Allopurinol

Allopurinol is a xanthine oxidase inhibitor that reduces uric acid production by blocking purine catabolism, making it a first-line therapy for chronic gout and hyperuricemia. Simson Pharma's Allopurinol reference standard and impurities support the compendial and stability-indicating testing demanded of this widely prescribed generic.

Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) supply high-quality Allopurinol Reference Standards, pharmacopoeial reference materials, and its related impurities to pharmaceutical manufacturers, CROs, analytical laboratories, universities, and regulatory organizations worldwide. To service the Europe and America market efficiently, Simson Pharma Limited has set up Simson Pharma Global Ltd. in United Kingdom and Simson Pharma Global LLC in USA respectively.

Pharmaceutical Reference Standards / Impurity Standards

Allopurinol
Allopurinol
  • CAT. No.A170000
  • CAS. No.315-30-0
  • Mol. F.C5H4N4O
  • Mol. W.136.11 g/mol
  • Stock Status:Instock
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Allopurinol EP Impurity A
Allopurinol EP Impurity A
  • CAT. No.A170001
  • CAS. No.5334-31-6
  • Mol. F.C4H6N4O
  • Mol. W.126.12 g/mol
  • Stock Status:Instock
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Allopurinol EP Impurity B
Allopurinol EP Impurity B
  • CAT. No.A170002
  • CAS. No.22407-20-1
  • Mol. F.C5H6N4O2
  • Mol. W.154.13 g/mol
  • Stock Status:Instock
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Allopurinol EP Impurity B Monohydrate
Allopurinol EP Impurity B Monohydrate
  • CAT. No.A170002B
  • CAS. No.22407-20-1(Free base)
  • Mol. F.C5H8N4O3
  • Mol. W.172.14 g/mol
  • Stock Status:Instock
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Allopurinol EP Impurity C
Allopurinol EP Impurity C
  • CAT. No.A170003
  • CAS. No.1346604-13-4
  • Mol. F.C6H6N6O
  • Mol. W.178.15 g/mol
  • Stock Status:Instock
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Allopurinol EP Impurity D
Allopurinol EP Impurity D
  • CAT. No.A170004
  • CAS. No.6994-25-8
  • Mol. F.C6H9N3O2
  • Mol. W.155.15 g/mol
  • Stock Status:Instock
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Allopurinol EP Impurity E
Allopurinol EP Impurity E
  • CAT. No.A170005
  • CAS. No.31055-19-3
  • Mol. F.C7H9N3O3
  • Mol. W.183.16 g/mol
  • Stock Status:Instock
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Allopurinol USP Related Compound F
Allopurinol USP Related Compound F
  • CAT. No.A170006
  • CAS. No.321571-07-7
  • Mol. F.C12H14N4O4
  • Mol. W.278.26 g/mol
  • Stock Status:Instock
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Allopurinol Related Compound A
Allopurinol Related Compound A
  • CAT. No.A170009
  • CAS. No.27511-79-1(freebase)
  • Mol. F.C4H6N4O.1/2H2O4S.1/2H2O
  • Mol. W.184.17 g/mol
  • Stock Status:Instock
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Oxypurinol
Oxypurinol
  • CAT. No.A170010
  • CAS. No.2465-59-0
  • Mol. F.C5H4N4O2
  • Mol. W.152.11 g/mol
  • Stock Status:Instock
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3-Morpholino-2-cyanoacrylamide
3-Morpholino-2-cyanoacrylamide
  • CAT. No.A170011
  • CAS. No.NA
  • Mol. F.C8H11N3O2
  • Mol. W.181.19 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol Riboside
Allopurinol Riboside
  • CAT. No.A170013
  • CAS. No.16220-07-8
  • Mol. F.C10H12N4O5
  • Mol. W.268.23 g/mol
  • Stock Status:Instock
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2-Cyano-3-Ethoxy-Acrylic Acid Ethyl Ester
2-Cyano-3-Ethoxy-Acrylic Acid Ethyl Ester
  • CAT. No.A170014
  • CAS. No.94-05-3
  • Mol. F.C8H11NO3
  • Mol. W.169.18 g/mol
