Chemical name 4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid
MF C14H14N2O6S2
MW 370.4
CAS NO: 81-11-8
Quality index: Items Index of quality
Appearance Moist Product Dry Product
Light yellow paste Light yellow power
Total Amino Value(on total paste basis), min. 47%
Total Amino Value of Dry product(on total sample basis), min. 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

Property: 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.
Use: Used in manufacture of fluorescent whitening agent.Direct Chrysophenine G.Direct yellow R and used as insecticide ect.
Packing: For powders: 25kg net poly-woven bags or as the customers requirements.
For paste: 40kg net poly-woven bags or as the customers requirements.
Transport: Avoid impact or rain.