About Shaanxi Hongda Phytochemistry - Your Trusted Kaempferol Extract Manufacturer

Over 20 years experience manufacturing standardised botanical extracts with advanced technology and strict quality control methods since 2001. Opting for us in Kaempferol Extract, you obtain 98% HPLC-verified purity, overcoming key formulation hurdles: higher bioavailability vs raw botanical powders, increased stability in complicated matrices and uniform batch-to-batch consistency. Our 20,000 square metre factory features 100,000 level purification workshops and laboratories that fulfil SGS requirements so that every kilogram is produced according to worldwide pharmaceutical and nutraceutical standards. Our vertical integration is what makes us really different. From our dedicated Sophora japonica planting bases to our state-of-the-art extraction lines with 3,000 tonnes annual output, we handle every quality touchpoint.

Product Introduction

The product is a high grade yellow crystal flavonol substance extracted from Sophora japonica flower buds selected with advanced solvent extraction and purification techniques. This bioactive substance has a chemical structure (C15H10O6) that gives powerful antioxidant benefits that are more effective than standard flavonoid blends. The standardised extract is tested and certified by HPLC methods for 98% purity to ensure consistent performance in your nutritional supplements, cosmeceutical formulations, and pharmaceutical research applications. It is a fine crystalline powder which has great stability properties and can be uniformly blended in a range of delivery systems such as capsules, tablets and skincare emulsions, making it an ideal ingredient choice for producers looking for reliable, high performing natural ingredients.

Third-Party Test Report

Authenticity Verification: You may be fully confident in our product’s supply chain transparency and regulatory assurance, with each batch independently tested by internationally recognised agencies such as SGS and Eurofins.

Pesticide Residue Analysis: Extensive screening of over 500 pesticide chemicals in accordance with EU and USDA organic regulations to ensure your completed products meet the most demanding international market standards for consumer safety.

Heavy Metal Compliance Testing: ICP-MS analysis performed by our third party partners confirms Lead <3.0ppm, Cadmium <1.0ppm, Arsenic <2.0ppm and Mercury <0.1ppm, fully consistent with USP, EP and FDA criteria for dietary constituents.

Kaempferol powder

Certificate of Analysis

Item	Specification Method	Result
Physical and Chemical Property
Appearance	Yellow Crystalline Powder	Conforms
Particle Size	95% through 80 mesh	Conforms
Residue on Ignition	≤5g/100g	1.28g/100g
Loss on Drying	≤5g/100g	3.05g/100g
Identification		Conforms
Content:	Kaempferol 98%	Conforms
Residue Analysis
Heavy Metals	≤10.0mg/kg	Conforms
Lead (Pb)	≤2.00mg/kg	Conforms
Arsenic (As)	≤2.00mg/kg	Conforms
Cadmium (Cd)	≤1.00mg/kg	Conforms
Mercury (Hg)	≤0.01mg/kg	Conforms
Microbiological Tests
Total Plate Count	≤1000cfu/g	124cfu/g
Total Yeast & Mold	≤100cfu/g	45cfu/g
E.Coli.	Negative/10g	Conforms
Salmonella	Negative/10g	Conforms
S.aureus	Negative/10g	Conforms
Product Status
Conclusion:	Sample Qualified.

Kaempferol Extract Advantages

Enhanced Bioavailability: Our exclusive purification technique has enabled our crystalline extract to attain 98% purity, allowing for much better cellular absorption than crude botanical powders, which only contain 2-5% active flavonols.

Outstanding Oxidative Stability: The unusual C2-C3 double bond configuration provides excellent free radical scavenging properties that stay stable throughout the shelf life of your product, even under tough formulation conditions such as those containing vitamins and other antioxidants.

Optimal Lipophilic Properties: Unlike the hydrophilic glycoside versions, our aglycone form may readily enter cellular membranes and is thus perfect for targeting intracellular oxidative stress pathways for supplement and cosmeceutical uses.

Production Process

Step 1 - Raw Material Selection and Preparation: Our agronomists harvest premium Sophora japonica flower buds at peak flavonol concentration from our certified planting bases, followed by immediate cleaning and drying under controlled temperature conditions. Maximum retention of active compounds with minimum degradation before extraction.

Step 2 - Solvent Extraction: The prepared botanical material is extracted in multi-stage countercurrent extraction with food-grade ethanol in stainless steel extraction containers under strictly controlled temperature and pressure conditions. Maximum kaempferol yield with minimum co-extractives and molecular integrity preservation.

Step 3 - Concentration and Purification: The extract liquid is subjected to vacuum concentration systems and advanced chromatographic separation procedures, which isolate kaempferol from other flavonoid constituents. HPLC analysis of pharmaceutical grade standards showed a progressive improvement in purity over 98%.

Step 4 - Crystallisation: The kaempferol solution, after concentration, is cooled in a controlled manner inside specialised reactors, producing uniform yellow crystals that are finally separated by centrifugation. Formation of stable crystalline structure with specified particle size distribution ideal for tableting and encapsulating

Kaempferol powder

Kaempferol Extract Application

Metabolic Health Supplements: The extract is formulated into capsules and softgels that are marketed for weight management and glucose metabolism support. The extract’s capacity to inhibit adipogenesis delivers measurable benefits to consumers seeking natural solutions to optimise their metabolic health.

Anti-Aging Skincare Systems: Incorporated into high-end serums, creams and sun protection products at a 0.5-2% concentration, where it inhibits collagen-degrading matrix metalloproteinases (MMPs) and protects against photoaging. Stable in emulsions at pH 5.0-6.5.

Cardiovascular Wellness Formulas: Combines synergistic antioxidant action in heart health supplements with complementary flavonoids such as quercetin and resveratrol, supporting endothelial function and healthy inflammatory response.

Why Choose Us?

Your ingredient partners should know botanical science and business realities to help you succeed. Shaanxi Hongda Phytochemistry provides this unusual mix with our vertically integrated processes from cultivation to final Packaging. With 3 specialised planting bases, we ensure raw material traceability and quality from the soil up. Our 20,000 square metre facility with more than 10 sophisticated production lines and patent protected extraction technology ensures manufacturing excellence.

Our factory

OEM/ODM Support

Custom Formulation Development: Work with our team of 20+ PhD-level researchers to produce customised blends using kaempferol and other botanicals, vitamins or minerals designed to meet your target market's unique health goals and regulatory environment.

Delivery Format Options: We manufacture your unique formulations in a range of forms including vegetarian capsules, tablets with custom coatings, ready-to-mix powders, and concentrated liquid Kaempferol Extracts, all produced in our cGMP and FSSC22000-certified plants.

Solutions for Private Label Packaging: Select from our vast range of packaging solutions or give your own designs, we take care of anything from little aluminium foil sachets through to large industrial barrels with retail-ready blistering, bottling and secondary packing with your branding.

Packaging

Our Certifications

Certifications

Our Exhibition

Exhibitions

FAQ

Q: How does your product compare to lesser cost alternatives?

A: We use our exclusive purification technique to provide pharmaceutical grade 98% purity, whereas usual market items are 50-70% purity. So you use less material per dose, you get better uniformity and you avoid inactive substances that can cause discolouration or stability problems in your finished products.

Q: Do you have samples to test formulations?

A: Of course. We provide 50-100g samples in aluminium foil bags with full COA documentation. Samples are normally shipped within 2 business days and our technical team may assist you with formulation advice for your individual application requirements.

Q: What is the minimum order quantity you have for bulk purchase?

A: Our usual MOQ is 25kg (one drum) although we can allow smaller amounts for new customers establishing formulations. Volume price tiers from 100kg with further discounts on 500kg orders.