Physical State: Clear liquid Appearance: APHA: 10 max Odor: ammonia-like Vapor Pressure: 478 mm Hg @ 20 deg C Viscosity: 0.3 mPa.s @20 deg C Boiling Point: 33 - 34 deg C Freezing/Melting Point: -101 deg C Autoignition Temperature: 400 deg C ( 752.00 deg F) Flash Point: -37 deg C ( -34.60 deg F) Explosion Limits, lower: 2.30 vol % Explosion Limits, upper: 10.40 vol % Decomposition Temperature: Solubility in water: Soluble. Specific Gravity/Density: .6940