White crystalline powder, no obvious toxicity; slightly soluble in water, soluble in ethanol, alkali solution; used in the synthesis of dyes, pigment intermediates, especially suitable for the preparation of anthraquinone and azo dyes. Hazard Class: General chemicals; skin irritation
Chinese alias：8-苯胺-1-萘磺酸（苯基周位酸）
English alias：8-Anilino-1-naphthalenesulfonic acid （ANS）
Anthraquinone/azo dye intermediate; used in the synthesis of anthraquinone dyes (such as vat dyes), azo dyes (such as acid dyes), suitable for dyeing cotton and wool fibers, ensure high fastness and color shade stability of dyes
| No. | Item | Grade AAA | Grade A | Grade C |
| 1 | Appearance | Green-brown to brown-green crystals | Green-brown to brown-green crystals | Green-brown to brown-green crystals |
| 2 | N-phenyl-1-naphthylamine-8-sulfonic acid mass fraction | ≥98.00% | ≥97.00% | ≥70.00% |
| 3 | 1-naphthylamine-8-sulfonic acid mass fraction | ≤1.50% | ≤2.00% | ≤2.00% |
| 4 | Aniline mass fraction | ≤0.50% | ≤0.50% | ≤0.50% |
| 5 | 1-naphthylamine-5-sulfonic acid mass fraction | ≤0.50% | ≤0.50% | ≤0.50% |
| 6 | Alkali-insoluble matter mass fraction | ≤0.50% | ≤0.50% | ≤0.50% |
Address: Block B, Interstellar Center, Yuhua District, Shijiazhuang City, Hebei Province
