Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

conforms

Specific rotation[α]20/D
(C=8 in 6N HCl)

+24.8°to +25.8°

25.20°

State of solution
(Transmittance)

Clear and colorless not less than 98.0%

98.4%

Chloride (Cl)

Not more than 0.020%

<0.020%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.020%

<0.020%

Iron (Fe)

Not more than 10ppm

<10ppm

Heavy metal(Pb)

Not more than 10ppm

<10ppm

Arsenic(As2O3)

Not more than 1ppm

<1ppm

Other Amino Acids

Chromatographically
Not detectable

conforms

Loss on drying

Not more than 0.20%

0.06%

Residue on ignition(sulfated)

Not more than 0.10%

0.09%

Assay

98.5% to 101.0%

98.96%

pH

2.5 to 3.5

2.98