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Molecular Formula: C₃₂H₅₃N₂O₄.Br

Molecular Weight: 609.69

CAS Registry Number: 119302-91-9

 Standard: EP5.4

Character: Almost white or pale yellow, slightly hygroscopic powder; Freely soluble in water and in anhydrous ethanol; HPLC ,IR,Bromide test comply with the standard;Specific Optical Rotation: +28.5º~+32.0º; Impurity A≤0.2%,Impurity B,C≤0.3%, Impurity D,E,,F,G and H≤0.1%, Unspecified impuirty≤0.1%, Total impurities ≤1.5%; PH 8.9-9.5 for solution S; Appearance of solution: Solution S is clear and not more intensely colored than reference solution BY; Sulphated ash≤0.1%; Water≤4.0%; Chlorides: Not more than 0.5 times the area of the principal peak in the chromatogram obtained with reference solution (b)(0.1%); Heavy metals≤10ppm; Assay 99.0%~101.0%(on anhydrous basis)