Solubility: Soluble in water and some solvents, such as the appropriate proportion of ethanol/water, propanol/water, etc. The aqueous solution has surface activity. With high transparency and stable performance, the gel temperature of different specifications is different, the solubility changes with viscosity, the viscosity is lower and the solubility is greater. The performance of HPMC with different specifications has a certain difference. The dissolution of HPMC in water is not affected by the PH value.