Butyl Mercaptan is a colorless liquid with a strong, unpleasant odor, often described as similar to rotten cabbage. It is a type of mercaptan, which is a class of organic compounds containing sulfur. Butyl mercaptan is primarily used in the production of rubber and as an odorant in natural gas to help detect leaks. This compound is also utilized in the synthesis of various chemicals and as a flavoring agent in some food products. Due to its strong smell, it is important to handle butyl mercaptan with care, as exposure can cause irritation to the eyes, skin, and respiratory system.