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        DSD Acid (81-11-8)

        Chemical name:4,4’-Diaminostilbene-2,2’-disulfonic acid
        Structural formula:
         
        Chemical formula: C14H14N2O6S    
        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.





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