Adipic Acid, Propylene Glycol, Maleic Anhydride manufacturer / supplier in China, offering 99.9% Purity Phthalic Anhydride Flakes – CAS 85-44-9 for Plasticizer & Resin Production, Phthalic Anhydride PA for DOP/DINP Plasticizers – Raw Material of PVC Products, Customized Phthalic Anhydride – Various Packaging PA Available and so on.