4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid

DSD acid (supply) 1>Amino value(dry):95.0%min 2>Used in the manufacture of dyestuffs 3>FWA,Chrysophenine G,Direct Yellow R Product name: DSD acid Chemical name: 4,4-Diaminostilbene-2,2-disulfonic acid                 Chemical formula: C14H14N2O6S2Molecular weight: 370.4 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)%	95.0min.
(3)Degree of pigmentation(EOD)	0.15max.
(4)Content of alkali insolubles (gross cream )%	0.08max.
(5)Benzyl compound(gross sample)%	0.25max.
(6)Ash content%	2.5max.

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.

4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid