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DSD acid4,4'-Diaminodiphenylethylene-2,2'-disulfonic acidCAS No: 81-11-8 EINECS No: 201-325-2
Chemical name:4,4'-diamino-stilbene-2,2'-disulphonic acid
Molecular formula:C14H14N2O6S2
Properties: Appearance with light yellow paste or powder. It is easy to dissolve in alcohol, ether and alkali, but not in water. Also, it is apt to be oxidized to show red colour and have the nature of fragrant acid..
Uses: dsd acid is mainly used in intermediates of fluorescer and varieties dyes.
Packing:25kg or 40kg woven bag or following your demand.
Quality index:
| Item | Index |
| Appearance | light yellow powder |
| Total amino group value | 95% min |
| Benzyl matter | 0.25% max |
| Insoluble matter in alkali | 0.1% max |
| Moisture | 2% max |
| Chroma | 9°max |
DSD acid (4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid)