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Pharmaceutical Impurity Reference Standards

Process impurities, degradation products and genotoxic impurity reference standards with full characterization.

Rebamipide impurity 02 structure

Rebamipide impurity 02

CAS: 1984832-92-9

In Stock97%+

Rebamipide impurity 03 structure

Rebamipide impurity 03

CAS: 681806-75-7

In Stock97%+

Bupropion impurity 01 TFA structure

Bupropion impurity 01 TFA

CAS: 119802-69-6（free base）

In Stock97%+

2-Aminoethyl Nitrate structure

2-Aminoethyl Nitrate

CAS: 646-02-6

In Stock>95%

Allisartan Isoproxil Impurity N2 structure

Allisartan Isoproxil Impurity N2

CAS: 947331-10-4

In Stock97%+

2-Chloro-1-(3-chloro-4-hydroxyphenyl)ethan-1-one structure

2-Chloro-1-(3-chloro-4-hydroxyphenyl)ethan-1-one

CAS: 39066-18-7

In Stock>95%

Meclizine Impurity N2 structure

Meclizine Impurity N2

CAS: 713071-37-5

In Stock97%+

Lidocaine Impurity N4 structure

Lidocaine Impurity N4

CAS: 332903-68-1

In Stock97%+

Oxybutynin Impurity N2 structure

Oxybutynin Impurity N2

CAS: 81039-74-9

In Stock97%+

Primidone EP impurity A hydrate structure

Primidone EP impurity A hydrate

CAS: 80866-90-6

In Stock97%+

Sunitinib Impurity N1 structure

Sunitinib Impurity N1

CAS: 2377533-92-9

In Stock97%+

Axitinib Impurity N27 structure

Axitinib Impurity N27

CAS: 20877-02-5

In Stock97%+

rac-Tamsulosin EP Impurity D structure

rac-Tamsulosin EP Impurity D

CAS: 94666-11-2

In Stock97%+

Guaiacol EP Impurity F structure

Guaiacol EP Impurity F

CAS: 2896-67-5

In Stock97%+

Ethosuximide impurity 01 structure

Ethosuximide impurity 01

CAS: 4172-97-8

In Stock97%+

Fenofibrate Impurity N55 structure

Fenofibrate Impurity N55

CAS: 943-45-3

In Stock97%+

Erlotinib Impurity N54 structure

Erlotinib Impurity N54

CAS: 2055841-67-1

In Stock97%+

3-((Butyryloxy)methyl) 5-methyl 4-(2,4-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (Clevidipine Impurity) structure

3-((Butyryloxy)methyl) 5-methyl 4-(2,4-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (Clevidipine Impurity)

CAS: 2458150-58-6

In Stock97%+

3-(2-(((4-Carbamoylphenyl)amino)methyl)-1-methyl-N-(pyridin-2-yl)-1H-benzo[d]imidazole-5-carboxamido)propanoic acid (Dabigatran Impurity) structure

3-(2-(((4-Carbamoylphenyl)amino)methyl)-1-methyl-N-(pyridin-2-yl)-1H-benzo[d]imidazole-5-carboxamido)propanoic acid (Dabigatran Impurity)

CAS: 2417628-79-4

In Stock97%+

Cloxacillin Impurity N2 structure

Cloxacillin Impurity N2

CAS: 69399-79-7

In Stock97%+

Nitroso Lomustine EP Impurity B structure

Nitroso Lomustine EP Impurity B

CAS: 54749-91-6

In Stock97%+

Articaine Impurity C86 structure

Articaine Impurity C86

CAS: 2169099-30-1

In Stock97%+

Ivabradine impurity N1 structure

Ivabradine impurity N1

CAS: 2511244-96-3

In Stock97%+

Delgocitinib impurity N2 structure

Delgocitinib impurity N2

CAS: 36140-83-7

In Stock97%+

Cefuroxime Impurity C95 structure

Cefuroxime Impurity C95

CAS: 27920-90-7

In Stock97%+

Trelagliptin Impurity N51 structure

Trelagliptin Impurity N51

CAS: 853368-35-1

In Stock97%+

Rimegepant Impurity C38 DiHCl structure

Rimegepant Impurity C38 DiHCl

CAS: 2126178-23-0

In Stock97%+

Vazegepant Impurity N72 structure

Vazegepant Impurity N72

CAS: 855778-84-6

In Stock97%+

Butylphthalide Impurity C165 structure

Butylphthalide Impurity C165

CAS: 4767-54-8

In Stock97%+

Progesterone Impurity N7 structure

Progesterone Impurity N7

CAS: 80699-76-9

In Stock97%+

Duloxetine Impurity 57 structure

Duloxetine Impurity 57

CAS: 763079-11-4

In Stock97%+

Trimethoprim EP Impurity J-D9 structure

Trimethoprim EP Impurity J-D9

CAS: 84759-05-7

In Stock97%+

3,4-Dimethoxyaniline HCl Genotoxic Impurity Qualified Reference Standard structure

