Dimethyl sulfate is a colorless, oily liquid with a strong, unpleasant odor. It is an organic compound that contains sulfur and is primarily used as a methylating agent in chemical reactions. Due to its reactivity, it is often utilized in the production of various chemicals, including pharmaceuticals and pesticides. However, dimethyl sulfate is highly toxic and can cause severe health issues if inhaled or absorbed through the skin. It is classified as a hazardous substance, and safety precautions are essential when handling it. Proper protective equipment and ventilation are necessary to minimize exposure risks.