Testing Item

Standard

Yellow Crystalline Powder

Appearance

White or off-white crystalline powder

conforms

Assay (on dry basis)

97.5%~100.5%

98.74%

Melting Point

229℃~232℃, in-house

230.0~~231.5℃

Specific Rotation

+89~+93°

+90.89°

Individual impurity

s1.0%

0.51%

Total impurities

<2.0%

1.34%

Loss on Drying

≤0.1%, in-house

0.03%

Sulfated ash

<0.1%, in-house

0.05%

Heavy Metal

s0.001%, in-house

<0.001%

Arsenic

s0.0003%, in-house

<0.0001%