Dyes & Pigment intermediates DSD Acid

HeBei Hua-chem Group
--ProductIntroduction
4,4'-DIAMINOSTILBENE-2,2'-DISULFONIC ACID

CAS 81-11-8

Physical and chemical properties:
1)Light yellow paste or powder,soluble in alcohol and ether insoluble in water,
readily soluble in a aqueous solution of alkali
2)Easy be oxidated to red in air,it has properties of aromatic acid and aromatic amine

Appearance light yellow paste or powder

Contents of Amino(On tltal paste basis)% ?5.0%min

Contents of dry products(On basis of total dried sample)95.0%min

Insoluble in Aikali(On total paste basis)
0.08%max

Insoluble in Alkali(On basis of dried sample) 0.10%max

Benzyl(On basis of total sample)0.25max

Main usageÿºUsed in manufacture of fluorescent whitening agent.Direct Chrysophenine G.Direct yellow R and used as insecticide.

PackingÿºFor powder:25Kg net poly-woven bags or as the customers' requirements. For paste:40Kg net poly-woven bags oras the customers' requirements.