White crystalline powder, no obvious toxicity; easily soluble in water, insoluble in organic solvents; an important reactive dye intermediate, used in the synthesis of double reactive group dyes, improve the dyeing fastness and level dyeing of dyes. Hazard Class: General chemicals; skin irritation
Chinese alias：2,4-二氨基苯磺酸钠 （间双钠盐）
English alias：Sodium m-phenylenediamine-4,6-disulfonate；1,3-Phenylenediamine-4,6-disulfonic acid disodium salt
Core intermediate for reactive dyes; used in the synthesis of double reactive group reactive dyes, suitable for dyeing cellulose fibers such as cotton and hemp, enhance the reaction activity between dye and fiber, improve washing fastness and dyeing uniformity
| No. | Test Parameter | Specification |
| 1 | Appearance | White to light yellow crystalline powder, slight caking acceptable |
| 2 | Purity | ≥99.0% |
| 3 | Dry basis content | ≥98.5% |
| 4 | Moisture | ≤0.8% |
| 5 | Ash content | ≤0.2% |
| 6 | pH value | 6.8–8.2 |
| 7 | Iron (Fe) | ≤0.003% |
| 8 | Heavy metals (as Pb) | ≤0.002% |
| 9 | Insoluble matter | ≤0.1% |
Address: Block B, Interstellar Center, Yuhua District, Shijiazhuang City, Hebei Province
