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                                 4,4’-Diaminostilbene-2,2’-disulf..
                                 p-nitrotoluene-o-sulfonic acid ..
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                            Products

                          Chemical name:4,4’-Diaminostilbene-2,2’-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)   ≥ 95.0%
                          (3)Degree of pigmentation(EOD)             ≤ 0.12
                          (4)Content of alkali insolubles (gross cream )    ≤ 0.08%
                          (5)Benzyl compound(gross sample)       ≤ 0.25%
                          (6)Ash content                ≤ 2.2%

                          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.