1,4-bis-(p-Cyanostyryl)benzene

brightener er for dacron ; 1,4-bis(2-cyano styryl)benzene 99+% ; palanib-riliantweiss r, blankophor er ; fluorescent brightener 199 ; 1,4-bis(4-cyanostyryl)benzene ; fluorescent whitening agent er ; 1,4-bis(4-cyanostyryl)benzene ,98% ; optical brightener 199 ; optical brightener er-i(c i 199) ; c.i.199