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Pharmaceutical Impurity Reference Standards

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

Tapentadol EP Impurity E structure

Tapentadol EP Impurity E

CAS: 175591-22-7

In Stock97%+

Posaconazole Impurity 21 structure

Posaconazole Impurity 21

CAS: 175712-02-4

In Stock97%+

Ribavirin Impurity 30-d6 structure

Ribavirin Impurity 30-d6

CAS: 175733-29-6

In Stock97%+

Dabigatran Etexilate Impurity 84 structure

Dabigatran Etexilate Impurity 84

CAS: 175867-55-7

In Stock97%+

Tartrazine Impurity 2 Monomer structure

Tartrazine Impurity 2 Monomer

CAS: 17596-06-4

In Stock97%+

Ephedrine Impurity N1 structure

Ephedrine Impurity N1

CAS: 17608-59-2

In Stock97%+

Maribavir Impurity N26 structure

Maribavir Impurity N26

CAS: 176161-18-5

In Stock97%+

Levothyroxine Impurity 58 structure

Levothyroxine Impurity 58

CAS: 176258-87-0

In Stock97%+

Orphenadrine EP Impurity E HCl (Orphenadrine USP Related Compound E HCl) structure

Orphenadrine EP Impurity E HCl (Orphenadrine USP Related Compound E HCl)

CAS: 17630-53-4

In Stock97%+

Cisplatin - Impurity B (FREE BASE) structure

Cisplatin - Impurity B (FREE BASE)

CAS: 17632-41-6

In Stock97%+

Budesonide 17,21-Diacetyloxy Impurity structure

Budesonide 17,21-Diacetyloxy Impurity

CAS: 17652-24-3

In Stock97%+

Policresulen Impurity 6 structure

Policresulen Impurity 6

CAS: 17688-83-4

In Stock97%+

Naproxen Impurity 5 structure

Naproxen Impurity 5

CAS: 17696-64-9

In Stock97%+

Ambrisentan Hydroxyester Impurity structure

Ambrisentan Hydroxyester Impurity

CAS: 177036-78-1

In Stock97%+

Rivaroxaban Impurity N8 structure

Rivaroxaban Impurity N8

CAS: 1770812-38-8

In Stock97%+

Calcium Dobesilate Impurity N3 structure

Calcium Dobesilate Impurity N3

CAS: 17724-11-7

In Stock97%+

Montelukast Impurity 4 structure

Montelukast Impurity 4

CAS: 1772578-77-4

In Stock97%+

Rizatriptan Impurity 6 structure

Rizatriptan Impurity 6

CAS: 177270-91-6

In Stock97%+

Dapoxetine Impurity 78 structure

Dapoxetine Impurity 78

CAS: 17733-68-5

In Stock97%+

Dapsone Impurity 7 structure

Dapsone Impurity 7

CAS: 1774-38-5

In Stock97%+

Thiacetazone Dimer Impurity structure

Thiacetazone Dimer Impurity

CAS: 17745-84-5

In Stock97%+

Palbociclib Impurity 72 structure

Palbociclib Impurity 72

CAS: 1774898-55-3

In Stock97%+

Nitrazepam Impurity 2 structure

Nitrazepam Impurity 2

CAS: 1775-95-7

In Stock97%+

Nicotinamide 1-Methyl 1,4-Dihydro Impurity structure

Nicotinamide 1-Methyl 1,4-Dihydro Impurity

CAS: 17750-23-1

In Stock97%+

Spiramycin EP Impurity E structure

Spiramycin EP Impurity E

CAS: 177584-14-4

In Stock＞90%

Codeinone Impurity 3 structure

Codeinone Impurity 3

CAS: 1777-89-5

In Stock97%+

Estriol Impurity N2 structure

Estriol Impurity N2

CAS: 177714-21-5

In Stock97%+

Mirabegron Impurity 58 structure

Mirabegron Impurity 58

CAS: 17790-81-7

In Stock97%+

Indoxacarb Impurity 3 structure

Indoxacarb Impurity 3

CAS: 177905-10-1

In Stock>95%

Mesalazine EP Impurity J HCl structure

Mesalazine EP Impurity J HCl

CAS: 177960-41-7

In Stock97%+

Sarizotan Impurity 2 structure

Sarizotan Impurity 2

CAS: 177976-33-9

In Stock97%+

Sarizotan Impurity 9 structure

Sarizotan Impurity 9

CAS: 177976-39-5

In Stock97%+

Ziprasidone impurity 53 structure

Ziprasidone impurity 53

CAS: 177985-31-8

In Stock97%+

Tofacitinib Impurity N1 structure

Tofacitinib Impurity N1

CAS: 1782226-06-5

In Stock97%+

Tetrazepam EP impurity C structure

Tetrazepam EP impurity C

CAS: 1784-78-7

In Stock97%+

Cefdinir Impurity C84 structure

Cefdinir Impurity C84

CAS: 178422-45-2

In Stock97%+

Chlorambucil EP Impurity G structure

Chlorambucil EP Impurity G

CAS: 178481-89-5

In Stock97%+

Calcitonin Salmon Impurity 24 structure

Calcitonin Salmon Impurity 24

CAS: 17854-07-8

In Stock97%+

Chlorothalonil Impurity 6 structure

Chlorothalonil Impurity 6

CAS: 1786-86-3

In Stock97%+

Misoprostol EP Impurity A (mixture of isomers) structure

Misoprostol EP Impurity A (mixture of isomers)