3,4-Dimethoxyaniline HCl Genotoxic Impurity Qualified Reference Standard

CAS: 35589-32-3

In Stock97%+

3,4-Dimethyl-5-pentyl-2-furannonanoic Acid structure

3,4-Dimethyl-5-pentyl-2-furannonanoic Acid

CAS: 57818-40-3

In Stock>90%

Riboflavin Impurity N66 structure

Riboflavin Impurity N66

CAS: 21037-26-3

In Stock97%+

Lusutrombopag Impurity N2 structure

Lusutrombopag Impurity N2

CAS: 89894-53-1

In Stock97%+

Selegiline EP Impurity C structure

Selegiline EP Impurity C

CAS: 73917-84-7

In Stock97%+

Rebamipide impurity 04 structure

Rebamipide impurity 04

CAS: 23974-11-0

In Stock>90%

Butylphthalide Impurity N7 structure

Butylphthalide Impurity N7

CAS: 76681-73-7

In Stock97%+

Fenofibrate Impurity N113 structure

Fenofibrate Impurity N113

CAS: 60012-96-6

In Stock97%+

Fluorescein impurity 01 structure

Fluorescein impurity 01

CAS: 76579-17-4

In Stock97%+

Trametinib impurity 03 structure

Trametinib impurity 03

CAS: 871700-24-2

In Stock97%+

Trametinib impurity 02 structure

Trametinib impurity 02

CAS: 871700-32-2

In Stock97%+

Saxagliptin Impurity N34 HCl structure

Saxagliptin Impurity N34 HCl

CAS: 361441-98-7(free base)

In Stock97%+

Ponatinib Impurity N72 structure

Ponatinib Impurity N72

CAS: 957147-18-1

In Stock97%+

Atorvastatin Impurity N2 structure

Atorvastatin Impurity N2

CAS: 40281-50-3

In Stock97%+

Lifitegrast Impurity N4 structure

Lifitegrast Impurity N4

CAS: 58123-77-6

In Stock97%+

Sildenafil Impurity N1 structure

Sildenafil Impurity N1

CAS: 911715-34-9

In Stock97%+

3-Methyl-1-(5-oxohexyl)-3,9-dihydro-1H-purine-2,6-dione (Pentoxifylline impurity) structure

3-Methyl-1-(5-oxohexyl)-3,9-dihydro-1H-purine-2,6-dione (Pentoxifylline impurity)

CAS: 38975-46-1

In Stock97%+

Teneligliptin impurity N1 structure

Teneligliptin impurity N1

CAS: 942-32-5

In Stock97%+

3-Methyl-7-(5-oxohexyl)-3,7-dihydro-1H-purine-2,6-dione (Pentoxifylline impurity) structure

3-Methyl-7-(5-oxohexyl)-3,7-dihydro-1H-purine-2,6-dione (Pentoxifylline impurity)

CAS: 55242-67-6

In Stock97%+

3-Methylene Simvastatin Impurity structure

3-Methylene Simvastatin Impurity

CAS: 79902-62-8

In Stock97%+

Delgocitinib impurity N1 structure

Delgocitinib impurity N1

CAS: 2064338-19-6

In Stock97%+

4-(2,2-Dimethyl-6-methylenecyclohexyl)-3-buten-2-one structure

4-(2,2-Dimethyl-6-methylenecyclohexyl)-3-buten-2-one

CAS: 79-76-5

In Stock97%+

Olaparib Impurity N1 structure

Olaparib Impurity N1

CAS: 763111-46-2

In Stock97%+

Regorafenib EP Impurity B structure

Regorafenib EP Impurity B

CAS: 2141961-84-2

In Stock97%+

Fluralaner Impurity N4 structure

Fluralaner Impurity N4

CAS: 864730-61-0

In Stock97%+

Cinitapride Impurity N30 structure

Cinitapride Impurity N30

CAS: 86718-16-3

In Stock97%+

Avanafil Impurity N1 structure

Avanafil Impurity N1

CAS: 859517-85-4

In Stock97%+

Levofloxacin impurity 02 structure

Levofloxacin impurity 02

CAS: 3403-82-5

In Stock97%+

Bupivacaine Impurity N1 structure

Bupivacaine Impurity N1

CAS: 51989-47-0

In Stock97%+

Selumetinib Impurity N1 structure

Selumetinib Impurity N1

CAS: 917980-11-1

In Stock97%+

Baclofen EP Impurity F structure

Baclofen EP Impurity F

CAS: 4846-95-1

In Stock97%+

Dapsone EP Impurity E structure

Dapsone EP Impurity E

CAS: 7146-68-1

In Stock97%+

Paracetamol EP Impurity K HCl structure

Paracetamol EP Impurity K HCl

CAS: 51-78-5

In Stock97%+

Testosterone Impurity N2 structure

Testosterone Impurity N2

CAS: 3066-12-4

In Stock97%+

4-Chloro-2-(chlorosulfonyl)benzoic acid (Bumetanide Impurity) structure

4-Chloro-2-(chlorosulfonyl)benzoic acid (Bumetanide Impurity)

