N-methyl-pyrrolidone(nmp) Product name: n-methyl-pyrrolidone Cas no: 872-50-4 Chemical formular: c5h9no Molecular weight: 99. 134 Assay: 99. 8% & 99. 5% Appearance: colorless and transparent liquid Density (g/ml) :1.020-1.040 Refractive index n20d:1.4680-1.4695 Boiling point: 202c Flash point: 95c Characteristics: dissolvable in water and many solvents, such as acetaldehyde, ether, acetone, etc. Package: galvanized iron drum of 200kgs net weight Galvanized iron drum of 200kgs net weight