Pentylene Glycol

Pentylene Glycol is a diol (a linear glycol with five carbon atoms), used in cosmetics as a multifunctional ingredient. It appears as a clear, odorless or slightly sweet-smelling liquid, fully soluble in water. It is well known for its moisturizing, solvent, and antimicrobial properties, making it highly valued in modern formulations, including those with low preservative content.

Functions and Cosmetic Activity

Pentylene Glycol performs multiple functions within a cosmetic formulation:

- It is an effective humectant, capable of retaining water in the upper layers of the skin, maintaining skin hydration and softness without causing an occlusive or sticky effect.

- It acts as a solvent, promoting the solubilization of both water-soluble and oil-soluble active ingredients in the aqueous phase, thereby improving their bioavailability.

- It is also known for its role as a preservative booster: while not a preservative in itself, it exhibits a mild antimicrobial activity and enhances the efficacy of preservative systems, helping reduce the overall preservative load in the formula.

- It improves the sensory profile of the product, providing a feeling of freshness, lightness, and smooth glide on the skin.

Cosmetic Benefits

The use of Pentylene Glycol ensures good skin hydration without the tackiness or heaviness often associated with other humectants like glycerin. It is well tolerated by sensitive, reactive, or oily skin, thanks to its low comedogenic index and lightweight nature. Additionally, its presence contributes to enhanced microbiological stability, even in formulas with reduced preservative content.