L Cysteine HCL Mono

Item

Specification(USP*7)

Result

Description

White crystals or crystalline Powder.

Strongly acid taste.,Very soluble in water.

conforms

Identification

Compare the infrared absorption spectrum of the sample with that of the standard by

potassium bromide disc method.

conforms

Specific rotation  [α]*5D

*5.7to*6.8°

*5.8°

Sulfate(SO4)

Not more than  0.*3%

Not more than  0.*1%

Iron(Fe)

Not more than  0.**3%

Not more than  0.**3%

Heavy metals(Pb)

Not more than  0.***5%

Not more than  0.***0%

Loss on drying

8.0to*2.0%

*1.5%

Residue on ignition(sulfated)

Not more than  0.4%

0.1%

O.V.I.

Meets the requirements

Meets the requirements

Assay

*8.5to**1.5%

*9.4%

Chromatographic purity

Not more than 0.5% of any individual impurity is found

Not more than 2.0%of total impurities is found

Match

Conclusion: The product meets the requirements of USP*7.