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
