Items

StandardEnterprise

Standard(USP)

Appearance

White CrystallinePowder

Specific Optical Rotation

+52°+56°

+52°+54°

pH

4.004.50

3.005.00

Iron

≤10PPM

Heavy Metals

≤10PPM

≤10PPM

Loss On Drying

≤0.50%

≤1.00%

Assay

99.0101.0%

98.0%-102.0%(calculated on the dried basis)

Residue on Ignition

23.825.7%

23.525.0%

Chloride

≤14.00%

Sulfate

16.3%-17.3%

Organic volatile impurities

meets the requirements

MicrobiologicalTest Total Plate CountYeast&MoldSalmonellaColiforms

MAX500/gMAX100/gNegativeNegative

Package and storage

Preserve in tight,light-resistant containers

Expriy date

Two years