What is another name for ethanoic acid?

Ethanoic acid is commonly known as acetic acid. This is the systematic IUPAC name for the compound, which consists of two carbon atoms, four hydrogen atoms, and two oxygen atoms (chemical formula CH₃COOH). Acetic acid is the main component of vinegar and is known for its distinctive sour taste and pungent smell.

Acetic acid is widely used in various applications, including as a food preservative, in the manufacturing of various chemicals, and in the food industry. The name 'acetic acid' is derived from the Latin word 'acetum,' meaning vinegar. This reinforces the connection between ethanoic acid and its well-known use.

In contrast, the other options represent different compounds with unique chemical structures and properties. Formic acid is the simplest carboxylic acid, citric acid is a tricarboxylic acid found in citrus fruits, and propanoic acid is a three-carbon carboxylic acid. Each of these has distinct characteristics and uses, making they different from ethanoic acid, which is why acetic acid is recognized as its alternative name.