Synonyms: 2-Pyrrolidone; Butyrolactam Molecular Formula: C4H7NO Molecular Weight: 85.1 Linear Structural Formula: C4H7NO MDL Number: MFCD00005270 Purity: 99% Melting Point: 23-25 C (lit.) Density: 1.12 g/mL at 25 C (lit.) Refractive Index: …