DSD acid, DASDA, 4,4'-Diaminostilbene-2,2'-Disulfonic acid, CAS:81-11-8, china DSD acid, DSD acid manufacturer

D S D ACID

Chemical name:4,4'-Diaminostilbene-2,2'-disulfonic acid or DSD Acid (4:4 Diamino Stilbene 2:2 Disulfonic Acid, DASDA)
CAS:81-11-8
Structural Formula:

Molecular Formula:C14H14N206S2
Molecular Weight:370.4
Physical and chemical properties:
1)Light yellow paste or powder, soluble in alcohol and ether ;insoluble in water, easily dissolved in alkaline solution.
2)Easily oxidated to red in air, it has properties of aromatic acid and amine.

DSD Acid Specifications:

Items	Index of quality
Appearance	Moist Product	Dry Product
Appearance	Light yellow paste	Light yellow power
Total Amino Value	47%	95%
Benzyl Matter(on basis of 100% DSD acid), max.	0.25	0.25
Matter Insoluble in Alkali (on basis of 100% DSD acid), max.	0.05	0.05
Chromaticity, max.	0.20	0.1
Content of Ash %, max.		2.0

DSD Acid Main use:
Used in manufacture of fluorescent whitening agent.
Direct Chrysophenine G.
Direct yellow R and used as insecticide ect.

Succinonitrile

Pymetrozine

Side chain for biapenem

Side chain for meropenem

Chlorinated Polyethylene 135

Tris(dimethylaminomethyl)phenol

4,4'-Diaminostilbene-2,2'-disulfonic acid

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