DSD acid|p-nitrotoluene-o-sulfonic acid|DNDS acid|ANSD acid-Luoyang Dongyuan Chemical Co.,Ltd.

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4,4’-Diaminostilbene-2,2’-disulfonic acid

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.