N-Methyl Pyrrolidone, Aniline, Adipic Acid manufacturer / supplier in China, offering N-Methyl Pyrrolidone/ CAS No. 872-50-4/ 1-Methyl-2-Pyrrolidone, Industry Grade Propylene Glycol/ CAS No. 57-55-6/ Mono Propylene Glycol, Raw Material for The Production of Highly Elastic Spandex and so on.