Product name:Optical Brightener CBS-X 
Synonyms : 

2,2'-((1,1'-biphenyl)-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonicaci; 2,2'-([1,1'-biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonicacidi; 2,2'-(4,4'-biphenylylenedivinylene)di-benzenesulfonicacidisodiumsalt; Benzenesulfonicacid,2,2'-[(1,1'-biphenyl)-4,4'-diyldi-2,1-ethenediyl]bis-,disodiumsalt;disodium4,4'-bis(2-sulfostyryl)biphenyl;  tinopalcbs; fluorescent brightener cbs-x;   disodium 2,2'-[biphenyl-4,4'-diyldi(E)ethene-2,1-diyl]dibenzenesulfonate;disodium 2,2'-[biphenyl-4,4'-diyldi(Z)ethene-2,1-diyl]dibenzenesulfonate;  4,4'-Bis-(2-sulfostyryl)-biphenyl disodium salt;   Optical Brightening Agent CBS-X;  Optical Brightner CBS-X;