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Pharmaceutical Impurity Reference Standards

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

Tamsulosin EP Impurity H structure

Tamsulosin EP Impurity H

CAS: 1329611-47-3

In Stock97%+

Acebutolol Hydrochloride - Impurity H (Freebase) structure

Acebutolol Hydrochloride - Impurity H (Freebase)

CAS: 1329613-31-1

In Stock97%+

Citalopram EP Impurity G structure

Citalopram EP Impurity G

CAS: 1329745-98-3

In Stock97%+

Dextromethorphan Impurity 6 structure

Dextromethorphan Impurity 6

CAS: 1329834-01-6

In Stock97%+

Metoclopramide Impurity 2 structure

Metoclopramide Impurity 2

CAS: 133-10-8

In Stock97%+

Hydrochlorothiazide Impurity 1 structure

Hydrochlorothiazide Impurity 1

CAS: 133-74-4

In Stock97%+

Thioridazine EP Impurity C-d3 structure

Thioridazine EP Impurity C-d3

CAS: 1330076-56-6

In Stock97%+

Acebutolol EP Impurity G structure

Acebutolol EP Impurity G

CAS: 1330165-98-4

In Stock97%+

Almotriptan Dimer Impurity structure

Almotriptan Dimer Impurity

CAS: 1330166-13-6

In Stock97%+

D 517-d7 Hydrochloride (Verapamil Impurity) structure

D 517-d7 Hydrochloride (Verapamil Impurity)

CAS: 1330173-18-6

In Stock97%+

Rabeprazole EP Impurity A-D3 structure

Rabeprazole EP Impurity A-D3

CAS: 1330261-33-0

In Stock97%+

Darifenacin Impurity 2 structure

Darifenacin Impurity 2

CAS: 133099-10-2

In Stock97%+

Flutamide EP Impurity C structure

Flutamide EP Impurity C

CAS: 13312-12-4

In Stock97%+

Mitotan Impurity 1 structure

Mitotan Impurity 1

CAS: 13312-58-8

In Stock97%+

Clopidogrel Impurity 35 structure

Clopidogrel Impurity 35

CAS: 1331383-19-7

In Stock97%+

Clopidogrel Impurity 34 structure

Clopidogrel Impurity 34

CAS: 1331383-23-3

In Stock97%+

Misoprostol EP Impurity D (Mixture of E/Z-Isomers) structure

Misoprostol EP Impurity D (Mixture of E/Z-Isomers)

