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trichloroacetic acid
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trichloroacetic acid

chemical compound
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Quick Summary

Trichloroacetic acid (TCA) is a strong, pungent acid with the chemical formula C₂Cl₃HO₂. It is classified as a carboxylic acid, a group of compounds known for their acidity due to their ability to donate a hydrogen ion.12

TCA is notably stronger than many other carboxylic acids, with an acid strength comparable to hydrochloric acid. This enhanced acidity is due to the presence of three chlorine atoms, which are electron-withdrawing groups. These groups increase the stability of the resulting carboxylate ion, making the acid more potent.2

Historically, TCA has been used as a caustic and astringent in medicine, and it also finds application in weed control.1

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2 Britannica Sources
  1. trichloroacetic acid
  2. carboxylic acid - Acidity

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