Propylene Glycol
What is Propylene Glycol?
Propylene glycol, chemically propane-1,2-diol, is a synthetic organic compound produced from propylene via hydrolysis. This colorless, odorless, viscous liquid is fully miscible with water and many solvents. In cosmetics, it appears in moisturizers, cleansers, serums, toners, and hair care products across rinse-off and leave-on formats. It functions as a humectant by absorbing atmospheric moisture and binding it to the skin's outer layer, reducing transepidermal water loss. As a solvent, it uniformly dissolves both water- and oil-soluble actives, enabling stable formulations. It also controls viscosity for optimal spreadability and acts as a carrier for fragrances and other components, enhancing sensory qualities and delivery efficiency. Its stability and low freezing point suit diverse product types.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Draws moisture to skin for hydration support
Enhances skin softness and flexibility
Improves product consistency and application ease
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| People with dry skin needing moisture retention | Those with sensitivity to glycols |
| Users of hydrating creams and lotions | People prone to contact irritation |
| Individuals seeking smoother formula textures | Individuals with propylene glycol allergy |
Safety Notes
- Deemed safe for use in cosmetics by regulatory reviews
- Presents low comedogenic potential
Frequently Asked Questions about Propylene Glycol
What is propylene glycol's main role in skincare?
It acts as a humectant to boost hydration, solvent for ingredients, and agent for skin conditioning.
Is it suitable for dry skin?
Yes, it supports moisture retention, making it helpful for dry skin types.
Does it clog pores?
It has a low comedogenic rating, unlikely to contribute to breakouts.