White crystals, no obvious toxicity; soluble in water, ethanol, alkali solution; a dye and pharmaceutical intermediate, used in the synthesis of acid dyes, reactive dyes, also in the synthesis of sulfonamide drugs. Hazard Class: General chemicals; skin irritation
Chinese alias：
English alias：2-Aminophenol-4-sulfonamide；4-Sulfamoyl-2-aminophenol
Dye/pharmaceutical intermediate; used in the synthesis of acid dyes (such as wool dyeing dyes), reactive dyes, also as raw material for sulfonamide drugs (such as antibacterial drugs), improve product functionality and biological activity
| No. | Item | Premium Grade | Qualified Grade |
| 1 | Appearance | Gray-white crystalline powder, free from mechanical impurities | Light brown crystalline powder, no obvious mechanical impurities |
| 2 | Main content | ≥98.0% | ≥96.0% |
| 3 | Amino value | ≥97.5% | ≥95.5% |
| 4 | Moisture content | ≤1.0% | ≤2.0% |
| 5 | Acid-insoluble matter | ≤0.1% | ≤0.2% |
| 6 | Main individual impurities (e.g., 2-aminophenol, sulfonamide isomers) | ≤0.5% | ≤1.0% |
| 7 | Melting point | ≥198°C | ≥195°C |
Address: Block B, Interstellar Center, Yuhua District, Shijiazhuang City, Hebei Province
