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Product Description

Cas: 50-56-6
Purity (by HPLC): More than 98.50%
Single impurity: Less than 0.50%
Appearance(EP. Curr. Ed):  White or almost white, hygroscopic powder
Solubility(EP. Curr. Ed):  Very soluble in water,It dissolves in diluteSolutions of acetic acid and ethanol(96%).
HPLC(EP. Curr. Ed):  The principal peak in the chromatogram obtained with the test solution is similar in retention time to          

                                 principal  peak in the chromatogram obtained with the reference solution.

Amino acid analysis
(EP. Curr. Ed)Amino acid limits
Asp (0.90-1.10)
Glu (0.90-1.10)
Pro (0.90-1.10)
Gly (0.90-1.10)
Leu (0.90-1.10)
Ile (0.90-1.10)
Tyr (0.7-1.05)
Half-Cys (1.40-2.10)
No more than the traces
Of the other amino acids are present.

PH(EP. Curr. Ed):   3.0-6.0   (200mg OT in 10ml Of CO2 free water)

Related Substances(EP. Curr. Ed):
Specified impurities
Impurity A: NMT 1.0%
Impurity B: NMT 1.5%
Impurity C: NMT1.0%
Any unspecified impurity: NMT 5%
Total impurity: NMT 5%

Acetic acid(EP. Curr. Ed): 6%-10%

Water(EP. Curr. Ed): NMT 5%

Bacterial Endotoxins(EP. Curr. Ed): Less than 300IU/mg

Assay(EP. Curr. Ed): 93%-102%

Biological activity: Not less than 480IU/mg

Specific Optical Rotation: -19.5 to -23.5

Residual solvent
Methanol: NMT 3000ppm
Acetonitrile: NMT 410ppm

Triethylamine: NMT 320ppm