CAS: 1788085-78-8

In Stock97%+

Tetrazepam - Impurity B structure

Tetrazepam - Impurity B

CAS: 1789-33-9

In Stock97%+

Levofloxacin Impurity 1 structure

Levofloxacin Impurity 1

CAS: 178912-61-3

In Stock97%+

Levocabastine Impurity 9 structure

Levocabastine Impurity 9

CAS: 179064-61-0

In Stock97%+

Ceftazidime Impurity C68 structure

Ceftazidime Impurity C68

CAS: 179258-52-7

In Stock≥90%

Bortezomib Impurity 80 structure

Bortezomib Impurity 80

CAS: 179324-86-8

In Stock97%+

2-Ethoxy-1-[[2'-[2-(trityl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-4-carboxylic Acid Methyl Ester-d4 (Candesartan Impurity) structure

2-Ethoxy-1-[[2'-[2-(trityl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-4-carboxylic Acid Methyl Ester-d4 (Candesartan Impurity)

CAS: 1793997-59-7

In Stock97%+

Minocycline EP Impurity A (HCl salt) structure

Minocycline EP Impurity A (HCl salt)

CAS: 179471-96-6

In Stock97%+

Ambroxol Cyclic Impurity-d5 Dihydrochloride structure

Ambroxol Cyclic Impurity-d5 Dihydrochloride

CAS: 1794752-24-1

In Stock97%+

Norepinephrine Impurity 13-d5 structure

Norepinephrine Impurity 13-d5

CAS: 1794783-36-0

In Stock97%+

Atorvastatin Impurity 17 structure

Atorvastatin Impurity 17

CAS: 1795791-15-9

In Stock97%+

Gefitinib Impurity 4 structure

Gefitinib Impurity 4

CAS: 179688-52-9

In Stock97%+

Nevirapine 9-Chloro Impurity structure

Nevirapine 9-Chloro Impurity

CAS: 1796928-56-7

In Stock97%+

Diclazuril EP Impurity I structure

Diclazuril EP Impurity I

CAS: 1796928-69-2

In Stock97%+

Simvastatin Impurity M structure

Simvastatin Impurity M

CAS: 1796930-96-5

In Stock97%+

2-Ethoxy-1-[[2’-[2-(trityl)-2H-tetrazol-5-yl][1,1’-biphenyl]-4-yl]methyl]-1H-benzimidazole-4-carboxylic Acid Methyl Ester (Candesartan Impurity) structure

2-Ethoxy-1-[[2’-[2-(trityl)-2H-tetrazol-5-yl][1,1’-biphenyl]-4-yl]methyl]-1H-benzimidazole-4-carboxylic Acid Methyl Ester (Candesartan Impurity)

CAS: 1796932-77-8

In Stock97%+

Haloperidol Decanoate EP Impurity E structure

Haloperidol Decanoate EP Impurity E

CAS: 1796933-22-6

In Stock97%+

Palonosetron Impurity N15 structure

Palonosetron Impurity N15

CAS: 1796933-62-4

In Stock97%+

Bendamustine Isopropyl Ester Impurity structure

Bendamustine Isopropyl Ester Impurity

CAS: 1797008-41-3

In Stock97%+

Haloperidol Decanoate EP Impurity D structure

Haloperidol Decanoate EP Impurity D

CAS: 1797008-46-8

In Stock97%+

Olanzapine Impurity 16 structure

Olanzapine Impurity 16

CAS: 1797009-17-6

In Stock97%+

Norfloxacin EP Impurity B HCl structure

Norfloxacin EP Impurity B HCl

CAS: 1797116-86-9

In Stock97%+

Risperidone Impurity N1 structure

Risperidone Impurity N1

CAS: 1797131-18-0

In Stock97%+

Haloperidol Decanoate EP Impurity F structure

Haloperidol Decanoate EP Impurity F

CAS: 1797131-50-0

In Stock97%+

Ropinirole Impurity N55 structure

Ropinirole Impurity N55

CAS: 1797132-03-6

In Stock97%+

Pantoprazole Impurity 25 structure

Pantoprazole Impurity 25

CAS: 1797132-60-5

In Stock97%+

Losartan Impurity N1 structure

Losartan Impurity N1

CAS: 1797134-81-6

In Stock97%+

Oxazepam Impurity 2 structure

Oxazepam Impurity 2

CAS: 17977-76-3

In Stock97%+

Haloperidol Decanoate EP Impurity A structure

Haloperidol Decanoate EP Impurity A

CAS: 1797824-64-6

In Stock97%+

2-[[1-Methyl-2-[2-(trifluoromethyl)phenyl]ethyl]amino]ethanol 1-Benzoate Hydrochloride (Benfluorex Impurity) structure

