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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.
Manufacturing
