Pale yellow crystals, irritating; soluble in water, ethanol, alkali solution; used in the synthesis of dyes, pharmaceutical intermediates, also as sulfonation reagent in organic synthesis. Hazard Class: Class 6.1 dangerous goods; toxic.
Chinese alias：对硝基氯苯邻磺酸 （2-氯-5-硝基苯磺酸）
English alias：2-Chloro-4-nitrobenzenesulfonic acid；4-Nitro-2-chlorobenzenesulfonic acid
Dye/pharmaceutical intermediate; used in the synthesis of dyes (such as azo dyes, acid dyes), pharmaceuticals (such as anti-inflammatory drugs), also as sulfonation reagent in organic synthesis (introduce sulfonic acid group), enhance product water solubility
| No. | Item | Specification |
| 1 | Appearance | Light brown to yellowish brown crystalline powder, slight caking acceptable |
| 2 | Purity | ≥97.0% |
| 3 | Content (dry basis) | ≥96.5% |
| 4 | Moisture | ≤1.0% |
| 5 | Ash | ≤0.2% |
| 6 | pH value | 1.0–2.5 |
| 7 | Iron (Fe) | ≤0.003% |
| 8 | Heavy metals | ≤0.002% |
| 9 | Insoluble matter | ≤0.1% |
| 10 | Melting point | ≥300°C |
Address: Block B, Interstellar Center, Yuhua District, Shijiazhuang City, Hebei Province
