|Molecular Formula: ||C5H4N4O|
|Molecular Weight: ||136.1|
Allopurinol is a white or almost white powder. It is very slightly soluble in water and in ethanol (96 per cent). It dissolves in dilute solutions of alkali hydroxides.
Allopurinol is an anti-gout drug. It is suitable for various diseases such as gout, acute or chronic leukemia, which are primary or secondary serum uric acid.
|Appearance||White or almost white powder.|
|Heavy metals||≤20 ppm|
|Loss on drying||≤0.5%|
Sum of impurities other than 5- amino-1H-pyrazole-4-carboxamide,5-(formylamino)-1H-pyrazole-4-
carboxamide and 5-(4H-1,2,4- triazol-4-yl)-1H-pyrazole-4-carboxamide
|Ethyl 5-amino-1H-pyrazole-4- carboxylate ||≤0.1%|
|Ethyl 5-(formylamino)-1Hpyrazole -4-carboxylate||≤0.1%|
|Hydrazine||10 ppm of hydrazine sulfate|
|Equivalent to 2.5 ppm of hydrazine|
Packing and Storage
Preserve in well-closed containers. Store at room temperature.