91国产自拍在线视频 久久精品视频在线看15 91视频在线观看 曰本a在线天堂 老司机免费精品成人视频在线观看网站
       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..
        More
  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.