Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

Conforms

State of solution
(Transmittance)

Clear and colorless
Not less than 95.0%

Conforms
96.0%

Chloride (Cl)

Not more than 0.04%

<0.04%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Iron (Fe)

Not more than 30ppm

<30ppm

Heavy metal(Pb)

Not more than 10ppm

<10ppm

Arsenic(As2O3)

Not more than 2ppm

<2ppm

Other amino acids

No spot

Conforms

Loss on drying

Not more than 0.60%

0.5%

Residue on ignition(sulfated)

Not more than 0.20%

0.15%

Assay

98.0 to101.0%

99.2%

pH

2.5 to 3.5

3.1