1, 2-propylene glycol in the pharmaceutical industry is often used to manufacture all kinds of ointments, ointments solvent, softener and excipient, in the pharmaceutical industry as a mixture, preservatives, ointments, vitamins, penicillin and other solvents. Because propylene glycol and all kinds of spices have good mutual solubility, so it is also used as a cosmetic solvent and softener and so on.
