkali solution. is used as a dye intermediate to prepare direct dyes, mordant dyes and acid dyes. |
| Use | Use 1. Used as an intermediate of sun-resistant blue RGL. 2, the product is a dye intermediate, for the synthesis of azo dyes direct copper salt green BTL, copper salt blue FBGL and copper salt purple BBL. |
4-hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
4-hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid - Nature
| EPA chemical information | 4-Hydroxy-7-(phenylamino)-2-naphthalenesulfonic acid (119-40-4) |
Last Update：2024-04-10 22:29:15
4-hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid - Production method
It is obtained by condensation of J acid and aniline in sodium bisulfite medium. Put J acid, aniline, sodium bisulfite and sodium carbonate into water, raise the temperature to 104-106 ℃ within 1.5h, keep the temperature for 40h, and the pressure is about 0.1MPa. Heat preservation, cold to 30 ℃, filter. Add the filter cake to the water, raise the temperature to 80-85 ℃, and add concentrated sulfuric acid in a trickle to decompose the excess sodium bisulfite to escape sulfur dioxide, and the feed liquid remains blue to the Congo red test paper. After most of the sulfur dioxide escapes, stir for 1h, cool to 30 ℃, filter, and wash the filter cake with saturated salt water to obtain a paste with a content of ≥ 40%, namely N-phenyl J acid.
Last Update：2024-04-10 22:29:15
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