Propylene glycol ether and ethylene glycol ether belong to the same binary alcohol ether solvent, propylene glycol ether toxicity to human body is lower than ethylene glycol ether products, belong to low toxic ether. Propylene glycol methyl ether has a weak ether taste, but no strong pungent odor, making it more widely used and safe. Because it has both ether and hydroxyl groups in its molecular structure, it has excellent solubility, suitable volatilization rate and reaction activity, and has been widely used. In addition to solvents for a variety of coatings, it is also used to control volatilization rate and viscosity regulator in printing inks. It can also be used in chemical intermediates, as a viscosity regulator in brake fluid formulations, as propylene glycol methyl ether can be miscible with water in any proportion, it can be used as a solvent in metal cleaning agent formulations, or used in automotive water tank anti-icing fluid to reduce the freezing point and many other fields.