Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

conforms

Specific rotation[α]20/D

(C=2,H2O)

+14.0°to+17.0°

+14.98°

Transmittance

Not less than 95.0%

98.1%

Heavy metal(Pb)

Not more than 20ppm

<10ppm

Iron (Fe)

Not more than 10ppm

9ppm

Arsenic(As2O3)

Not more than 2ppm

<2ppm

Chloride (Cl)

Not more than 0.020%

0.008%

Sulfate (SO4)

Not more than 0.10%

0.005%

Other amino acids

Chromatographically    not  detectable

conforms

Loss on drying

Not more than 0.50%

0.20%

Residue on ignition

Not more than 0.30%

0.1%

Assay

98.0to102.0%

98.5%

pH

1.7to2.8

2.3

Conclusion

The product is according with standard.