Item

Index

Appearance

White crystalline powder

Identification

Positive reaction

Assay(calculated on the anhydrous)

≥98%

Ph(1 in 10)

3.5~4.5

Melting point 

103℃~107.5℃

Water

≤0.25%

Residue on ignition

≤0.05%

Heavy metals

≤10mg/kg

Arsenic

≤2mg/kg

Cadmium

≤0.3mg/kg

Chromium

≤2mg/kg

Lead

≤0.3mg/kg

Mercury

≤0.2mg/kg

1,4-Dioxane

Passes test

Total plate count

≤1000cfu/g

Yeast and mold

≤100cfu/g

E.Coli

Negative

Salmonella

Negative

Staphylococcus aureus

Negative

Particle Size

Through 20 mesh