Dichloramine is a reactive inorganic compound with the chemical formula NHCl2.

This yellow gas is unstable and reacts with many materials.

[1] It is formed by a reaction between ammonia and chlorine or sodium hypochlorite.

It is a byproduct formed during the synthesis of monochloramine and nitrogen trichloride.

Dichloramine can be prepared by a reaction between monochloramine and chlorine or sodium hypochlorite:[1] Dichloramine reacts with the hydroxide ion, which can be present in water or comes from water molecules, to yield nitroxyl and the chloride ion.