Specifications (USP23 )

Appearance

White crystalline powder

Assay (C3H7NO2),%(on dry matter)

98.5~101.0 <>

Specific rotation

+14.3°~+15.2°

Loss on drying, %

≤0.2

Transmittance, % 

≥98.0

Chloride (as Cl), %

≤0.02

Sulfate (as SO4), %

≤0.02

Ammonium as (as NH4), %

≤0.02

Iron (as Fe), %

 ≤0.001

Heavy Metals (as Pb), %

 ≤0.001

Arsenic (as As), %

  ≤0.0001

pH Value

   5.7~6.7

Residue on ignition, %

≤0.1

Other amino acid

   No detd