Electronic-grade phosphoric acid is an indispensable high-purity chemical in the semiconductor manufacturing process, and plays an important role in aluminum and aluminum alloy etching, silicon nitride selective etching, wafer cleaning and surface treatment, and chemical mechanical polishing due to its moderate acidity, high temperature stability and unique solubility characteristics. This product has the advantages of ultra-high purity, low particulate matter, controllable concentration and high precision, which can meet a variety of packaging requirements of customers.