allopurinol
Allopurinol is a purine analog and it is a structural isomer of hypoxanthine. It is an inhibitor of the enzyme xanthine oxidase. Allopurinol is used to treat excess uric acid in the blood and gout. It is sold under the brand name Zyloprim. Reference standards of Allopurinol API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
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[pname] => Allopurinol
[catalogue_number] => PA 01 39000
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[weight] => 136.11
[form] => C5H4N4O
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Catalogue No.:PA 01 39000
Molecular Formula : C5H4N4O
Molecular Weight : 136.11
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[pname] => Allopurinol - Impurity A
[catalogue_number] => PA 01 39010
[category_ids] => ,82,80,79,78,71,70,
[chemical_name] =>
[weight] => 175.16
[form] => C4H6N4O•0.5H2SO4
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Catalogue No.:PA 01 39010
Molecular Formula : C4H6N4O•0.5H2SO4
Molecular Weight : 175.16
stdClass Object
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[pname] => Allopurinol - Impurity B
[catalogue_number] => PA 01 39020
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[chemical_name] =>
[weight] => 154.13
[form] => C5H6N4O2
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Catalogue No.:PA 01 39020
Molecular Formula : C5H6N4O2
Molecular Weight : 154.13
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[pname] => Allopurinol - Impurity C
[catalogue_number] => PA 01 39030
[category_ids] => ,80,82,78,70,71,83,85,
[chemical_name] =>
[weight] => 178.15
[form] => C6H6N6O
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Catalogue No.:PA 01 39030
Molecular Formula : C6H6N6O
Molecular Weight : 178.15
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[pname] => Allopurinol - Impurity E
[catalogue_number] => PA 01 39050
[category_ids] => ,85,83,71,70,78,82,
[chemical_name] =>
[weight] => 183.16
[form] => C7H9N3O3
[cas] => 31055-19-3
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Catalogue No.:PA 01 39050
Molecular Formula : C7H9N3O3
Molecular Weight : 183.16
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[catalogue_number] => PA STI 004680
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[chemical_name] =>
[weight] => 138.12
[form] => C5H2D2N4O
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Catalogue No.:PA STI 004680
Molecular Formula : C5H2D2N4O
Molecular Weight : 138.12
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[catalogue_number] => PA STI 033020
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[weight] => 155.09
[form] => C413CH4N215N2O2
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4,6-Dihydroxypyrazolo[3,4-d]pyrimidine-13C,15N2
Catalogue No.:PA STI 033020
Molecular Formula : C413CH4N215N2O2
Molecular Weight : 155.09
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[pname] => Allopurinol riboside
[catalogue_number] => PA 01 39530
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[chemical_name] =>
[weight] => 268.23
[form] => C10H12N4O5
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Catalogue No.:PA 01 39530
Molecular Formula : C10H12N4O5
Molecular Weight : 268.23
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[catalogue_number] => PA 01 39011
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[weight] => 126.12
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Allopurinol - Impurity A (Freebase)
Catalogue No.:PA 01 39011
Molecular Formula : C4H6N4O
Molecular Weight : 126.12
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[pname] => Oxypurinol
[catalogue_number] => PA 01 0391000
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Catalogue No.:PA 01 0391000
Molecular Formula : C5H4N4O2
Molecular Weight : 152.11
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[catalogue_number] => PA 01 0390061
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[weight] => NA
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Allopurinol - Impurity F (Hydrate)
stdClass Object
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[catalogue_number] => PA 01 0391001
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[chemical_name] =>
[weight] => 278.26
[form] => C12H14N4O4
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(E/Z)-3-[(2-Cyano-3-ethoxy-3-oxo-1-propenyl)amino]-1H-Pyrazole-4-carboxylic Acid Ethyl Ester
Catalogue No.:PA 01 0391001
Molecular Formula : C12H14N4O4
Molecular Weight : 278.26
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[pname] => Allopurinol Impurity A (IMP/03/17)
[catalogue_number] => PA IMP 03 17
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Allopurinol Impurity A (IMP/03/17)
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[pname] => N-Nitroso Allopurinol
[catalogue_number] => PA 01 0391002
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[weight] => 165.11
[form] => C5H3N5O2
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Catalogue No.:PA 01 0391002
Molecular Formula : C5H3N5O2
Molecular Weight : 165.11
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[catalogue_number] => PA 01 0391003
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Catalogue No.:PA 01 0391003
Molecular Formula : C5H3N5O2
Molecular Weight : 165.11
stdClass Object
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[catalogue_number] => PA 01 0391004
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[weight] => 141.13
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3-Amino-1H-pyrazole-4-carbohydrazide
Catalogue No.:PA 01 0391004
Molecular Formula : C4H7N5O
Molecular Weight : 141.13
stdClass Object
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[catalogue_number] => PA 01 0391005
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[weight] => 272.23
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Allopurinol-Hypoxanthine Mixture
Catalogue No.:PA 01 0391005
Molecular Formula : C10H8N8O2
Molecular Weight : 272.23
stdClass Object
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5-Amino-1-nitroso-1H-pyrazole-4-carboxamide
Catalogue No.:PA 01 0391006
Molecular Formula : C4H5N5O2
Molecular Weight : 155.12
stdClass Object
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[weight] => 183.13
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5-Formamido-1-nitroso-1H-pyrazole-4-carboxamide
Catalogue No.:PA 01 0391007
Molecular Formula : C5H5N5O3
Molecular Weight : 183.13
stdClass Object
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[weight] => 184.16
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Ethyl 5-amino-1-nitroso-1H-pyrazole-4-carboxylate
Catalogue No.:PA 01 0391008
Molecular Formula : C6H8N4O3
Molecular Weight : 184.16
stdClass Object
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[weight] => 212.17
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Ethyl 5-formamido-1-nitroso-1H-pyrazole-4-carboxylate
Catalogue No.:PA 01 0391009
Molecular Formula : C7H8N4O4
Molecular Weight : 212.17
