... FCL 4,Maleic Anhydride /108-31-6 5,purity:99.5% ITEM: Maleic Anhydride1,Cas No: 108- ... binary acid with four carbons, 1,4-butanediol r-butyrolactone, tetrahydrofuran 5,Packing: 25kgs per plastic woven ... 52.452.53Ash%≤0.0030.002Iron PPM ≤51.2 1,productsTangshan Baotie Coal & Chemical Co., Ltd. (Baotie ... . We built a maleic anhydride plant in2006, a water reducer plant in 2007, and a dinaphthol plant in ...