Item

Standard

Analysis data

State of solution

(Transmittance)

Clear and colorless

Not less than 95.0%

Conforms

99%

Chloride (Cl)

Not more than 0.020%

0.015%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.020%

0.005%

Iron (Fe)

Not more than 30ppm

6ppm

Heavy metal(Pb)

Not more than 10ppm

9ppm

Arsenic(As2O3)

Not more than 1ppm

<1ppm

Other amino acids

Chromatographically

Not detectable

Conforms

Loss on drying

Not more than 0.20%

0.12%

Residue on ignition(sulfated)

Not more than 0.15%

0.095%

Assay

98.5 to100.5%

99.0%