C.I.40647

Blankophor G

C.I.Fluorescent Brightener 40

4,4'-Bis(6-sodiosulfo-2H-naphtho[1,2-d]triazol-2-yl)stilbene-2,2'-disulfonic acid disodium salt

2,2'-[1,2-Ethenediylbis(3-sodiosulfo-4,1-phenylene)]bis(2H-naphtho[1,2-d]triazole-6-sulfonic acid sodium) salt