HO2Cl refers to chlorous acid, an intermediate strength oxyacid that contains both chlorine and oxygen atoms. It is used as a bleaching agent and for water treatment.
Related terms
Chlorite ion (O2Cl⁻): The conjugate base of chlorous acid, which is more stable and less acidic.
HBrO3 (bromic acid): A stronger oxyacid than chlorous acid, formed when bromine trioxide dissolves in water.
HIO3 (iodic acid): Another stronger oxyacid than chlorous acid, resulting from iodine pentoxide dissolving in water.