Appearance: Clear, colorless liquid.
Odor: Pungent odor.
pH: 2.38 (0.1M aq soln).
Freezing/Melting Point: 8.4 deg C.
Boiling Point: 101 deg C @ 760.00mmHg.
Relative Density：1.2196 at 20 deg C.
Vapor Density: 1.6 (air=1).
Vapor Pressure: 35 mm Hg @ 20 deg C.
Decomposition Temperature: Not available.
Flash Point: 69 deg C ( 156.20 deg F)
Evaporation Rate: 2.1 (BuOAc=1).
Autoignition Temperature: 434 deg C ( 813.20 deg F)
Explosion Limits, lower: 18 vol %
Explosion Limits, upper: 57 vol %
Solubility in water: Soluble.
Viscosity: Not available.
Molecular Formula: CH2O2
Molecular Weight: 46.03