Name: N-Methyl-2-pyrrolidone
Registry Number: 872-50-4
Formula: C₅H₉NO
Other Names: 1-Methyl-2-pyrrolidinone; 1-Methyl-5-pyrrolidinone; 1-Methylazacyclopentan-2-one;
Molecular Weight: 99.13106 g/mol
Density: 1.029 g/cm³
Melting Point: −24 °C(lit.)
Boiling Point: 202 °C at 760 mmHg
Flash Point: 86.1 °C
Surface Tension: 33.7 dyne/cm
Enthalpy of Vaporization: 43.82 kJ/mol
Vapour Pressure: 0.299 mmHg at 25°C
XLogP3: -0.5
H-Bond Acceptor: 1
Tautomer Count: 2
Exact Mass: 99.068414
MonoIsotopic Mass: 99.068414
Topological Polar Surface Area: 20.3
Heavy Atom Count: 7
Complexity: 90.1
Storage temp.:  2-8°C
Water Solubility:  >=10 g/100 mL at 20 ºC
Sensitive: Hygroscopic