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Product Commercial Terms

Minimum Order Quantity:


Packaging Details:

Packed in paper-drums and two food gradeplastic-bags   inside.

Delivery Time:

7-15 days

Payment Terms:

T/TL/CWestern Union

Supply Ability:


Quick Detail:

1. Description

Quercetin is a natural pigment present in many fruitsvegetables and grains. It’s one of the most abundant antioxidants in the diet and plays an important role in helping your body combat free radical damage, which is linked to chronic diseases.In addition, its antioxidant properties may help reduce inflammation, allergy symptoms and blood pressure.

2. Specifications

Basic Information

Product name


Botanical Source

Sophroa Japonica l

Cas No




Fine powder





Physical/Chemical Characters

Molecule Formula


Molecule Weight



Barely soluble in water


Melting Point

314°to 317°



Residue on ignition







Total plate count


Molds & Yeast




Package & Storage

Sealed   in paper drum with double inner food-grade p.e.  bag, drum size:   40*40*50CM. Stored in cool and dry space, avoid strong direct  heat and   light.

Expiry Date

24 months

Non-GMO and radiation

Production   of Non-GMO raw materials, and no ionizing     radiation.



3. Functions and Features

  • Quercetin is an antioxidant, which may support your body to fight off damage and other negative ailments. Quercetin works stronger than vitamin C, vitamin E and even beta carotene.

  • Quercetin has anti-inflammatory effects, which may also support your body to fight against allergies.*

  • Quercetin, like most flavonoids, has qualities that can support fortify your health.

4. Applications

● Quercetin is an antioxidant that can reverse the immunosuppressive effects of hyperglycemia and hyperglycemic serum in patients with type 2 diabetes.

●It has been used as a detoxifying phytochemical for the European black bee.

●It is used as a positive control in DPPH (2,2-diphenyl-1-picrazine) free radical scavenging experiments. It can also be used to make a calibration curve for the determination of total flavonoids.

5. Packing Delivery

Bulk package(10kg-25kg): Paper drum with double inner food-grade pe bag.

Small package(1kg-5kg): Aluminum foil bag with inner food-grade pe bag (or as required).

6. FAQ

Q1. Why Choose Kang Biotech?

A1: Hunan Kang Biotech is a leading herbal extract manufacturer in China. In 1996, our head office Hunan Kang Medicine Group was started with a business mainly in the pharmaceutical field, as the supervisor of the raw material department, Dr. Xiao, was devoted to developing high-quality ingredients from natural plants, especially in citrus fruits, including citrus aurantium and citrus paradisi.

Kang Biotech was founded in 2011 as a developer and manufacturer. exporter and primary supplier of citrus aurantium extract, lotus leaf extract, kava extract, and selaginella based on years experience of in production, sales, and innovation.

Q2. Why should you buy from us not from other suppliers?

A2: The company's products include citrus extract, plant essential oil, citrus pectin, plant extract. We are a manufacturer and we have factory, quality assurance, technical support, patient sales etc..

Q3. What's the MOQ?

A3: MOQ is the minimum sales quantity of the product. Because each product has different prices and different packaging methods, there will be differences. Please consult the relevant professional sales manager for details.

Q4. What's the shipping time?

A4: Usually the products we sell have enough stock to deliver the goods in a short time.

Q5. Are you a manufacturer or trading company?

A5: We are a manufacturer.

Q6. How can I get a sample to check your quality?

A6: Before formal production, we will send samples to you for testing.

Q7. What about the lead time for mass production?

A7: About 30-45 days. 

Q8. If we have some other product requirements that your page don't include, can you help to supply?

A8: We would like to help. Please feel free to contact for consultation.


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