High-purity hydrogen chloride gas is widely used in the removal of metal impurities and hydroxyl groups in quartz sand purification, and significantly improves the purity, optical properties and mechanical strength of quartz products through high-temperature chlorination purification and surface modification, and is the core process gas of optical fiber, photovoltaic and semiconductor industry chains. This product has the advantages of ultra-high purity, which can meet the requirements of customers for a variety of packaging and cylinder joints.