Item

Standard

Appearance

White crystals or crystalline powder

Specific rotation(a)D20

-74.0º to –77.0º

Transmittance

Not less than 95.0%

Chloride(C1)

Not more than 0.02%

Ammonium(NH4)

Not more than 0.02%

Heavy metals(Pb)

Not more than 10ppm

Iron(Fe)

Not more than 10ppm

Arsenic(As2O3)

Not more than 1 PPM

Other Amino Acids

Conforms

Loss on drying

Not more than 0.20%

Residue on ignition

Not more than 0.1%

Assay

98.5-101.0%

PH

5.0～6.5