CH2CHCH2SO3H

CH2CHCH2SO3H, also known as allyl sulfonic acid, is an organic compound with the chemical formula C3H6SO3. It is a vinyl sulfonic acid derivative characterized by the presence of an allyl group and a sulfonic acid functional group. The sulfonic acid group (-SO3H) is a strongly acidic moiety, making allyl sulfonic acid a relatively strong acid.

This compound can be synthesized through various methods, often involving the oxidation of allyl mercaptans or the reaction of allyl halides with sulfites. The double bond in the allyl group makes it susceptible to addition reactions, and the sulfonic acid group can undergo typical acid reactions, such as salt formation.

Allyl sulfonic acid and its derivatives find applications as monomers in the synthesis of polymers. These polymers can exhibit unique properties due to the presence of the sulfonic acid groups, which can impart hydrophilicity, ion-exchange capabilities, or act as cross-linking sites. They have been explored for use in areas such as water treatment, dispersants, and specialty resins. Due to its reactive nature, it requires careful handling and storage.