N-vinylpyrrolidone basic information Chinese name: N-vinylpyrrolidinone Chinese alias: N-vinyl-2-pyrrolidinone; N-vinylpyrrolidinone; vinylpyrrolidinone; vinylpyrrolidinone (NVP); n-ethyl-2-pyrrolidinone; English name: N-Vinyl-2-Pyrrolidinone English alias: 2-Pyrrolidinone , 1-ethenyl-; N-vinyl-2-pyrrolidone; CAS No.: 88-12-0 Molecular formula: C6H9ON Molecular weight: 111.14200 Physical properties data 1. Properties: colorless liquid. Easy polymerization into polyvinylpyrrolidone. 2. Density (g/mL,25/4℃): 1.043. Relative vapor density (g/mL, air=1): Not determined4. Melting point (02C): Undetermined 5. Boiling point (02C, normal pressure): undetermined 6. Boiling point (02C): 148℃ (13.33kPa) 7. Index of refraction: 1.51208. Flash point (02C): 989. Solubility: miscible with water, ethanol and other organic solvents, easy to copolymerize with other ethylene compounds.