Physical and chemical properties: colorless oily flammable liquid. Boiling point 188 ° C (decomposition). Freezing point is -26.8 °C. Specific gravity (20/4 ° C) 1.3322. Flash point 83 ° C, soluble in ether, acetone, aromatic hydrocarbons, slightly soluble in carbon disulfide, aliphatic hydrocarbons and water.
Uses: dimethyl sulfate is used in the manufacture of dimethyl sulfoxide, caffeine, codeine, vanillin, aminopyrine, trimethoprim and pesticide acephate. It can replace halogenated alkane as a methylating agent in organic synthesis such as pesticides, dyes, and perfume industries.