If you mean elements, there are six members of the halogen family; fluorine, chlorine, bromine, iodine, astatine, and element 117. Element 117 has not yet been officially named. It is currently called ununseptium, Uus, which means 117.
The halogen family is probably the answer- as hypochlorites (household bleach) and chlorine dioxide are commonly used. Many other non halogen compounds are disinfectants such as phenol, C6H5OH, potassium peroxymonosulfate, are also disinfectants- the halogen family does not have a monopoly.