Quercetin Powder

ITEMS

SPECIFCATIONS

RESULTS

Appearance

Yellow or greenish-yellow,crystalline powder

Greenish-yellow crystalline powder

Solubility

Practically insoluble in chloroform and ether

Complies

Infinitesimally soluble in cool water

Complies

Sparingly soluble in boiling ethanol and boiling water

Complies

Dissolves in solution of alkali hydroxides

Complies

Identification

A.B.C

Complies

Loss on drying

5.5-9.0%

7.76%

Residue on Ignition

≤0.5%

0.35%

Impurity quercetin

≤5%

< 4%

Red pigments

≤0.004%

<0.004%

Heavy Metal

≤20ppm

<10ppm

Mesh Size

100% pass 80 mesh

100% pass 80 mesh

Assay (anhydrous substance)

95.0%-101.5% Dihydroquercetin

95.32%

Conclusion: It conforms to NF11 STANDARD