Lead chloride oxide, with the chemical formula PbOCl, is a compound that typically exists as a white or pale yellow solid. It is also known by the mineral name cotunnite. Lead chloride oxide is formed through the reaction of lead oxide (PbO) with hydrochloric acid (HCl), or by the interaction of lead chloride (PbCl2) with oxygen under certain conditions. This compound has limited commercial applications compared to other lead oxides, primarily due to its relative instability and solubility in water. It is sometimes used in specialized applications such as in the production of lead glass and certain types of ceramics. However, its toxicity limits widespread use, and strict precautions must be taken during handling and disposal to prevent environmental contamination and health hazards associated with lead exposure.