Impurity Reference Standard - Products

Allopurinol

CAT No: CL-ALP-01 CAS No: 315-30-0 Mol Wt: 136.1 Mol F: C5H4N4O Inv Status: In Stock

Chemical Name: 1,5-Dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (as per EP & USP)

Allopurinol EP Impurity A

CAT No: CL-ALP-02 CAS No: 5334-31-6 Mol Wt: 126.1 Mol F: C4H6N4O Inv Status: In Stock

Chemical Name: 5-Amino-1H-pyrazole-4-carboxamide

Allopurinol EP Impurity B

CAT No: CL-ALP-03 CAS No: 22407-20-1 Mol Wt: 154.1 Mol F: C5H6N4O2 Inv Status: In Stock

Chemical Name: 5-(Formylamino)-1H-pyrazole-4-carboxamide (as per EP & USP)

Allopurinol EP Impurity C

CAT No: CL-ALP-04 CAS No: 1346604-13-4 Mol Wt: 178.2 Mol F: C6H6N6O Inv Status: Custom Synthesis

Chemical Name: 5-(4H-1,2,4-Triazol-4-yl)-1H-pyrazole-4-carboxamide (as per EP & USP)

Allopurinol EP Impurity D

CAT No: CL-ALP-05 CAS No: 6994-25-8 Mol Wt: 155.2 Mol F: C6H9N3O2 Inv Status: In Stock

Chemical Name: Ethyl 5-amino-1H-pyrazole-4-carboxylate (as per EP & USP)

Allopurinol EP Impurity E

CAT No: CL-ALP-06 CAS No: 31055-19-3 Mol Wt: 183.2 Mol F: C7H9N3O3 Inv Status: In Stock

Chemical Name: Ethyl 5-(formylamino)-1H-pyrazole-4-carboxylate (as per EP & USP)

Allopurinol EP Impurity F

CAT No: CL-ALP-07 CAS No: 302-01-2 Mol Wt: 32.1 Mol F: H4N2 Inv Status: Custom Synthesis

Chemical Name: Diazane

Allopurinol Nitrile Impurity

CAT No: CL-ALP-08 CAS No: 16617-46-2 Mol Wt: 108.1 Mol F: C4H4N4 Inv Status: In Stock

Chemical Name: 3-Amino-1H-pyrazole-4-carbonitrile ; 3-Amino-1H-pyrazole-4-carbonitrile; 3-Amino-4-pyrazolecarbonitrile

Allopurinol USP RC F

CAT No: CL-ALP-09 CAS No: 321571-07-7 Mol Wt: 278.3 Mol F: C12H14N4O4 Inv Status: Custom Synthesis

Chemical Name: 3-[(2-Cyano-3-ethoxy-3-oxo-1-propen-1-yl)amino]-1H-pyrazole-4-carboxylic Acid Ethyl Ester

Allopurinol USP Impurity

CAT No: CL-ALP-10 CAS No: NA Mol Wt: 278.3 Mol F: C12H14N4O4 Inv Status: Custom Synthesis

Chemical Name: Ethyl-(E/Z)-3-(2-carbethoxy-2-cyanoethenyl)amino-1H-pyrazole-4-carboxylate (as per USP)

Allopurinol Impurity 1

CAT No: CL-ALP-11 CAS No: NA Mol Wt: 220.2 Mol F: C8H8N6O2 Inv Status: Custom Synthesis

Chemical Name: (E)-3-((3-Amino-2-cyano-3-oxoprop-1-en-1-yl)amino)-1H-pyrazole-4-carboxamide

Allopurinol Impurity 2

CAT No: CL-ALP-12 CAS No: 147156-43-2 Mol Wt: 154.1 : 36.5 Mol F: C5H6N4O2 : HCl Inv Status: Custom Synthesis

Chemical Name: 4-Formamido-1H-imidazole-5-carboxamide hydrochloride

Allopurinol Nitrile Hydrochloride Impurity

CAT No: CL-ALP-13 CAS No: 478081-97-9 Mol Wt: 108.1 : 36.5 Mol F: C4H4N4 : HCl Inv Status: Custom Synthesis

Chemical Name: 3-Amino-1H-pyrazole-4-carbonitrile Hydrochloride

Oxypurinol

CAT No: CL-ALP-14 CAS No: 2465-59-0 Mol Wt: 152.1 Mol F: C5H4N4O2 Inv Status: Custom Synthesis

Chemical Name: 1,7-Dihydro-4H-pyrazolo[3,4-d]pyrimidine-4,6(5H)-dione

Allopurinol D2

CAT No: CL-ALP-15 CAS No: 916979-34-5 Mol Wt: 138.1 Mol F: C5H2D2N4O Inv Status: Custom Synthesis

Chemical Name: 1,7-Dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one-3,6-d2

Allopurinol-13C,15N2

CAT No: CL-ALP-16 CAS No: NA Mol Wt: 139.1 Mol F: C413CH4N215N2O Inv Status: Custom Synthesis

Chemical Name: 1,5-Dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one-6-13C-1,2-15N2

Oxipurinol 13C,15N2

CAT No: CL-ALP-17 CAS No: 1217036-71-9 Mol Wt: 155.1 Mol F: C413CH4N215N2O2 Inv Status: Custom Synthesis

Chemical Name: 1,7-Dihydro-4H-pyrazolo[5,4-d]pyrimidine-4,6(5H)-dione-3-13C-1,2-15N2

Type:Impurity Reference Standard

API NAME:Allopurinol

Total Products: 17

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