Adipic Acid, Propylene Glycol, Maleic Anhydride manufacturer / supplier in China, offering Trimethylolpropane Tmp CAS 77-99-6 – High Purity Industrial Grade, CAS 107-15-3 Ethylenediamine - Water Treatment & Dye Intermediate, Ethylenediamine Anhydrous 99% for Adhesives & Specialty Chemicals and so on.