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glacial acetic acid
Product Name: Quercetin
Synonyms: Meletin, Sophretin, Cyanidenolon, Permeability Factor, Permeability Vitamin,
Chemical Name: 4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl) -3,5,7-trihydroxy-
Molecular Formula: C15H10O7
Molecular Weight: 302.23
Physical Property: Yellow needle like crystal (dihydrate in dilute ethanol) , dehydrate at 95-97, Melting Point: 314C (dissociate) . Solubility: 1g in 290ml anhydrous ethanol, or 23ml of glacial acetic acid, yellow alkaline solution, almost insoluble in water, very bitter taste in ethanol.
Descriptions: It is a type of flavonoid which are water-soluble antioxidants which consist of a group of natural pigments. It is extracted from skin and leaves of Quercus iberica, full plant of Dysosma veitchii (Hemsl. et Vils. ) Fu and Hypericum ascyron L. , leaves of Apocynum lancifolium Rus. .
Appearance: Yellow Powder
Melting Point: 305-315C
Related substance: Passes
Reducing sugars: Not detected
Sulfate, ppm: 1000 max.
Chloride, ppm: 1000 max.
Heavy metals, ppm: 20 max.
Ash, %: 0.2 max.
Loss on drying, %: 9.5-12.5
Assay, %: 99.0 min.
Total plate count, pc/g: 1000 max.
Yeast & Mold, pc/g: 100 max.
E. Coli: Negative
Quercetin is naturally occurring substances thought to maintain normal conditions in the walls of the small blood vessels. They are absorbed into the bloodstream in the upper part of the small intestine. Excessive amounts are excreted in the urine. Bioflavonoids act synergistically with vitamin C to preserve and protect capillaries, promote circulation and lower cholesterol levels. Acts as an antioxidant and helps prevent Vitamin C and adrenaline from being oxidized by copper-containing enzymes.
Functions and Applications:
Fairly good expectorant and antitussive, some antiasthmatic effect, lowering of blood pressure, reducing the brittalness of capillary vessel, lowering blood lipid, dilation of coronary artery, increasing the flow in coronary artery. It is mainly treated with chronical bronchitis, coronary heart diseases and hypertension. Others as follows:
1. Reduce cancer risk
2. Reduce heart attack
3. Stave off cataracts
4. Control asthma
5. Maintain health when suffering from Crohns disease
6. Prevent recurrent gout attacks
7. Speed up healing of recurrent hearthburn, or gastroesophageal reflux disorder (GERD)
Toxicity: LD50 (Oral, mice) : 160mg/kg
Packing: 25kg cardboard drum
Storage: Store in cool and dry place