Item

Standard

Appearance

White crystals or crystalline powder

Specific rotation[α]20/D(C=10,2mol/L HCL)

+25.2 to +25.8°

+31.4 to +32.2°

calc.as glutamic acid

State of solution

(Transmittance)

Clear and colorless

Not less than 98.0%

Chloride (Cl)

19.11 to 19.50%

Ammonium (NH4)

Not more than 0.02%

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 0.50%

Residue on ignition(sulfated)

Not more than 0.10%

Assay

99.0 to101.0%

pH

1.0 to 2.0