Hydroxybutyric Acid/Hydroxypentanoic Acid Copolymer
INCI: HYDROXYBUTYRIC ACID/HYDROXYPENTANOIC ACID COPOLYMER
Reviewed by Emma · Last updated 18 Aug 2026
What Is Hydroxybutyric Acid/Hydroxypentanoic Acid Copolymer?
Hydroxybutyric Acid/Hydroxypentanoic Acid Copolymer (INCI: HYDROXYBUTYRIC ACID/HYDROXYPENTANOIC ACID COPOLYMER) is a cosmetic ingredient listed in the EU CosIng inventory. Pentanoic acid, 3-hydroxy-, (3R)-, polymer with (3R)-3-hydroxybutanoic acid, from Cupriavidus necator fermentation of D-glucose and propionic acid.
Its declared cosmetic functions are abrasive, skin conditioning and viscosity controlling.
Source: European Commission CosIng inventory.
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