Short Description:

QuercetinQuercetina is a plant flavonol from the flavonoid group of polyphenols. It is found in many fruits, vegetables, leaves, seeds, and grains; red onions and kale are common foods containing appreciable amounts of quercetin.[2] Quercetin has a bitter flavor and is used as an ingredient in dietary supplements, beverages, and foods. 

Product Detail


Product Description

Product Name: Quercetin

Category: Plant Extracts

Effective components: Quercetin Dihydrate, Quercetin Anhydrous

Analysis: HPLC

Quality Control: In House

Formula: C15H10O7

Molecular weight: 302.24

CAS No: 117-39-5

Appearance: Yellow powder

Identification: Passes all criteria tests

Product Function: 

1. Super Quercetin may expel phlegm and arrest coughing, it can also be used as anti-asthmatic; Quercetin Complex; Quercetin weight loss.

2. Quercetin has antibacterial, anti-inflammatory and anti-allergic effects.

3. Quercetin has the effect of lowering blood pressure and blood lipid.

Storage: keep in cool and dry place, well-closed, away from moisture or direct sunlight.

What specifications do you need?

There are several specifications about Sophora Japonica Extract.

Details about product specifications are as follows:

Quercetin Dihydrate Powder 98% | Quercetin Dihydrate Powder 95% | Quercetin Dihydrate Granular 95% | Quercetin Anhydrous Powder 95% | Quercetin Anhydrous Granular 95% 

Do you want to know the differences? Contact us to learn about it. Let us answer this question for you!!!

Contact us at info@ruiwophytochem.com !!!

Do You Care If Your Partner Have Their Own Factory?

If you care, we are a good choice. We are manufacturer, Ruiwo has set up three production bases in Indonesia, Xianyang and Ankang. 

Do you want to come and visit our factory? You are always welcome to come.

Ruiwo factory

Do You Attach Importance To Quality, How Do You Choose?

If you want your partners to pass SGS, FDA, 3A, ISO9001, ISO14001, HACCP, Kosher, Halal, and food production licenses(SC) these certifications, then we—Ruiwo are your best choice. Welcome to contact us!

Ruiwo owns a standard laboratory equipped with a full set of equipment, including instruments applied to TLC, HPLC, UV, GC, microbiological testing and so on. Ruiwo attaches high importance to the construction of quality system, regarding quality as life, strictly to maintain high quality.


Certificate of Analysis

Product name Quercetin Botanical Source Sophora Japonica
Batch NO. RW-Q20210503 Batch Quantity 1000 kgs
Manufacture Date May 3. 2021 Expiration Date May 7. 2021
Solvents Residue Water&Ethanol Part Used Flower Bud
Physical&Chemical Data
Color Yellow Organoleptic Conforms
Ordour Characteristic Organoleptic Conforms
Appearance  Powder Organoleptic Conforms
Analytical Quality
Assay(Quercetin) ≥95% HPLC/UV 95.16%
Loss on Drying 5.0% Max. Eur.Ph.7.0 [2.5.12] 2.21%
Total Ash 5.0% Max. Eur.Ph.7.0 [2.4.16] 1.05%
Sieve 100% pass 80 mesh USP36<786> Conform
Solvents Residue Meet Eur.Ph.7.0 <5.4> Eur.Ph.7.0 <2.4.24> Qualified
Pesticides Residue Meet USP Requirements USP36 <561> Qualified
Heavy Metals
Total Heavy Metals 10ppm Max. Eur.Ph.7.0 <2.2.58> ICP-MS Conforms
Lead (Pb) 2.0ppm Max. Eur.Ph.7.0 <2.2.58> ICP-MS Conforms
Arsenic (As) 1.0ppm Max. Eur.Ph.7.0 <2.2.58> ICP-MS Conforms
Cadmium(Cd) 1.0ppm Max. Eur.Ph.7.0 <2.2.58> ICP-MS Conforms
Mercury (Hg) 0.5ppm Max. Eur.Ph.7.0 <2.2.58> ICP-MS Conforms
Microbe Tests
Total Plate Count NMT 1000cfu/g USP  <2021> Conforms
Total Yeast & Mold NMT 100cfu/g USP  <2021> Conforms
E.Coli Negative USP  <2021> Negative
Salmonella Negative USP  <2021> Negative
Packing&Storage   Packed in paper-drums and two plastic-bags inside.
N.W: 25kgs
Store in a well-closed container away from moisture, light, oxygen.
Shelf life 24 months under the conditions above and in its original packaging.

Application of Quercetin

1. Quercetin is a plant pigment with potent antioxidant properties. It’s present in many common foods, such as onions, apples, grapes, and berries.

2. It can also be purchased as a dietary supplement for a variety of uses.


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