Physical properties 1.Appearance:A colorless, strong excitant odour gas.With ether odor smell 2.Solubility:soluble in water, alcohol and ether 3.Formula:CH2O 4.Boiling point (101kPa):-19.5°C 5.Freezing point :-118°C 6.Density : 1.083 7.Refractive index:1.3755 8.Flash point :60°C USE Formaldehyde is very extensive used insynthetic resin, surfactants, plastic, rubber, leather, paper, dyestuff, pharmaceutical, pesticide, photographic film, explosives, building materials and disinfection