DASDA
Product name: DASDA
Chemical name: 4,4′-Diamino-2,2′-stilbenedisulfonic acid; DSD Acid;
CAS: 81-11-8
Synonys: DSD Acid
MW: 370.4
MF: C14H14N2O6S2
Use: It is mainly used as intermediate of dyes.
Package: 25kg plastic woven bag
Specifications of DASDA:
| Items | Standards | Results |
| Appearance | white powder | comply |
| Content | 95% | 95.6% |
| Moisture | 0.5% | 0.35% |
| Ash | 0.5% | 0.38% |
| pH | 5-8 | 6 |
Introduction of DASDA:
Producers are mainly concentrated in China and India.
Yellow needle like hygroscopic crystal. Very slightly soluble in water, soluble in ethanol and ether, easily soluble in alkali solution. Use: it is used to produce fluorescent brightener, direct frozen yellow G and direct yellow R, and it is also used as intermediate of pesticide use dye, fluorescent brightener, etc.
A Chinese factory withdrew from production after an explosion in Xiangshui Tianjiayi, China. The company previously had a market share of about 17%. The price of the product has soared since then. Until the outbreak of the novel Coronavirus, worldwide demand weakened and prices fell sharply.
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