FWA ER-I by Dalian Richfortune Chemicals is a bisdiphenylethylene class optical brightener available in yellowish-green crystalline solid form. It is a non-toxic, odorless, & non-ionic grade... view more

FWA KCB by Dalian Richfortune Chemicals is a blue bright shade naphthalene-benzoxazole class optical brightener. It is insoluble in water but soluble in most organic solvents. It shows maximum UV... view more