Trimethylamine is a volatile, colorless organic compound. It has a strong, fishy odor and is classified as a tertiary amine. Trimethylamine is produced industrially through the reaction of formaldehyde with methylamine or by the methylation of ammonia. It is used in various applications, including as a precursor for pharmaceuticals, agrochemicals, and other chemicals. In addition, trimethylamine serves as a catalyst in some chemical reactions and is found in certain natural processes, such as the metabolism of choline in animals. Its pungent smell and chemical reactivity make it important in both industrial and research contexts.