Dipropylene Glycol

Benefits
Moisturizing

What is Dipropylene Glycol?

Dipropylene glycol is a clear, nearly odorless liquid, chemically an alkylene glycol ether produced by the controlled dimerization of propylene oxide from petroleum-derived sources. With the molecular formula C6H14O3, it belongs to the glycol family but differs from simpler glycols in its branched structure, offering enhanced solvency. In cosmetics, it appears in hydrating creams, serums, toners, and perfume formulations at various concentrations. It works by drawing atmospheric moisture to the skin as a humectant, while its solvent properties dissolve lipophilic and hydrophilic actives for uniform dispersion. This dual action supports even application and prevents phase separation. It also modulates flow properties, yielding spreadable consistencies, and solubilizes fragrances to prolong scent without altering the base odor profile.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1-2 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
Solvent
Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Masking
Reduces perception of unpleasant odors or tastes by neutralizing them or covering them with more acceptable sensory notes.

Benefits

- Draws moisture to skin for hydration support

- Dissolves diverse ingredients for stable, effective formulas

- Controls thickness for smooth, user-friendly textures

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 normal to dry skin needing hydration aid
- Individuals sensitive to glycol compounds
- Users of scented products for stable fragrance delivery
- People with fragrance allergies
- Those preferring lightweight, non-sticky formulations
- Those prone to contact dermatitis from solvents

Safety Notes

  • - Low hazard potential with minimal irritation reports
  • - Non-comedogenic and suitable for most skin types

Frequently Asked Questions about Dipropylene Glycol

Is dipropylene glycol comedogenic?

No, it has a comedogenic rating of 0 and does not clog pores.

What skin types suit dipropylene glycol?

Most types, especially dry or normal skin, as it supports hydration without greasiness.

Does it contribute to fragrance in products?

It solubilizes and stabilizes scents while masking base odors.