Isopropyl Alcohol
Isopropyl Alcohol (IUPAC: Propan-2-ol, Isopropanol; CAS #67-63-0) is a short-chain alcohol widely used in cosmetic formulations. Its official CosIng-listed functions include antifoaming, perfuming, solvent, and viscosity controlling. It is commonly found in acne treatments, toners, astringents, and spot correctors.
Primarily functions as a solvent to dissolve and carry other ingredients, and as a viscosity controller to adjust product texture. It is frequently used in blemish and acne-targeting products, likely for its ability to degrease skin and aid ingredient penetration.
Isopropyl Alcohol is flagged as "icky" by the source, suggesting it may be considered a less desirable ingredient. As a volatile alcohol, it has the potential to be drying or irritating, particularly with repeated use or on sensitive skin.
