DSD ACID / for Fluorescent Brightener Intermediates

1.4,4'-Diaminostilbene-2,2'-Disulfonic acid 2. Dyes intermediates for Fluorescent Brightener 3. Manufacturer

1,Chemical name : 4,4'–Diaminostilbene–2,2'–Disulfonic acid

2,Commodity name : DSD ACID

3,Structural Formula      :                        

4,Molecular Formula : C14H14N2O6S2

5,Molecular Weight : 370.4

6,Plysical and chemical properties :

   (a)Light yellow paste or powder , soluble in alcohol and ether ,Insoluble in water.

   (b)Easy to be oxidized red in air .There is similar properties with aromatic acid and amine .

7,Specifications :

Item	Moist products	Dry products
Appearance	Light yellow paste	Light yellow powder
Gardner color ≤	10	9
Total Amino Value≥	54%	95%
Matter Insolubles≤	0.05%	0.08%
Benzyl Matter≤	0.25%	0.25%
Fe (ppm)≤	50	60

Remarks : To be manufactured according to customer's specifications.

8,Uses:Dyes intermediates to produce Fluorescent whitener , paper ,direct dyes.

Reative dyes and used as insecticide ect .

9,Packing : 25kg/450kg/500kg/bag or at customer's option .

DSD ACID / for Fluorescent Brightener Intermediates