Pentylene Glycol

Pentylene Glycol is a multifunctional ingredient used in cosmetic formulations as a humectant, solvent, and formulation support component.

It helps improve moisture retention within the formulation while enhancing the performance and delivery of other ingredients. In water-based systems, it contributes to a smoother, more balanced skin feel compared to traditional humectants alone.

Pentylene Glycol is also valued for its ability to support preservative systems, making it a practical addition in formulations where stability and overall system performance are important.

It is widely used across serums, lotions, gels, and cleansing products as part of well-balanced, high-performing formulations.

KEY SPECIFICATIONS

Ingredient: Pentylene Glycol (USP)
INCI: Pentylene Glycol
CAS: 5343-92-0
Solubility: Water soluble
Typical use level:
- Leave-on: 1–5%
- Rinse-off: 1–3%
- Commonly used alongside glycerin to reduce tack and improve sensory balance
Starter: 2–3% for most cosmetic formulations

FORMULATION NOTES

Processing notes

Add to the water phase with mixing until fully uniform. Suitable for cold-process and heated systems.

Pentylene glycol integrates easily into most formulations and does not require pre-dissolving.

Compatibility notes

Compatible with most cosmetic ingredients and preservative systems
Often paired with glycerin, propanediol, or sodium PCA in humectant systemsS
Supports preservative efficacy in many formulations

pH notes

Stable across typical cosmetic pH ranges (approx. 4–8).

Formulation examples

Hydrating toner (2–4%)
Barrier-support serum (2–5%)
Lightweight lotion (1–3%)
Preservative-support system (2–4%)

SENSORY PROFILE

Pentylene glycol contributes a lightweight, smooth skin feel with lower perceived tack than glycerine at comparable use levels. It is commonly used to balance humectant systems, improving slip and overall sensory profile in both leave-on and rinse-off formulations. Sensory outcome is formulation-dependent; bench testing is recommended.