Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

conforms

State of solution
(Transmittance)

Clear and colorless not less than 98.0%

Conforms
98.5%

Specific rotation[α]20/D
(C=10 in 2N HCl)

+31.5 to +32.5°

+31.92°

Chloride (Cl)

Not more than 0.020%

<0.020%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.020%

<0.020%

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 0.20%

0.10%

Residue on ignition(sulfated)

Not more than 0.10%

0.08%

Assay

99.0% to 100.5%

99.46%

pH

3.0 to 3.5

3.28

Conclusion

The product is according with standard.