Pure Quercetin Dihydrate Powder

Our Pure Quercetin Dihydrate Powder is derived from the flower of Sophora japonica. And its main ingredient is quercetin, which 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 the relief of allergies and asthma.

Analysis	Specification	Result	Test method
Physical Description
Appearance	yellow fine powder	Complies	Visual
Odor	Characteristic	Complies	Organoleptic
Tasted	Characteristic	Complies	Organoleptic
Particle size	100% through 80 mesh	Complies	80 Mesh
Extract solvent	Water	Complies	/
Bulk density	40~65g/100ml	45.3g/100ml	/
Chemical Tests
Assay (Sophora Japonica Extract)	95%	Complies	TLC
Loss on Drying	8-12% Max	0.18%	5g/105ºC/2hrs
Sulphated Ash	0.5%Max	0.22%	2g/525ºC/3hrs
Heavy metals
Pb	2ppm Max	Complies	AAS
As	2ppm Max	Complies	AAS
Cd	1ppm Max	Complies	AAS
Hg	1ppm Max	Complies	AAS
Microbiology Control
Total plate count	10,000cfu/g Max	Complies	AOAC
Yeast & Mold	1000cfu/g Max	Complies	AOAC
E. Coli	Negative	Negative	AOAC
Salmonella	Negative	Negative	AOAC
Conclusion	Complies with the standards.
General Status	Non-GMO, Non-irradiation.
Packing and Storage
Packing: Pack in paper-carton and two plastic-bags inside.
Shelf life: 2 years when properly stored.
Storage: Store in a well-closed place with constant low temperature and no direct sunlight.

1. Quercetin is good at expectorant, cough effect, and treating asthma.

2. Quercetin is useful to lower blood pressure, increase capillary resistance, reduce capillary fragility, lower blood fat, expand the coronary artery, increase coronary blood flow, and so on;

3. Quercetin is also to treat chronic bronchitis and is good at treating coronary heart disease and high blood pressure.

4. Quercetin can significantly inhibit the role of tumor promoters, inhibit the growth of ex vivo malignant cells, inhibit Ehrlich ascites cancer cells DNA, RNA, and protein synthesis.

5. In addition to Quercetin for food antioxidant, but also can be used as food yellow pigment.

6. Quercetin can be used as a medium dye. For wool and cotton, yellow with aluminum salt, olive salt with a yellow chromate salt, with orange salt tin, olive salt with iron green. Good resistance to soaping, light, and medium.

1. Pharmaceutical industry: Some medicine with bromelain like throat tablets can diminish inflammation, facilitate digestion, and improve immunological competence. So it can be applied in the examination, treatment of gynecopathy, glaucoma, and inset biting.

2. Pure quercetin dihydrate powder Food industry: It can be applied in hydrolyzing protein of plants and animals, so it can be used in the meat tenderizer, wine clarifier, stabilizer of noodles, health foods and soy sauce brewing, etc. It can also improve the nutritional value.

 

Packaging & Shipping

1kg/Aluminum foil bag ,25kg/drum.Or a small package as the customer's requirement.

 

Q1: What specifications do you offer for bulk orders?

A: Quercetin Dihydrate content of 95% or 98%, tested by HPLC. Specs can be adjusted to your formulation target, with COA, MSDS, and microbiological reports provided per batch.

Q2: What is your MOQ for wholesale orders?

A: MOQ starts from 1kg for trial quantities, up to 25kg drums for commercial orders. Flexible terms available for long-term partnerships.

Q3: How do you ensure quality and stability during shipping?

A: Controlled extraction and crystallization, packed in moisture-resistant, food-grade packaging. Recommend storing in a cool, dry place away from direct light.

Q4: Do you support OEM/private label projects?

A: Yes - including custom blends with bromelain, vitamin C, or zinc for immune-support and cardiovascular formulas. Our team can advise on compatibility for qualifying volumes.

 

Sheerherb has been producing Pure Quercetin Dihydrate Powder for years and is certified to ISO 9001, ISO 22000, HACCP, Kosher, Halal, and GMP standards. As a supplier serving customers worldwide, we keep pricing competitive without compromising on purity - no unlisted additives, no shortcuts on testing.

 

We operate our own extraction facility and R&D team, which means formulation questions, custom specifications, and sample requests are handled in-house rather than passed through a third party - giving you faster turnaround and more control over the final spec.

 

If you're comparing quercetin powder wholesale prices or need a quercetin raw material supplier for OEM/private label production

contact chriswang@sheerherb.com for current pricing, COA samples, and a formal quote.