Betahistine dihydrochloride

A white or almost white crystalline powder  

IR should comply with the reference standard  

Impurity A: ≤0.2%Impurity B: ≤0.2%Impurity C: ≤0.2%

Any other impurity: ≤0.1%

Total impurity: ≤0.5%  

Very soluble in water and 96% ethanol; practically insoluble in 2-propanol  

Clarity of solution (0.1g in 10ml carbon dioxide free water)   Clear    

pH :2.0～3.0  

Loss on drying≤1.0%  

Residue on ignition≤0.1%  

Sulphate ash≤0.1%  

Assay≥99.0%  

Vasodilators; Used for cure of Meniere's disease.