Outside Appearance:

white to white –ivory fine powder

Clarity:

0.35 420nm max

Specific Optical rotation:

-35° ~ -20°

PH Value:

5.5-7.5

Nitrogen:

2.5-3.8%

Protein:

3.0% max

Residue on ignition:

20-30%

Sulfide:

5.0-7.0%

Chloride:

1.0% max

Heavy metals:

10ppm max

Arsenic:

2ppm max

Density:

0.6g/ml min

Loss on drying

10% max

Assay (HPLC, on dried basis):

90.0% (CPC) min