Item

Standard

Appearance

White, crystalline platelets or powder

State of solution

(Transmittance)

Clear and colorless not less than 98.0%

Chloride (Cl)

Not more than 0.020%

Ammonium(NH4)

Not more than 0.020%

Sulfate (SO4)

Not more than 0.020%

Iron(Fe)

Not more than 10ppm

Heavy metal(Pb)

Not more than 10ppm

Arsenic(As2O3)

Not more than 1ppm

Other Amino Acids

Chromatographically

Not detectable

Loss on drying

Not more than 0.30%

Residue on ignition(sulfated)

Not more than 0.10%

Assay

99.0% to 101.0%

pH

5.6 to 6.1