ANALYSIS

SPECIFICATION

RESULTS

Appearance

Almost White crystalline powder

Complies

Solubility

Complies

Complies

Melting range

250°C -255°C

251°C -253°C

Assay (HPLC)

Resveratrol≥98.0%

98.9%

Identity Test A

Positive reaction

Positive reaction

Identity Test B

The retention time of the Assay preparation Corresponds to the Standard preparation

Complies

IR Absorption

Concordant with the reference

Concordant with the reference

Related substance

Single impurity≤0.5%

0.05%

Total impurities≤1.0%

0.05%

Water

≤1.0%

0.3%

Residue on ignition

≤1.0%

<0.1%

Heavy Metals

<20ppm

Complies

Residual Solvents

Ethyl acetate <5000ppm

<1ppm

Chlorobenzene not be detected

Not be detected

Ethanol <5000ppm

352ppm