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    Allopurinol Impurity B

    Allopurinol Impurity B

    Synonym

    5-formamido-1H-pyrazole-4-carboxamide

    Molecular Formula

    C5H6N4O2

    Molecular Weight

    154.13

    Catalogue Number

    AR-A01664

    Parent Drug

    ALLOPURINOL

    CAS Number

    22407-20-1

    Collections: ALLOPURINOL

    Category: 22407-20-1, ALLOPURINOL, AR-A01664, C5H6N4O2

    RELATED PRODUCTS
    5-((3-amino-2-cyano-3-oxoprop-1-en-1-yl)amino)-1H-pyrazole-4-carboxamide

    Synonym

    5-((3-amino-2-cyano-3-oxoprop-1-en-1-yl)amino)-1H-pyrazole-4-carboxamide

    Molecular Formula

    C8H8N6O2

    Molecular Weight

    220.19

    Catalogue Number

    AR-A01671

    Parent Drug

    ALLOPURINOL
    Allopurinol-13C2-15N

    Synonym

    1H-pyrazolo[3,4-d]pyrimidin-4(2H)-one-13C3 15N

    Molecular Formula

    13C315N C2H4N3O

    Molecular Weight

    140.08

    Catalogue Number

    AR-A01670

    Parent Drug

    ALLOPURINOL

    CAS Number

    315-30-0 (non-labelled)
    Oxypurinol-13C-15N2

    Synonym

    4,6-Dihydroxypyrazolo[3,4-d]pyrimidine-13C,15N2

    Molecular Formula

    C₄¹³CH₄N₂¹⁵N₂O₂

    Molecular Weight

    155.09

    Catalogue Number

    AR-A01669

    Parent Drug

    Oxypurinol

    CAS Number

    1217036-71-9 (labelled); alt. cas#: 2465-59-0 (unlabelled)
    Allopurinol Impurity F (Mixture of Z and E Isomers)

    Synonym

    ethyl 5-((2-cyano-3-ethoxy-3-oxoprop-1-en-1-yl)amino)-1H-pyrazole-4-carboxylate

    Molecular Formula

    C12H14N4O4

    Molecular Weight

    278.27

    Catalogue Number

    AR-A01668

    Parent Drug

    ALLOPURINOL

    CAS Number

    321571-07-7
    Allopurinol Impurity E

    Synonym

    ethyl 5-formamido-1H-pyrazole-4-carboxylate

    Molecular Formula

    C7H9N3O3

    Molecular Weight

    183.17

    Catalogue Number

    AR-A01667

    Parent Drug

    ALLOPURINOL

    CAS Number

    31055-19-3
    Allopurinol Impurity D

    Synonym

    ethyl 5-amino-1H-pyrazole-4-carboxylate

    Molecular Formula

    C6H9N3O2

    Molecular Weight

    155.16

    Catalogue Number

    AR-A01666

    Parent Drug

    ALLOPURINOL

    CAS Number

    6994-25-8
    Allopurinol EP Impurity C

    Synonym

    5-(4H-1,2,4-triazol-4-yl)-1H-pyrazole-4-carboxamide

    Molecular Formula

    C6H6N6O

    Molecular Weight

    178.16

    Catalogue Number

    AR-A01665

    Parent Drug

    ALLOPURINOL

    CAS Number

    1346604-13-4
    Allopurinol EP Impurity A

    Synonym

    5-amino-1H-pyrazole-4-carboxamide

    Molecular Formula

    C4H6N4O

    Molecular Weight

    126.12

    Catalogue Number

    AR-A01663

    Parent Drug

    ALLOPURINOL

    CAS Number

    5334-31-6
    4,6-Dihydroxypyrazolo[3,4-d]pyrimidine (Oxypurinol)

    Synonym

    1H-pyrazolo[3,4-d]pyrimidine-4,6(2H,5H)-dione

    Molecular Formula

    C5H4N4O2

    Molecular Weight

    152.11

    Catalogue Number

    AR-A01662

    Parent Drug

    ALLOPURINOL

    CAS Number

    2465-59-0
    Allopurinol-d2

    Synonym

    3,6-dideuterio-1,2-dihydropyrazolo[3,4-d]pyrimidin-4-one

    Molecular Formula

    C5H2N4OD2

    Molecular Weight

    138.13

    Catalogue Number

    AR-A01661

    Parent Drug

    ALLOPURINOL

    CAS Number

    916979-34-5
    Allopurinol

    Synonym

    1H-pyrazolo[3,4-d]pyrimidin-4(2H)-one

    Molecular Formula

    C5H4N4O

    Molecular Weight

    136.11

    Catalogue Number

    AR-A01660

    Parent Drug

    ALLOPURINOL

    CAS Number

    315-30-0