AgCl2 refers to silver dichloride, a chemical compound consisting of silver (Ag) and chlorine (Cl) with the formula AgCl2. However, this compound is not commonly encountered, as silver typically forms the more stable compound silver chloride (AgCl). In practice, AgCl2 is less stable and can decompose or react under certain conditions. It is important to note that AgCl is the primary chloride of silver, widely studied for its photochemical properties.