This product is a colorless transparent liquid with camphor odor, mp**0 ° C, bp **7 ~ **8 ° C, n*0D 1.***0, relative density 0.**1, fp*6 ° F (*3 ° C), almost insoluble in water, but can form azeotrope with water The product has a boiling point of *7.9 ° C, a water content of *4.3%, and a ketone content of *5.7%, and is miscible with an organic solvent such as phenol, aldehyde, ether or benzene. This product is toxic and vapor irritates the eyes and respiratory tract.