Beijing FLY Science and Technology Co., Ltd

Beijing FLY Science and Technology Development Co., Ltd.In the world, We are one of the largest manufacturers of fluorescent brightener SWN (C.I.140), Fluorescent Brightener 199 series (ER-330, EB-330), fluorescence brightener 4BK and cyano-benzaldehyde chemical intermediates (o-cyano-benzaldehyde CAS :7468-67-9, m-cyano-benzaldehyde CAS :24964-64-5, p- cyano-benzaldehyde CAS: 105 -- 07-7), and 7 - hydroxy -4 ?methyl-coumarin (CAS :90-33-5). [详细介绍]