4,4' Diaminostilbene 2,2' Disulfonic Acid (Dasda)

Our company is well recognized manufacturer, exporter and trading of premium quality assortment of 4,4' Diaminostilbene 2,2' Disulfonic Acid (DASDA) in Zhengzhou, Henan, China.

CAS NO:81-11-8
EC NO:201-325-2
Molecular Formula:C14H14N2O6S2
Molecular Weight:370.4008
Specification:
InChI:InChI=1/C14H14N2O6S2/c15-11-5-3-9(13(7-11)23(17,18)19)1-2-10-4-6-12(16)8-14(10)24(20,21)22/h1-8H,15-16H2,(H,17,18,19)(H,20,21,22)
Product description:
Chemical name:4,4a -Diaminostilbene-2,2a -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)% : a Y95.0
(3)Degree of pigmentation(EOD) : a 0.12
(4)Content of alkali insolubles (gross cream )% : a 0.08
(5)Benzyl compound(gross sample)% : a 0.25
(6)Ash content% : a 2.2

Main use: In the manufacture of fluorescent brightening 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.