NMP is widely used in aromatics extraction, acetylene, alkene, diene purification, but also for the polymer solvents. N- ... EINECS: 212-828-13. Use: Widely used in aromatics extraction, acetylene, alkene, diene purification, but also for the polymer solvents and ... .040g/cm3Appearancecolorless or light yellow liquidContent≥99%Water≤0.5% High purity 99% N-methyl-pyrrolidone