Quercus infectoria gall extract

Quercus infectoria gall extract (CAS 93165-57-2), also known as oak gall extract, is a plant-derived ingredient obtained from the galls of the Quercus infectoria oak tree.

Where is Quercus infectoria gall extract used?

• Personal care and cosmetics: astringent and skin-tightening agent in toners, intimate hygiene products and anti-aging formulations
• Pharmaceuticals: active or excipient in topical preparations targeting inflammation
• Oral care: antimicrobial and tannin content in mouthwashes and gum formulations
• Food and nutraceuticals: antioxidant activity extends shelf life in sensitive formulations
• Rich in tannins and polyphenolic compounds, it functions as a natural antioxidant, astringent and preservative.

Good to know: Standardization is typically expressed by tannin or gallic acid content, with specifications varying by supplier and end-use requirement.

Commercial specifications

• Standardization expressed by tannin or gallic acid content
• Documentation to USP or Ph. Eur. general monograph standards for botanical extracts