Trimethylamine

"Trimethylamine is an organic compound with the formula N(CH₃)₃. This colorless, hygroscopic, and flammable tertiary amine has a strong "fishy"odor in low concentrations and an ammonia-like odor at higher concentrations. It is a gas at room temperature but is usually sold in pressurized gas cylinders or as a 40% solution in water."

"Trimethylamine is a product of decomposition of plants and animals. It is the substance mainly responsible for the odor often associated with rottingfish, some infections, and bad breath. It is also associated with taking large doses of choline and carnitine."

"Trimethylamine is a nitrogenous base and can be readily protonated to give trimethylammonium cation. Trimethylammonium chloride is a hygroscopic colorless solid prepared from hydrochloric acid. Trimethylamine is a good nucleophile, and this reaction is the basis of most of its applications."