Shandong Qingyun Changxin Science-tech., Ltd is a large-scale chemical entity enterprise specializing in the manufactoring and trade of 1-Methyl-2-pyrrolidinone(NMP) and GBL series. Equipped with the combination unit of 10, 000 T/A GBL and 10, 000 T/A of 1-Methyl-2- pyrrolidinone, we now are the biggest and most leading hi-tech manufacturer of GBL and NMP in Chona, with the lowest cost and best quality. Now, our products are widely used in the production of PCB printed circuit board and TFT-LCD liquid crystal material, the cleaning of IC semiconductor, or used as top-grade and environmrnt-friendly solvent in lithium ion battery industry, electronic insulating materials, top-grade coating, drug, pesticide, dyes, sparingly soluble engineering plastic and refining of petrochemical industry, etcNMP: CAS:872-50-4 Purity:99.9min ; Moisture:0.02max; Chroma:10maxGBL: Purity:99.5min; Moisture:0.05max Chroma:15max