Fluorescent brightener CBS-X (C.I.351) Chemical name: 2,2'-([1,1'-Biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonic acid disodium salt CAS Number: ¡¡ 27344-41-8 Technical conditions: Appearance: Yellow solid powder. Color light: Slight-colored blue fluorescent light (approximate to the standard sample) Use: Mainly used in increasing whiteness of cellulose fiber, PA, azelon, cotton and extensively used in synthetic washing powder. The effects of being brightened cotton by this consistency products are 2.7 times as big as fluorescent brightener of diphenyle-thene double triazine. 25kg/drum.