Fluorescent Brightener 1 Fluorescent Brightener 251 fluorescent whitening agent SWN fluorescent whitening agent DMS sodium 4-(2H-naphtho[1,2-d]triazol-2-yl)stilbene-2-sulphonate Fluorescent Brightener 101 Disodium 4,4'-bis(2-sulfostyryl)biphenyl Fluorescent Brightener KS-N Liquid fluorescent whitening agent Fluorescent brightener AMS Fluorescent brightener SPS Fluorescent brightener SF-B Fluorescent whitening agent MST ER-1 Fluorescent Brightener fluorescent whitening agent PRS Paper fluorescent brightener Fluorescent brightener JPS Fluorescent brightener CEF