Item

Standard

Analysis data

Appearance

White crystalline powder

Conforms

State of solution

(Transmittance)

Clear and colorless

Not less than 95.0%

Conforms

98.9%

Chloride (Cl)

Not more than 0.020%

0.012%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.020%

0.005%

Iron (Fe)

Not more than 30ppm

7ppm

Heavy metal(Pb)

Not more than 10ppm

8ppm

Arsenic(As2O3)

Not more than 1ppm

<1ppm

Other amino acids

Chromatographically

Not detectable

Conforms

Loss on drying

Not more than 0.20%

0.15%

Residue on ignition(sulfated)

Not more than 0.15%

0.1%

Assay

98.5 to100.5%

99.0%