This product is suitable for the pH stabilizer used in the anodizing process of aluminum alloy. The pH of the dyeing solution can be adjusted between 5.0 and 5.5. It has good pH stability and can stabilize the PH of the dyeing solution during the production process for a long time. Unstable phenomenon. This product is made of RoHS environmentally friendly raw materials, with many advantages such as low dosage, good effect, low cost, simple and easy to control.