Description

white crystals or crystalline powder

Identification

infrared absorption spectrum

Specific rotation [α]_D²⁰

+31.5 to +32.5°

State of solution
(Transmittance)

clear and colorless not less
than 98.0%

Chloride (CI)

not more than 0.020%

Ammonium (NH₄)

not more than 0.02%

Sulfate (SO₄)

not more than 0.020%

Iron (Fe)

not more than 10ppm

Heavy metals (Pb)

not more than 10ppm

Arsenic (As₂O₃)

not more than 1ppm

Other amino acids

conforms

Loss on drying

not more than 0.1%

Residue on ignition
(sulfated)

not more than 0.10%

Assay

99.0 to 100.5%

PH

3.0 to 3.5

Pyrogen

Nonpyrogenic