Sell D S D ACID

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D S D ACID
Chemical name:4,4'-Diaminostilbene-2,2'-disulfonic acid
Commodity name:DSD Acid
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 :
1> Moist Product
Appearance: Light yellow paste
Total Amino Value(on total paste basis) , min. :47%
Total Amino Value of Dry product(on total sample basis) , min. -
Benzyl Matter(on basis of 100% DSD acid) , max. :0.25
Matter Insoluble in Alkali (on basis of 100% DSD acid) , max. :0.05
Chromaticity, max. :0.20
Content of Ash %, max. -
2> Dry Product
Appearance :Light yellow power
Total Amino Value(on total paste basis) , min. -
Total Amino Value of Dry product(on total sample basis) , min. :95%
Benzyl Matter(on basis of 100% DSD acid) , max. :0.25
Matter Insoluble in Alkali (on basis of 100% DSD acid) , max. :0.05
Chromaticity, max. :0.1
Content of Ash %, max. :2.0
DSD Acid Main usage:
Used in manufacture of fluorescent whitening agent.
Direct Chrysophenine G.
Direct yellow R and used as insecticide ect.
DSD Acid 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.