Propylene glycol ether and ethylene glycol ether both belong to the category of glycol ether solvents. Propylene glycol ether is less toxic to the human body compared to ethylene glycol ether products, making it a low-toxicity ether. Propylene glycol methyl ether has a faint ether-like odor but lacks a strong irritating smell, which makes its applications broader and safer. Due to the presence of both ether and hydroxyl groups in its molecular structure, it exhibits excellent solubility, along with a suitable evaporation rate and reactivity, leading to its wide range of applications.