2-[[1-Methyl-2-[2-(trifluoromethyl)phenyl]ethyl]amino]ethanol 1-Benzoate Hydrochloride (Benfluorex Impurity)

CAS: 1797843-85-6

In Stock97%+

Ziprasidone Impurity 4 structure

Ziprasidone Impurity 4

CAS: 1797879-13-0

In Stock97%+

Sumatriptan EP Impurity C structure

Sumatriptan EP Impurity C

CAS: 1797905-62-4

In Stock97%+

Rosiglitazone Impurity 2 structure

Rosiglitazone Impurity 2

CAS: 1797979-55-5

In Stock97%+

Darifenacin Impurity N1 structure

Darifenacin Impurity N1

CAS: 1797983-04-0

In Stock97%+

Candesartan Cilexetil Impurity 15 structure

Candesartan Cilexetil Impurity 15

CAS: 1797985-81-9

In Stock97%+

2,3-Bis(1,5-dihydro-5-methyl-5-(1-methylethyl-4H-Imadazol-4-one)-5-methoxymethyl Pyridine (Imazamox Impurity) structure

2,3-Bis(1,5-dihydro-5-methyl-5-(1-methylethyl-4H-Imadazol-4-one)-5-methoxymethyl Pyridine (Imazamox Impurity)

CAS: 1797987-25-7

In Stock97%+

Candesartan Cilexetil Impurity 17 structure

Candesartan Cilexetil Impurity 17

CAS: 1798004-41-7

In Stock97%+

Diclazuril Impurity G structure

Diclazuril Impurity G

CAS: 1798004-50-8

In Stock97%+

Nevirapine Impurity 28 structure

Nevirapine Impurity 28

CAS: 1798004-92-8

In Stock97%+

Cefazolin Impurity 20 structure

Cefazolin Impurity 20

CAS: 1798390-47-2

In Stock97%+

Toremifene Impurity 3 structure

Toremifene Impurity 3

CAS: 1798421-30-3

In Stock97%+

Deracoxib Impurity 4 structure

Deracoxib Impurity 4

CAS: 1798429-38-5

In Stock97%+

Bromfenac Impurity N2 structure

Bromfenac Impurity N2

CAS: 1798431-98-7

In Stock97%+

Solifenacin Impurity 4 structure

Solifenacin Impurity 4

CAS: 1798817-92-1

In Stock97%+

Iopamidol Impurity (Desdiiodo Iopamidol) structure

Iopamidol Impurity (Desdiiodo Iopamidol)

CAS: 1798830-49-5

In Stock97%+

Levofloxacin Impurity 12 structure

Levofloxacin Impurity 12

CAS: 1798887-79-2

In Stock97%+

Levofloxacin Impurity 11 structure

Levofloxacin Impurity 11

CAS: 1798902-76-7

In Stock97%+

AB-PINACA Impurity 7（5-Chloro AB-PINACA） structure

AB-PINACA Impurity 7（5-Chloro AB-PINACA）

CAS: 1801552-02-2

In Stock97%+

Cyclobenzaprine USP Related Compound A structure

Cyclobenzaprine USP Related Compound A

CAS: 18029-54-4

In Stock97%+

Linagliptin impurity N1 structure

Linagliptin impurity N1

CAS: 1803079-48-2

In Stock97%+

Esomeprazole Impurity 12 structure

Esomeprazole Impurity 12

CAS: 1803449-02-6

In Stock97%+

Tadalafil Impurity N8 structure

Tadalafil Impurity N8

CAS: 1803592-02-0

In Stock97%+

Dofetilide Impurity 10 structure

Dofetilide Impurity 10

CAS: 1803592-87-1

In Stock97%+

Pyrazine Impurity 5 structure

Pyrazine Impurity 5

CAS: 1803596-66-8

In Stock97%+

Entecavir Impurity 45 structure

Entecavir Impurity 45

CAS: 1803833-41-1

In Stock97%+

Solifenacin Impurity 13 structure

Solifenacin Impurity 13

CAS: 180468-41-1

In Stock97%+

Tryptophan Impurity 15 structure

Tryptophan Impurity 15

CAS: 180509-18-6

In Stock97%+

Albendazole Impurity 15 structure

Albendazole Impurity 15

CAS: 1805694-08-9

In Stock97%+

Eletriptan Impurity 13 structure

Eletriptan Impurity 13

CAS: 180637-89-2

In Stock97%+

Atorvastatin EP Impurity C Sodium Salt structure

Atorvastatin EP Impurity C Sodium Salt

CAS: 1807481-00-0

In Stock97%+

Fosfluconazole Impurity 4 structure

Fosfluconazole Impurity 4

CAS: 1807913-50-3

In Stock97%+

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