CAS: 1331639-92-9

In Stock97%+

Ribociclib Impurity 14 structure

Ribociclib Impurity 14

CAS: 1331847-17-6

In Stock97%+

Crisaborole Impurity 40 structure

Crisaborole Impurity 40

CAS: 13321-75-0

In Stock97%+

Crisaborole Impurity 39 structure

Crisaborole Impurity 39

CAS: 13321-76-1

In Stock97%+

Pibrentasvir Impurity 3 structure

Pibrentasvir Impurity 3

CAS: 1332356-31-6

In Stock97%+

Remifentanil Impurity 7 structure

Remifentanil Impurity 7

CAS: 1332691-33-4

In Stock97%+

Atazanavir EP Impurity F structure

Atazanavir EP Impurity F

CAS: 1332981-14-2

In Stock97%+

Atazanavir EP Impurity G structure

Atazanavir EP Impurity G

CAS: 1332981-16-4

In Stock97%+

Benzocaine EP Impurity D structure

Benzocaine EP Impurity D

CAS: 1333-08-0

In Stock97%+

Fesoterodine Impurity N95 structure

Fesoterodine Impurity N95

CAS: 1333234-73-3

In Stock97%+

Loratadine Impurity 7 structure

Loratadine Impurity 7

CAS: 133330-61-7

In Stock97%+

Regorafenib Impurity N2 structure

Regorafenib Impurity N2

CAS: 1333390-56-9

In Stock97%+

Dorzolamide Impurity 42 structure

Dorzolamide Impurity 42

CAS: 133359-79-2

In Stock97%+

Sitagliptin Impurity 75 structure

Sitagliptin Impurity 75

CAS: 1334244-24-4

In Stock97%+

Clofarabine Impurity 2 structure

Clofarabine Impurity 2

CAS: 1334337-31-3

In Stock97%+

Lenalidomide Impurity 16 structure

Lenalidomide Impurity 16

CAS: 133446-99-8

In Stock97%+

Propylthiouracil Impurity 1 structure

Propylthiouracil Impurity 1

CAS: 13345-08-9

In Stock97%+

Relugolix Impurity 32 structure

Relugolix Impurity 32

CAS: 1334511-36-2

In Stock97%+

Sofosbuvir Impurity 101 structure

Sofosbuvir Impurity 101

CAS: 1334513-10-8

In Stock97%+

Iloperidone Impurity N1 structure

Iloperidone Impurity N1

CAS: 133454-47-4

In Stock97%+

Iloperidone Impurity 4 structure

Iloperidone Impurity 4

CAS: 133455-04-6

In Stock97%+

Gabapentin EP Impurity B Potassium Salt structure

Gabapentin EP Impurity B Potassium Salt

CAS: 133481-12-6

In Stock97%+

Niraparib Impurity N2 structure

Niraparib Impurity N2

CAS: 1334823-70-9

In Stock97%+

Eprosartan Impurity 1 structure

Eprosartan Impurity 1

CAS: 133486-13-2

In Stock97%+

Moxifloxacin Impurity 70 structure

Moxifloxacin Impurity 70

CAS: 133492-64-5

In Stock97%+

Gentian Violet Impurity 3 structure

Gentian Violet Impurity 3

CAS: 133502-50-8

In Stock97%+

Dolutegravir Impurity N1 structure

Dolutegravir Impurity N1

CAS: 1335210-34-8

In Stock97%+

Tenofovir Impurity 113 structure

Tenofovir Impurity 113

CAS: 1335287-28-9

In Stock97%+

Cefixime Impurity C16 structure

Cefixime Impurity C16

CAS: 1335475-08-5

In Stock97%+

Pimavanserin Acid Impurity structure

Pimavanserin Acid Impurity

CAS: 13362-94-2

In Stock97%+

Nevirapine EP Impurity A structure

Nevirapine EP Impurity A

CAS: 133627-17-5

In Stock97%+

Nevirapine Impurity 1 structure

Nevirapine Impurity 1

CAS: 133627-47-1

In Stock97%+

Regadenoson Impurity 38 structure

Regadenoson Impurity 38

CAS: 13364-95-9

In Stock97%+

Diclazuril EP Impurity F structure

Diclazuril EP Impurity F

CAS: 133648-80-3

In Stock97%+

Pyrroloquinoline Impurity 2 structure

Pyrroloquinoline Impurity 2

CAS: 133706-80-6

In Stock97%+

Troxerutin Impurity 7 structure

Troxerutin Impurity 7

CAS: 13374-50-0

In Stock97%+

Silodosin impurity N1 structure

Silodosin impurity N1

CAS: 1338365-54-0

In Stock97%+

Chloroquine Impurity 1 structure

Chloroquine Impurity 1

CAS: 133860-75-0

In Stock97%+

Ropivacaine Impurity 9 structure

Ropivacaine Impurity 9

CAS: 13388-86-8

In Stock97%+

Zotepine Impurity9 structure

Zotepine Impurity9

CAS: 133884-20-5

In Stock97%+

Cetirizine Impurity C18 structure

Cetirizine Impurity C18

CAS: 13391-39-4

In Stock97%+

Losartan Impurity N3 structure

Losartan Impurity N3

CAS: 133910-00-6

In Stock97%+

Darifenacin Pyrrolidine Impurity (S)-Isomer structure

Darifenacin Pyrrolidine Impurity (S)-Isomer

CAS: 134002-26-9

In Stock97%+

Leuprorelin Impurity 21 structure

Leuprorelin Impurity 21

CAS: 134053-51-3

In Stock97%+

4-((1-Amino-1-oxobutan-2-yl)amino)butanamide (Levetiracetam Impurity) structure

4-((1-Amino-1-oxobutan-2-yl)amino)butanamide (Levetiracetam Impurity)

