Description

Oak, Quercus Robur, Ext. is a standardized botanical extract derived from the bark, leaves, or wood of the English Oak tree (*Quercus robur*). This natural extract is valued for its rich content of bioactive polyphenols, particularly tannins, which provide powerful astringent and antioxidant properties. It serves as a key functional ingredient for manufacturers in the cosmetic, nutraceutical, and traditional herbal supplement industries seeking natural, plant-based solutions.

Application

• Cosmetic & Skincare Formulations: Used as a natural astringent and pore-refining agent in toners, cleansers, and anti-aging serums for its skin-tightening and antioxidant benefits.
• Nutraceuticals & Dietary Supplements: Incorporated into capsules and tablets for its traditional use in supporting vascular health and providing antioxidant support.
• Oral Care Products: Employed in mouthwashes and toothpastes for its astringent and mild antimicrobial properties, helping to strengthen gums.
• Hair Care Products: Added to shampoos and scalp treatments to help control excess oil and provide a soothing effect on the scalp.
• Natural Tanning & Leather Processing: Utilized in traditional vegetable tanning processes due to its high tannin content.
• Functional Beverages: Used as a bioactive ingredient in health-focused teas and tonics.

Basic Information

Product Name	Oak, Quercus Robur, Ext.
CAS No.	71011-28-4
Molecular Formula	Not Applicable (Complex Botanical Extract)
Molecular Weight	Not Applicable
Synonyms	English Oak Extract; Quercus Robur Bark Extract; Oak Bark Extract; Oak Wood Extract; Quercus Cortex Extract; Tannin Extract from Oak; Astringent Oak Extract; Fagaceae Extract
EINECS	Contact for details

Quality Control

Our Oak, Quercus Robur, Ext. is produced under strict quality management protocols. Each batch is tested to ensure consistent activity, typically standardized to key marker compounds like tannic acid or total polyphenols. We provide comprehensive Certificates of Analysis (COA) detailing identity, purity, and assay results. Production can adhere to relevant standards for botanical ingredients, including ISO, GMP, and Kosher/Halal certifications upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 15-25°C. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and clumping.

Specification

Item	Specification
Appearance	Fine Brown to Tan Powder
Identification (HPLC/TLC)	Complies with Standard
Assay (Total Polyphenols)	Min. 40% (as Tannic Acid Equiv.)
Loss on Drying	≤ 5.0%
Ash	≤ 5.0%
Heavy Metals (as Pb)	≤ 10 ppm
Total Plate Count	≤ 1000 CFU/g
Yeast & Mold	≤ 100 CFU/g

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.