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DSD Acid (81-11-8)

Chemical name:4,4’-Diaminostilbene-2,2’-disulfonic acid
Structural formula:
 
Chemical formula: C14H14N2O6S2     
Molecular weight: 370.4
CAS NO.:81-11-8
Property:
1)Light yellow cream or powder, soluble in ethanol and ether; insoluble in water, easily soluble in alkaline solution.
2)Can be easily oxidized into red; has the property of aromatic acid or aromatic amine
Quality index:

Item

Index

(1)Appearance dry/wet

light yellow powder/light yellow cream

(2)Dry product total amino value(gross dry sample)%　　

≥95.0

(3)Degree of pigmentation(EOD)　　　　　　　　　　　　

≤0.12

(4)Content of alkali insolubles (gross cream )%　　　

≤0.08

(5)Benzyl compound(gross sample)%　　　　　　　

≤ 0.25

(6)Ash content%　　　　　　　　　　　　　　　　

≤2.2

Main use:In the manufacture of fluorescent brighteming agent、Chrysophenine G and Direct Yellow R, also as pesticides

Packing: dry product: in 25kg woven bags or upon clients' request; wet product: in 40kg woven bag or upon clients' request.