Appearance

White crystals or crystalline powder

Conforms

Specific rotation[α]20/D

(C=8 in 6N HCl)

+27.5to +29.5 Degree

27.75Degree

Chloride (Cl)

Not more than 0.040%

<0.04%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.030%

<0.03%

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 11.4%

1.5%

Residue on ignition(sulfated)

Not more than 0.20%

0.1%

Assay

98.0% to 102%

98.5%

pH

6.0 to 7.5

7.2