Trichloracetic acid, commonly known as TCA, is a highly corrosive organic acid used for various applications in the medical and industrial sectors. It is known for its ability to perform deep peels and is often used in dermatology for skin resurfacing. Some synonyms for TCA include trichloroacetic acid, trichloroethanoic acid, and TCA solution. Other names for TCA used in the chemical industry include trichloroacetic acid monohydrate, trichloroacetate, and perchloroacetic acid. TCA is also used as a weed killer and as a laboratory reagent to precipitate proteins. Despite its common usage, TCA can be dangerous if not handled correctly due to its corrosive nature.