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| 1-Naphthylamine-7-sulfonic acid Basic information | Synthesis |
| 1-Naphthylamine-7-sulfonic acid Chemical Properties |
Hazard Codes | C | Risk Statements | 34 | Safety Statements | 26-36/37/39-45 | RIDADR | UN 2585 8/PG 3 | WGK Germany | 2 | TSCA | Yes | HazardClass | 8 | PackingGroup | III | HS Code | 29214500 |
| 1-Naphthylamine-7-sulfonic acid Usage And Synthesis |
Synthesis | 1-Naphthylamine-7-sulfonic acid can be obtained by sulfonation, nitration, neutralization, reduction and acid precipitation of naphthalene. | Chemical Properties | Brown crystalline. 1-Aminonaphthalene-7-sulfonic acid [119- 28-8]. (8-aminonaphthalene-2-sulfonic acid), 1,7-Cleve’s acid, C10H9NO3S, Mr 223.24, is 0.5 % soluble in water at 25℃ and 3 % soluble at 100 ℃. The sodium, potassium, calcium, and magnesium salts are readily soluble in water but the barium salt is only sparingly soluble. Sulfonation with oleum at 50℃ gives 1- aminonaphthalene-4,7-disulfonic acid. Alkali fusion gives 8-amino-2-naphthol, and Bucherer-type hydrolysis gives 1-hydroxynaphthalene-7-sulfonic acid. | Uses | Intermediate of dyestuff | Uses | 8-Amino-2-naphthalenesulfonic acid can be used as a reactant to synthesize:
- Fe3O4/sulfonated polyaniline composite material via chemical oxidative polymerization with aniline in the presence of magnetite (Fe3O4) nanoparticles.
- Prismatic crystals of strychnine-8-ammonio-2-naphthalenesulfonate-water by heating with strychnine in water/ethanol solvent mixture.
- 5-amino-9-dialkylamino benzo[a]phenoxazine dyes (Nile blue analogs) by condensation with N-alkyl or N-sulfo-propyl 4-arylazo-substituted 3-hydroxyaniline.
| Application | 1-Naphthylamine-7-sulfonic acid can be used as a dye intermediate to prepare dyes such as direct light fast blue B2RL, direct light fast red brown RTL, and sulfur blue CV. |
| 1-Naphthylamine-7-sulfonic acid Preparation Products And Raw materials |
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