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| Rutin series |
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Quercetin
Xi'an Rainbow Bio-Tech Co., Ltd 
【NAME】：Quercetin
【SYNONYMS】：Sophoretin，Quertine
【SPEC.】：95% 98%
【TEST METHOD】： HPLC UV
【PLANT SOURCE】：Sophora japonica Ait.
【CAS NO.】：6151-25-3
【MOLECULAR FORMULA & MOLECULAR Mass】：C15H10O7 302.23
【STRUCTURAL FORMULA】： 
【CHARACTERISTIC】：Yellow powder, belongs to flavone,mp＞300℃(lit), soluble in glacial aetic acid, in aq alkaline solns with yellow color. Partially insol in water
【PHARMACOLOGY】：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.
【CHEMICAL ANALYSIS 】
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ITEMS |
RESULTS |
| Melting point |
305-315℃ |
| Loss on Drying |
More than 5.5%,Less than 9%
9.0%?12.0% |
| Sulphated ash |
Less than 0.3%
≤0.3% |
| Heavy Metal |
≤20PPM |
| Assay （by UV） |
More than 98%
≥98% |
| Total plate count Yeast & mold E.coli Salmonella |
<1000cfu/g
<100cfu/g
Negative
Negative |
| Melting point |
305-315℃ |
【PACKAGE】：Packed in paper-drums and two plastic-bags inside.N.W.:25kgs .
【STORAGE】：Keep in cool, dry and dark place, avoid high temperature.
【SHELF LIFE】：24 months |
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