1.Chemical Name: para--nitrio toluene--ortho--sulfonic acid
2. Usage: It is mainly used as intermediates of the dyes.
3. Packing: iron drum lined with PVC membrane
4. N.W: 25kg
5. Quality Standard:
| Ztem | Zndex |
| appearance | gray white crystal |
| purity | >=70% |
| insolubles | <=0.1% |
DNS acid
Brief introduction
1. Chemical Name: 4,4'--dinitro stibene--2,2' disulphonic acid
2. Uses: It is mainly used as intermediates of the dyes.
3. Packing: iron drum lined with PVC membrane
4. N.W: 25kg
5. Quality Standard:
| Item | Index |
| appearance | brown yellow crystal |
| purity | >=60% |
| purity of dry sample | >=90% |
| benzyl | <=0.5% |
| insolubles | <=0.5% |
DSD acid
Brief introduction
1. Chemical Name: 4,4'--diamino--stilbene--2,2'--disulphonic acid
2. Molecular Formula: C
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