Primary Plasticizer, Secondary Plasticizer, DOP manufacturer / supplier in China, offering Tma Best-Selling Export Supplier High Quality Trimellitic Anhydride Tma CAS 552-30-7 Manufacturer, Trimellitic Anhydride with Manufacturer Direct Selling CAS 552-30-7 for PVC Plasticizer, Chemical Name Tma Copolymer Trimellitic Anhydride CAS No. 552-30-7 Tma 1, 2, 4-Benzeneticarboxylic Anhydride and so on.