Silver subchloride, Ag₂Cl

When silver subfluoride is heated with phosphorus trichloride at 140° C., silver subchloride, Ag₂Cl, is formed. It is also a product of the interaction of Silver nitrate and cuprous chloride, of a colloidal solution of silver and chlorine-water, and of silver-foil and weak oxidizers such as cupric chloride.

The product of these reactions is a brown powder, but it is doubtful whether that prepared by the interaction of colloidal silver and chlorine-water is a definite chemical compound, since successive chlorinations of colloidal silver produce a series of homogeneous mixtures of silver and silver chloride.