What it does
- Hydrates with a light, non-sticky feel.
- Helps dissolve actives (a useful solvent/carrier).
- Improves overall sensory feel.
How it works
Propanediol is a small glycol widely documented as a humectant and effective solvent that can boost the solubility and penetration of other ingredients. It is generally better tolerated than propylene glycol and is often plant-derived.
Use level
- Typical use level
- typically 2–10%
Commonly used at 2–10% as a humectant/solvent; higher as a co-solvent for tricky actives.
Formulation considerations
- Water-miscible; add to the water phase.
- Useful for solubilising actives and preservatives.
- Light, non-tacky feel.
What it pairs with & what to avoid
Pairs well with
- Humectants such as glycerin
- Actives needing solubilisation
Use with care / avoid
- No notable incompatibilities
Regulatory status
Propanediol is listed in the EU CosIng database and is a well-established cosmetic ingredient.
Common questions
What does propanediol do?
It hydrates with a light feel and acts as a solvent that helps dissolve other actives.
Is propanediol better than propylene glycol?
It is often chosen as a gentler, plant-derived alternative with a lighter feel.
What percentage of propanediol is used?
Commonly 2–10%.