Product name:Optical Brightener CBS-X Appearance: green yellowish crystal powder Chemical name: 4.4-bis(2-disulfonic acid styryl) biphenyl CAS No.: 27344-41-8 Structural No.: C.I.351 Molecular formula: C28H20S2O6Na2 Structural formula: Molecular weight: 562.6 Appearance: green yellowish crystal powder 1% Extinction index: 1105-1181 Applications:Optical Brightening Agent CBS-X can be used in detergent industry and soap industry. Package: Packed in 25kgs fiber drum with double PE liners, or according to customers' request.