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ocba(c7h5clo)o-chlorobenzaldehyde molecular formula: c7h5clo molecular weight:140.57 melting point:9-11 °c(lit.) index of refraction: 1.585 molar refractivity: 37.9 cm3 molar volume: 113 cm3 polarizability: 15.02 10-24cm3 surface tension: 42.2 dyne/cm density: 1.243 g/cm3 flash point: 85 °c enthalpy of vaporization: 44.82 kj/mol boiling point: 211.9 °c at 760 mmhg vapour pressure: 0.178 mmhg at 25°c free acid: 1.0% max. insoluble matter in acid: 0.1% max. density: 1.248 it's sensitive to air and light.avoid incompatible materials, exposure to air, exp