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.
Allopurinol
Catalogue No.:PA 01 39000
CAS :
Molecular Formula : C5H4N4O
Molecular Weight : 136.11
3-Amino-4-carbamoylpyrazole Hemisulfate
Catalogue No.:PA 01 39010
Molecular Formula : C4H6N4O•0.5H2SO4
Molecular Weight : 175.16
3-(Formylamino)-1H-pyrazole-4-carboxamide
Catalogue No.:PA 01 39020
Molecular Formula : C5H6N4O2
Molecular Weight : 154.13
3-(4H-1,2,4-Triazol-4-yl)-1H-pyrazole-4-carboxamide
Catalogue No.:PA 01 39030
Molecular Formula : C6H6N6O
Molecular Weight : 178.15
Ethyl 3-Amino-4-pyrazolecarboxylate
Catalogue No.:PA 01 39040
Molecular Formula : C6H9N3O2
Molecular Weight : 155.15
3-(Formylamino)-1H-pyrazole-4-carboxylic Acid Ethyl Ester
Catalogue No.:PA 01 39050
Molecular Formula : C7H9N3O3
Molecular Weight : 183.16
Hydrazine
Catalogue No.:PA 01 39060
Molecular Formula : H4N2
Molecular Weight : 32.05
Hydrazine Monohydrochloride
Catalogue No.:PA 01 39061
Molecular Formula : ClH5N2
Molecular Weight : 68.51
3-Amino-4-cyanopyrazole
Catalogue No.:PA 01 39510
Molecular Formula : C4H4N4
Molecular Weight : 108.1
Hydrazine Hydrate
Catalogue No.:PA 27 01358
Molecular Formula : H6N2O
Molecular Weight : 50.06
Allopurinol-d2
Catalogue No.:PA STI 004680
Molecular Formula : C5H2D2N4O
Molecular Weight : 138.12
4,6-Dihydroxypyrazolo[3,4-d]pyrimidine-13C,15N2
Catalogue No.:PA STI 033020
Molecular Formula : C413CH4N215N2O2
Molecular Weight : 155.09
Allopurinol Related Compound B (5-(formylamino)-1H-pyrazole-4-carboxamide) (1013013)
Catalogue No.:PA USP1013013
Molecular Formula : NA
Molecular Weight : NA
Allopurinol Related Compound A (3-Amino-4-carboxamidopyrazole Hemisulfate) (1013024)
Catalogue No.:PA USP1013024
Allopurinol Related Compound E (ethyl 5-(formylamino)-1H-pyrazole-4-carboxylate) (1013068)
Catalogue No.:PA USP1013068
Allopurinol (1013002)
Catalogue No.:PA USP1013002
Allopurinol Related Compound F (ethyl-(E/Z)-3-(2-carbethoxy-2-cyanoethenyl)amino-1H-pyrazole-4-carb (1013079)
Catalogue No.:PA USP1013079
Allopurinol Related Compound D (ethyl 5-amino-1H-pyrazole-4-carboxylate) (1013046)
Catalogue No.:PA USP1013046
allopurinol (870RB)
Catalogue No.:PA BP870RB
allopurinol impurity A (831RB)
Catalogue No.:PA BP831RB
allopurinol impurity B (832RB)
Catalogue No.:PA BP832RB
allopurinol impurity C (843RB)
Catalogue No.:PA BP843RB
allopurinol impurity E (845RB)
Catalogue No.:PA BP845RB
Catalogue No.:PA ICRS0204
Molecular Formula :
Allopurinol Related Compound C (5-(4H-1,2,4-triazol-4-yl)-1H-pyrazole-4-carboxamide) (1013035)
Catalogue No.:PA USP1013035
allopurinol impurity D (844RB)
Catalogue No.:PA BP844RB
Allopurinol (A0350000)
Catalogue No.:PA EPA0350000
Allopurinol impurity A (A0350010)
Catalogue No.:PA EPA0350010
Allopurinol impurity B (A0350020)
Catalogue No.:PA EPA0350020
Allopurinol impurity C (A0350030)
Catalogue No.:PA EPA0350030
Allopurinol impurity D (A0350040)
Catalogue No.:PA EPA0350040
Allopurinol impurity E (A0350050)
Catalogue No.:PA EPA0350050
Allopurinol riboside
Catalogue No.:PA 01 39530
Molecular Formula : C10H12N4O5
Molecular Weight : 268.23
Catalogue No.:PA IPIPRS 46 14
Hydrazine Dihydrochloride
Catalogue No.:PA 27 12262
Molecular Formula : Cl2H6N2
Molecular Weight : 104.96
5-Amino-1H-pyrazole-4-carboxamide
Catalogue No.:PA 01 39011
Molecular Formula : C4H6N4O
Molecular Weight : 126.12
Oxypurinol
Catalogue No.:PA 01 0391000
Molecular Formula : C5H4N4O2
Molecular Weight : 152.11
Hydrazine Monohydrate
Catalogue No.:PA 01 0390061
Molecular Formula : N2H4.xH20
(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
Allopurinol Impurity A (IMP/03/17)
Catalogue No.:PA IMP 03 17
N-Nitroso Allopurinol
Catalogue No.:PA 01 0391002
Molecular Formula : C5H3N5O2
Molecular Weight : 165.11
9-Nitroso-9H-purin-6-ol
Catalogue No.:PA 01 0391003
Allopurinol (IPRSA033)
Catalogue No.:PA IPRSA033
Allopurinol Impurity B (IMPF019)
Catalogue No.:PA IMPF019
Allopurinol Impurity C (IMPA014)
Catalogue No.:PA IMPA014
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