Model number: Optical brightening agent CBS-X Optical brightening agent CBS-X Chemical name Stilbene derivative  C.I.No. 351 CAS.No. 27344-41-8 Molecular Formula C28H20S2O6Na2 Molecular weight 838 Appearance Yellow crystallized powder  Fluorescence strength(compare with standard) 100? Moisture,% 5 Application Mainly be applied for whitening process of synthetic detergent, fancy soap and soap, as also be used for that of cotton-jute fiber, polyamide fiber and wool and paper.