Hydroxyethylsulfonic Acid, also known as HESA, is a chemical compound widely used in various industries due to its versatile properties. When it comes to synonyms for this compound, a few alternatives come to mind. One common synonym is HES acid, which is a shorter and more informal way to refer to Hydroxyethylsulfonic Acid. Another synonym is 2-Hydroxyethylsulfonic Acid, which highlights the presence of the hydroxyl and ethyl functional groups in the compound. Additionally, Ethyl hydroxysulfonate can also be considered a synonym for Hydroxyethylsulfonic Acid, emphasizing the presence of ethyl group in the molecule. These synonyms offer flexibility and convenience in referring to this important chemical compound.