Acetone

Acetone is a simple organic solvent—a colourless, volatile liquid that evaporates readily at room temperature. In skincare formulations, it functions primarily as a denaturant (a substance added to render an ingredient unsuitable for consumption) or as a solvent to help dissolve and incorporate other active compounds into a product.

You'll encounter acetone most commonly in nail products and some specialised skincare formulations where its rapid evaporation and dissolving properties are useful. Because it evaporates so quickly, it typically leaves minimal residue on the skin once a product has dried.

Acetone works through its chemical properties as a volatile solvent. When applied to skin as part of a formulation, it dissolves and carries other ingredients, allowing them to be absorbed or distributed evenly across the surface. Because acetone has a low boiling point (around 56°C), it evaporates rapidly at body temperature and room temperature, which is why products containing it typically dry down quickly.

Its role is largely functional rather than therapeutic—it facilitates the delivery or stability of other active ingredients rather than providing direct skincare benefits itself.

Products containing acetone should be used as directed on the label. Allow formulations containing this ingredient to dry completely before applying other products, as acetone's rapid evaporation may affect how subsequent layers absorb. Store acetone-containing products in cool conditions away from heat, as acetone is flammable and will evaporate more quickly in warm environments.