CAS: 923137-49-9

In Stock97%+

4-Chloro-3-sulfobenzoic acid (Bumetanide Impurity) structure

4-Chloro-3-sulfobenzoic acid (Bumetanide Impurity)

CAS: 755698-62-5

In Stock>95%

4-Fluoro-2-((6-methoxy-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile (Trelagliptin Impurity) structure

4-Fluoro-2-((6-methoxy-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile (Trelagliptin Impurity)

CAS: 2088203-83-0

In Stock97%+

Ilaprazole Impurity N4 structure

Ilaprazole Impurity N4

CAS: 88218-10-4

In Stock97%+

Dapsone EP Impurity B structure

Dapsone EP Impurity B

CAS: 7019-01-4

In Stock>95%

Probucol Impurity N10 structure

Probucol Impurity N10

CAS: 3774-52-5

In Stock97%+

Brivudine Impurity N1 structure

Brivudine Impurity N1

CAS: 61135-36-2

In Stock97%+

Flupentixol Impurity N96 structure

Flupentixol Impurity N96

CAS: 2244985-34-8

In Stock97%+

Lifitegrast Impurity N68 structure

Lifitegrast Impurity N68

CAS: 89315-56-0

In Stock97%+

Testosterone Impurity N13 structure

Testosterone Impurity N13

CAS: 6165-21-5

In Stock97%+

Tipiracil Impurity N1 structure

Tipiracil Impurity N1

CAS: 733037-98-4

In Stock97%+

Etoricoxib impurity 01 structure

Etoricoxib impurity 01

CAS: 646459-49-6

In Stock97%+

Metoclopramide impurity 01 structure

Metoclopramide impurity 01

CAS: 82689-92-7

In Stock97%+

Carglumic Acid impurity 01 structure

Carglumic Acid impurity 01

CAS: 5624-26-0

In Stock97%+

Esomeprazole impurity 03 structure

Esomeprazole impurity 03

CAS: 91168-31-9

In Stock97%+

Edaravone impurity 1 structure

Edaravone impurity 1

CAS: 49597-17-3

In Stock97%+

Prostaglandin Impurity N1 structure

Prostaglandin Impurity N1

CAS: 36150-02-4

In Stock97%+

Cholic Acid Impurity N2 structure

Cholic Acid Impurity N2

CAS: 2958-05-6

In Stock97%+

Tipiracil Impurity N2 structure

Tipiracil Impurity N2

CAS: 2069937-25-1

In Stock97%+

6,11-Dihydrodibenzo[b,e]oxepin-11-ol (Doxepin Impurity) structure

6,11-Dihydrodibenzo[b,e]oxepin-11-ol (Doxepin Impurity)

CAS: 5251-26-3

In Stock97%+

6,7-Dichloro-3,5-dihydro-1-hydroxyimidazo[1,2-α]quinazolin-2(1H)-one(Anagrelide Impurity) structure

6,7-Dichloro-3,5-dihydro-1-hydroxyimidazo[1,2-α]quinazolin-2(1H)-one(Anagrelide Impurity)

CAS: 875467-41-7

In Stock97%+

6alpha-Methoxymethyl Exemestane Impurity structure

6alpha-Methoxymethyl Exemestane Impurity

CAS: 881896-95-3

In Stock97%+

Abemaciclib Impurity N1 structure

Abemaciclib Impurity N1

CAS: 2177297-46-8

In Stock97%+

Oxazepam impurity 02 structure

Oxazepam impurity 02

CAS: 4015-28-5

In Stock97%+

6-Chloro-5-isopropylpyrimidine-2,4-diol (Impurity) structure

6-Chloro-5-isopropylpyrimidine-2,4-diol (Impurity)

CAS: 96796-80-4

In Stock97%+

Progesterone Impurity N38 structure

Progesterone Impurity N38

CAS: 70081-51-5

In Stock97%+

Chlormadinone Acetate EP Impurity K structure

Chlormadinone Acetate EP Impurity K

CAS: 425-51-4

In Stock97%+

Primaquine EP Impurity B structure

Primaquine EP Impurity B

CAS: 85-81-4

In Stock97%+

Telmisartan Impurity N1 structure

Telmisartan Impurity N1

CAS: 69825-83-8

In Stock97%+

Testosterone Impurity N16 structure

Testosterone Impurity N16

CAS: 24704-84-5

In Stock97%+

Brexpiprazole Impurity N19 structure

Brexpiprazole Impurity N19

CAS: 2059942-14-0

In Stock97%+

Trazodone impurity 54 structure

Trazodone impurity 54

CAS: 55290-67-0

In Stock97%+

7-Hydroxy Quetiapine EP Impurity B structure

7-Hydroxy Quetiapine EP Impurity B

CAS: 232597-73-8

In Stock97%+

Methotrexate impurity N1 structure

Methotrexate impurity N1

CAS: 4215-07-0

In Stock97%+

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