It is colorless liquid with the ethereal odor. It will change to yellow or even to black when exposed to light. It slight soluble to water, can mix soluble to alcohol, ether,acetone, etc. Solubility in 100g water:0.3, density:0.9132, boiling point:63.2-65.6℃, melting point:-88.68℃, refractive index:1.4320, flash point:-22℃.