Gold Member Since 2017
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Changsha Herbal Ingredient Co., Ltd.

Quercetin, Sophora Japonica Extract, Herbal Extract manufacturer / supplier in China, offering 95%Quercetin for Food Supplements and Apis, Natural Sweetener Sweet Tea Extract for 70%Rubusoside, (manufact) Ginkgo Biloba Leaf Extract for Foods and Supplement and so on.

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Supplier Homepage Product APIs 95%Quercetin for Food Supplements and Apis

95%Quercetin for Food Supplements and Apis

Purchase Qty.:
1-24 25-99 100+
FOB Unit Price: US $50 US $46 US $44
Purchase Qty. (kg) FOB Unit Price
1-24 US $50
25-99 US $46
100+ US $44
Get Latest Price
Port: Changsha, China
Production Capacity: 20t/Year
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: CHI-QUE
  • Assay Method: HPLC, UV
  • Application: Food, Health Care Products, Medicine
  • Extract Source: Quercetin
  • CAS Number: 117-39-5
  • Appearance: Yellow Green Powder
  • Trademark: CHI
  • Specification: Quercetin 95% by HPLC, 98%UV
  • HS Code: 130219
  • Certification: ISO, FDA
  • Application Form: Tablet, Capsule
  • State: Powder
  • Botanical Name: Sophora Japonica Ait
  • Part of Used: Seed
  • MOQ: 1kg
  • Transport Package: 1kg/Bag, 5kg/Bag, 25kg/Drum
  • Origin: China
Product Description
1. Sources and Habitation
Quercetin, a flavonol, is a plant derived flavonoid found in fruits, vegetables, leaves and grains.
 It also may be used as an ingredient in supplements, beverages or foods.
95%Quercetin for Food Supplements and Apis

2. Descriptions and Specifications of Product
Plant original: Sophora japonica L
Content Specifications: 95.0% Quercetin Test by HPLC
Molecular Formula: C15H10O7
Molecular Mass: 302.24
CAS NO: 117-39-5


Biological Use/Importance: quercetin is a potent antioxidant and has anti-inflammatory activity, protecting cellular structures and blood vessels from the damaging effects of free radicals. It improves blood vessel strength. Quercetin inhibits the activity of catechol-O-methyltransferase that breaks down the neurotransmitter norepinephrine. This effect may lead to elevated levels of norepinephrine and an increase in energy expenditure and fat oxidation. It also means quercetin acts as an antihistamine leading to relief of allergies and asthma. As an antioxidant, it reduces LDL cholesterol and offers protection from heart disease. Quercetin blocks an enzyme that leads to accumulation of sorbitol, which has been linked to nerve, eye, and kidney damage in diabetics.
95%Quercetin for Food Supplements and Apis


1.Quercetin is a powerful antioxidant.

2.Quercetin is a naturally-occurring polar auxin transport inhibitor.

3.Quercetin is also a natural anti-histamine, and anti-inflammatory. Research shows that quercetin may help to prevent cancer, especially prostate cancer. Physcion has strongly inhibition effects in human cervical cancer Hela cells, IC50 = 0.1kg/ml.

4.This product is good at expectorant, cough effect, and treating asthma.

5.It is useful to lower blood pressure, increase capillary resistance, reduce capillary fragility, lower blood fat, expansion of coronary artery, increase coronary blood flow and so on;It also to treat chronic bronchitis,and good at treat coronary heart disease and high blood pressure.


 ItemsSpecification Results Remark
AppearanceFine PowderCompliesVisual
OdorLight, CharacteristicCompliesOrganoleptic
Extraction methodEthanol & Water-NaoHComplies 
Mesh SizeNLT 95% pass 80 meshComplies80 Mesh Screen
Carriers UsedNoneComplies 
Moisture5.0%1.67%GB/T 5009.3
Ash5.0%1.26%GB/T 5009.4
Solvent Residue≤0.01%CompliesGC
Heavy Metals (as Pb)≤10 mg/kgCompliesGB/T 5009.74
Pb≤1 mg/kgCompliesGB/T 5009.75
As≤1 mg/kgCompliesGB/T 5009.76
Total Bacteria≤10,000CFU/gCompliesGB/T 4789.2
Yeast & Molds≤100CFU/gCompliesGB/T 4789.15
StaphylococcusAbsentCompliesGB/T 4789.10
Coliform bacteria/E.Coli AbsentCompliesGB/T 4789.3
SalmonellaAbsentCompliesGB/T 4789.4
PackagingNet 20.00 or 25.00kg/drum.
Shelf life24 months when properly stored. Tightly sealed in a clean, cool, dry place. Keep away from strong, direct light.
ConclusionComplies with specification


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