Items

Specification

Results

BP2012

Appearance

A white or almost white, crystalline powder or small, colorless crystals

White crystalline powder

Identification

Meet the requirements

Comply

Appearance of solution

Clear, not more intense than Y7 or GY7

Comply

pH

2.7-3.3

3.0

Water

≤ 5.0%

1.60%

Sulphated ash

≤ 0.1%

0.06%

Heavy metals

≤ 20ppm

<10ppm

Sulphates

≤ 300ppm

Comply

Any impurity

≤0.40 %

0.13%

Total impurities

≤1.0%

0.41%

Assay

98.0%-101.0%

99.4%

USP34

Identification

Meet the requirements

Comply

pH

2.7-3.4

3.0

Water

≤ 5.0%

1.60%

Residue on ignition

≤ 0.2%

0.06%

Absorbance of solution

≤ 0.025%

Comply

Limit of nitrate

Meet the requirement

Comply

Chromatographic purity

Meet the requirement

Comply

Residual solvent

Methanol

Ethanol

≤ 0.3%

≤ 0.5%

Not detected

0.03%

Assay

98.0%-102.0%

99.4%

Conclusion: All the results conform to the BP2012 and USP34.