Quercetin
Item | Specifications | Result | Test Method |
Appearance | Yellow powder | Complies | Visual |
Identification | Must Positive | Positive | Infrared Absorption |
Melting point | 305℃—315℃ | 312℃ | Melting point Apparatus |
Particle size | 95% pass through Sieve # 80 mesh | Complies | US Screen |
Reducing sugars | Not be detected | Not detected | Chemical reaction |
Sulfate | ≤1000ppm | <1000ppm | AJ192 |
Chloride | ≤1000ppm | <1000ppm | AJ192 |
Bulk density | ≥0.20gm/cc | 0.24gm/cc | CP2010 |
Tapped Density | ≥0.30gm/cc | 0.35gm/cc | CP2010 |
Heavy metals | ≤10ppm | <10ppm | Visual Colorimetry |
Arsenic | ≤1ppm | <1ppm | AAS |
Mercury | ≤0.1ppm | <0.1ppm | AAS |
Cadmium | ≤1ppm | <1ppm | AAS |
Lead | ≤3ppm | <3ppm | AAS |
Sulphated Ash | ≤0.30% | 0.14% | CP2010 |
Loss on drying | 9.5%—12.5% | 10.39% | 120℃ |
Assay by UV | 98.0%~102.0% | 98.64% | UV |
Total of bacteria | ≤10000Cfu/g | 100Cfu/g | AOAC966.23 |
Mildew & Yeast | ≤1000Cfu/g | 20Cfu/g | FDABAM8th |
Coliforms | ≤10cfu/g | <10cfu/g | AOAC911.14 |
Salmonella | Absence | Complies | FDABAM8th |
E. Coll | Absence | Complies | FDABAM8th |
Residual Solvent | Meets the requirements of USP. |
Pesticide Screen | Meets the Requirements of USP. |
GMO/BSE Status | Not genetically modified organism. Free of BSE. |
Storage | Store in tight containers,in a cool dry area. |
Conclusion | Conform with specification. |
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.
