Propylene Glycol

Propylene Glycol

Propylene glycol (PG) is a common multifunctional ingredient used in skincare, haircare, and makeup. It is valued for its ability to hydrate, dissolve active ingredients, and improve product texture and penetration.

INCI Name

Propylene Glycol

Appearance

Clear, colorless liquid
Slightly viscous
Odorless

Key Functions in Cosmetics

1. Humectant
   Draws moisture into the skin and helps maintain hydration. Lighter than glycerin.

2. Solvent
   Dissolves active ingredients, preservatives such as Liquid Germall Plus, plant extracts, and fragrances.

3. Penetration Enhancer
   Improves absorption of actives into the skin.

4. Viscosity Modifier
   Enhances smoothness and spreadability of formulations.

5. Preservative Booster
   Supports antimicrobial effectiveness in preserved formulas.

Usage Rates

Typical use levels: 1–10% in most skincare products

Works well in:

• Serums

• Toners

• Gels

• Creams and lotions

• Haircare products

• Makeup

Compatibility

Water-soluble
Compatible with most cosmetic ingredients
Stable across a wide pH range
Heat-stable; can be added during the heated water phase

Safety Notes

Generally safe and non-irritating at recommended cosmetic use levels