White powder, slightly irritating; soluble in hot water, alkali solution, slightly soluble in ethanol; used in the synthesis of reactive dye and acid dye intermediates, improve the binding force between dye and fiber. Hazard Class: General chemicals; skin irritation
Chinese alias：2-氨基-4-[(2-羧基苯基)磺酰基]苯酚
English alias：2-Amino-4-[(2-carboxyphenyl)sulfonyl]phenol
Special intermediate for reactive dyes; used in the synthesis of high binding force reactive dyes, suitable for dyeing cellulose fibers such as cotton and hemp, enhance the covalent combination between dye and fiber, improve washing fastness and color fastness
| No. | Item | Premium Grade | Qualified Grade |
| 1 | Appearance | Milky white to light brown crystalline powder | Light brown to brown crystalline powder |
| 2 | Assay | ≥ 98.5% | ≥ 97.0% |
| 3 | Amino value | ≥ 98.0% | ≥ 96.5% |
| 4 | Water content | ≤ 1.0% | ≤ 2.0% |
| 5 | Acid-insoluble matter | ≤ 0.1% | ≤ 0.2% |
| 6 | Major single impurity(such as 2-aminophenol,o-aminobenzoic acid,sulfonylaniline isomers) | ≤ 0.5% | ≤ 1.0% |
| 7 | Melting point | ≥ 205 °C | ≥ 202 °C |
Address: Block B, Interstellar Center, Yuhua District, Shijiazhuang City, Hebei Province
