Items

Standard

Test Result

Appearance

White to yellowish white crystals or crystalline powder

Conforms

Identification

Infrared Absorption

Conforms

Assay

98.5%~101.5%

99.3%

Specific rotation [α]D25

-29.4°~-32.8°

-31.2°

pH

5.5~7.0

5.7

Loss on drying

≤0.30%

0.15%

Residue on ignition

≤0.10%

0.08%

Chloride(Cl)

≤0.05%

<0.05%

Sulfate(SO4)

≤0.03%

<0.03%

Iron(Fe)

≤0.003%

<0.003%

Heavy metals, as Pb

≤0.0015%

<0.0015%

Organic volatile impurities

Meets the requirements

Conforms