C3H9ClS is a chemical compound known as chloropropyl mercaptan. It consists of three carbon atoms, nine hydrogen atoms, one chlorine atom, and one sulfur atom. This compound is often used in the production of various chemicals and can be found in some industrial applications. The presence of the chlorine and sulfur atoms in C3H9ClS gives it unique properties, making it useful in organic synthesis. It is important to handle this compound with care due to its potential toxicity and environmental impact.