  • Stock Status:Instock
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Allopurinol Impurity 3
Allopurinol Impurity 3
  • CAT. No.A170015
  • CAS. No.NA
  • Mol. F.C6H5N3O
  • Mol. W.135.12 g/mol
  • Stock Status:Instock
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1-Nitroso-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
1-Nitroso-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
  • CAT. No.A170017
  • CAS. No.NA
  • Mol. F.C5H3N5O2
  • Mol. W.165.10 g/mol
  • Stock Status:Custom Synthesis
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(E)-2-cyano-3-(dimethylamino)acrylamide
(E)-2-cyano-3-(dimethylamino)acrylamide
  • CAT. No.A170018
  • CAS. No.NA
  • Mol. F.C6H9N3O
  • Mol. W.139.16 g/mol
  • Stock Status:Custom Synthesis
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(Z)-2-Cyano-3-Morpholinoacrylamide
(Z)-2-Cyano-3-Morpholinoacrylamide
  • CAT. No.A170019
  • CAS. No.NA
  • Mol. F.C8H11N3O2
  • Mol. W.181.19 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol Impurity 2
Allopurinol Impurity 2
  • CAT. No.A170021
  • CAS. No.NA
  • Mol. F.C5H6N4O2.HCl
  • Mol. W.190.59 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol Impurity 5
Allopurinol Impurity 5
  • CAT. No.A170022
  • CAS. No.4862-18-4
  • Mol. F.C6H12N4O3
  • Mol. W.188.18 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol EP Impurity A Sulfate
Allopurinol EP Impurity A Sulfate
  • CAT. No.A170023
  • CAS. No.NA
  • Mol. F.2(C4H6N4O).H2O4S
  • Mol. W.350.31 g/mol
  • Stock Status:Instock
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Allopurinol N-Nitroso Pyrazole amide Impurity
Allopurinol N-Nitroso Pyrazole amide Impurity
  • CAT. No.A170024
  • CAS. No.NA
  • Mol. F.C4H5N5O2
  • Mol. W.155.11 g/mol
  • Stock Status:Custom Synthesis
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N-Nitroso Allopurinol Impurity B
N-Nitroso Allopurinol Impurity B
  • CAT. No.A170025
  • CAS. No.NA
  • Mol. F.C5H5N5O3
  • Mol. W.183.13 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol Nitroso Impurity 1
Allopurinol Nitroso Impurity 1
  • CAT. No.A170026
  • CAS. No.NA
  • Mol. F.C6H7N7O2
  • Mol. W.209.17 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol Nitroso Impurity 2
Allopurinol Nitroso Impurity 2
  • CAT. No.A170027
  • CAS. No.NA
  • Mol. F.C6H8N4O3
  • Mol. W.184.15 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol Nitroso Impurity 3
Allopurinol Nitroso Impurity 3
  • CAT. No.A170028
  • CAS. No.NA
  • Mol. F.C7H8N4O4
  • Mol. W.212.16 g/mol
  • Stock Status:Custom Synthesis
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Isotope Labelled Compounds

Allopurinol-D2
Allopurinol-D2
  • CAT. No.A170007
  • CAS. No.916979-34-5
  • Mol. F.C5H2D2N4O
  • Mol. W.138.12 g/mol
  • Stock Status:Instock
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Oxypurinol 13C,15N2
Oxypurinol 13C,15N2
  • CAT. No.A170008
  • CAS. No.NA
  • Mol. F.C413CH4N215N2O2
  • Mol. W.155.09 g/mol
  • Stock Status:Limited Stock
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Allopurinol-13C,15N2
Allopurinol-13C,15N2
  • CAT. No.A170012
  • CAS. No.NA
  • Mol. F.C413CH4N215N2O
  • Mol. W.139.09 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol-13C,15N2, D2
Allopurinol-13C,15N2, D2
  • CAT. No.A170016
  • CAS. No.2465-59-0unlabelled
  • Mol. F.C413CH2D2N215N2O
  • Mol. W.141.1 g/mol
  • Stock Status:Custom Synthesis
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Allopurinol-13C3-15N
Allopurinol-13C3-15N
  • CAT. No.A170020
  • CAS. No.NA
  • Mol. F.C213C3H4N315NO
  • Mol. W.140.08 g/mol
  • Stock Status:Custom Synthesis
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