The trichloroacetic acid formula, also called as Aceto-caustin formula or Trichloro ethanoic acid formula is explained in this article. It's a monocarboxylic acid where all 3 methyl hydrogens that can be substituted by chlorine (Cl). The molecular formula of Trichloroacetic acid is C2HCl3O2.Trichloro ethanoic acid is a colorless crystalline solid. It has the ability to absorb moisture from the air and to form the syrup. It dissolves in water and it releases heat. It's synthesized by reacting chlorine with acetic acid using a suitable catalyst. It can also be prepared by oxidizing trichloroacetaldehyde.