Chemical name: 4,4-Diaminostilbene-2,2-disulfonic acid
Commodity name: DSD Acid
Molecular Formula: C14H14N2O6S2
Molecular Weight: 370.4
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.
Specifications:
1) Appearance: Light yellow powder or paste
2) Total drying Amido Value % ≥ 95.0
3) Benzyl Content % ≤ 0.25
4) Alkali Insolubility % ≤ 0.1
5) ∑OD ≤ 0.1
6) Ash content % ≤ 1.5

Main Usage: Used in the manufacture of fluorescent whitening agent, direct dyes, reactive dyes, and used as sect preventive etc
Packing: For powders 25kg net poly-woven bags or as the customers requirements.