Is dipropylene glycol safe if accidentally ingested via cosmetics?

Is dipropylene glycol safe if accidentally ingested via cosmetics?
Dipropylene glycol (DPG), also known as one-two propylene glycol ether, is a low-toxicity solvent and humectant widely used in cosmetics, personal care, and fragrances. Its toxicity is negligible at typical exposure levels; accidental ingestion of a small amount, such as a sip of toner, poses no significant health risk. DPG is also a key solvent in perfumery, often used at over 50% concentration in fragrance oils to dilute materials without ethanol. Beyond cosmetics, it serves as a coupling agent, moisturizer, and viscosity regulator in lotions, cleansers, and deodorants. Its low odor, high boiling point, and water-oil solubility make it ideal for sensitive applications. Industrial uses include unsaturated polyester resins, plasticizers, and heat transfer fluids, where its stability and slow evaporation are valued.