Items

Standards

Results

Appearance

White crystals or crystalline powder

Conform

Solubility

Freely soluble in acetic acid and water, Slightly soluble in methanol, very slightly soluble in ethanol, it dissolves in 0.1mol/L hydrochloric acid

Conform

Melting point

163~168°C

164.9~165.4°C

Specific rotation

+45~48°

+45.1°

Identification

1) The IR absorption spectrum of the sample is concordant with that of Voglibose reference standard AWS codes

2) NMR

Conform

Acidity

9.8 ~10.4

9.91

Total impurity

≤0.2%

0.08%

Residual solvent

Methanol

Ethanol

Dichloromethane

≤0.3%

≤0.5%

≤0.06%

ND

0.1%

ND

Water 

≤0.2%

0.11%

Residue on ignition 

≤0.1%

0.08%

Heavy metals

≤10ppm

≤10ppm

Assay 

(on dried basis)

≥99.0% asme standards downloads

99.9% free download codes