dipropylene

Dipropylene glycol, commonly abbreviated DPG, is a colorless, viscous, hygroscopic liquid used as a solvent and humectant in a variety of products. It is a diol derived from propylene oxide and contains two hydroxyl groups, which give it relatively high polarity and water miscibility. It is typically produced by controlled condensation of propylene oxide under catalytic conditions.

DPG is miscible with water and many organic solvents and has a high boiling point with low vapor pressure, contributing to its utility as a non-volatile solvent. It is less volatile than many simple glycols, which helps reduce evaporation in formulations. In terms of handling, DPG is stable under normal storage conditions and is generally compatible with a wide range of materials used in manufacturing.

Applications for dipropylene glycol span several industries. In cosmetics and personal care, it serves as a humectant and solvent, helping to dissolve and stabilize fragrances, flavors, and active ingredients in creams, lotions, and toothpaste. In the coatings, inks, and adhesives sectors, it acts as a solvent and plasticizer, improving flow and compatibility with resins. It is also used as a carrier for essential oils and flavors in various consumer products. In polymer and polyurethane formulations, DPG can function as a polyol component, contributing to material flexibility.

Safety and environmental aspects: DPG is regarded as having relatively low acute toxicity and is widely used within regulatory guidelines for cosmetics and consumer products. Prolonged exposure to concentrated solutions can cause irritation to skin or eyes. It is expected to be biodegradable and to pose low ecological risk when released in typical environmental concentrations, though handling in bulk should follow standard industrial hygiene practices.