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      av无码东京热亚洲男人的天堂

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                 4,4’-Diaminostilbene-2,2’-disulf..
                 p-nitrotoluene-o-sulfonic acid ..
                 4,4-Dinitrostilbene-2,2-disulfon..
                 Aniline-2,5-disulfonic acid mono..
                 Para Amino Azo Benzene 4 Sulfoni..
                 4-aminobenzene-1,3-disulphonic a..
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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.