Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

Conforms

State of solution

(Transmittance)

Clear and colorless

not less than 98.0%

98.0%

Chloride (Cl)

Not more than 0.020%

<0.02%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.020%

<0.02%

Iron (Fe)

Not more than 10ppm

7ppm

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 0.30%

0.2%

Residue on ignition(sulfated)

Not more than 0.10%

0.08%

Assay

99.0% to 100.5%

99.0%

pH

5.6 to 6.1

5.8