CAS: 1341459-52-6

In Stock97%+

2-((4-Ethoxy-4-oxobutyl)amino)butanoic acid (Levetiracetam Impurity) structure

2-((4-Ethoxy-4-oxobutyl)amino)butanoic acid (Levetiracetam Impurity)

CAS: 1342229-32-6

In Stock97%+

4-((1-Amino-1-oxobutan-2-yl)amino)butanoic acid (Levetiracetam Impurity) structure

4-((1-Amino-1-oxobutan-2-yl)amino)butanoic acid (Levetiracetam Impurity)

CAS: 1342566-28-2

In Stock97%+

Terbinafine Impurity 1 structure

Terbinafine Impurity 1

CAS: 134274-69-4

In Stock97%+

Atorvastatin Impurity 65 structure

Atorvastatin Impurity 65

CAS: 134394-98-2

In Stock97%+

Nilotinib Impurity A structure

Nilotinib Impurity A

CAS: 1345336-53-9

In Stock97%+

Cabozantinib 4-Fluorocarbamoyl Methyl Ester Impurity structure

Cabozantinib 4-Fluorocarbamoyl Methyl Ester Impurity

CAS: 1345847-71-3

In Stock97%+

Linezolid Impurity 35 structure

Linezolid Impurity 35

CAS: 1345879-87-9

In Stock97%+

Hydroxyethyl Salicylate EP Impurity C structure

Hydroxyethyl Salicylate EP Impurity C

CAS: 13461-41-1

In Stock97%+

Dehydro Ivabradine Oxalate (Ivabradine IVA-3 Impurity Oxalate) structure

Dehydro Ivabradine Oxalate (Ivabradine IVA-3 Impurity Oxalate)

CAS: 1346558-08-4

In Stock97%+

Nebivolol Impurity 1 structure

Nebivolol Impurity 1

CAS: 1346562-34-2

In Stock97%+

Dimetindene EP Impurity H structure

Dimetindene EP Impurity H

CAS: 1346597-95-2

In Stock97%+

Clopidogrel Impurity 6 structure

Clopidogrel Impurity 6

CAS: 1346598-12-6

In Stock97%+

Lansoprazole Impurity H structure

Lansoprazole Impurity H

CAS: 1346598-28-4

In Stock>95%

2-Desisopropyl-2-phenyl Repaglinide-d5 (Repaglinide Impurity) structure

2-Desisopropyl-2-phenyl Repaglinide-d5 (Repaglinide Impurity)

CAS: 1346598-75-1

In Stock97%+

O-Desmethyl Venlafaxine Cyclic Impurity-d5 structure

O-Desmethyl Venlafaxine Cyclic Impurity-d5

CAS: 1346598-83-1

In Stock97%+

Zolmitriptan Impurity N1 structure

Zolmitriptan Impurity N1

CAS: 1346599-24-3

In Stock97%+

Omeprazole Impurity N1 structure

Omeprazole Impurity N1

CAS: 1346600-29-0

In Stock97%+

Loratadine Impurity 30 structure

Loratadine Impurity 30

CAS: 1346600-30-3

In Stock97%+

Omeprazole Impurity 101 structure

Omeprazole Impurity 101

CAS: 1346600-70-1

In Stock97%+

Venlafaxine Impurity 5 structure

Venlafaxine Impurity 5

CAS: 1346600-77-8

In Stock97%+

Sumatriptan EP Impurity B-d3 structure

Sumatriptan EP Impurity B-d3

CAS: 1346600-79-0

In Stock97%+

Sildenafil Pyrimidine Impurity structure

Sildenafil Pyrimidine Impurity

CAS: 1346600-82-5

In Stock97%+

[1-Hydroxy-3-(methyl-2,2-dimethylbutylamino)propylidene] Bisphosphonic Acid(Ibandronic Acid Impurity) structure

[1-Hydroxy-3-(methyl-2,2-dimethylbutylamino)propylidene] Bisphosphonic Acid(Ibandronic Acid Impurity)

CAS: 1346601-15-7

In Stock97%+

Venlafaxine Impurity 13 structure

Venlafaxine Impurity 13

CAS: 1346601-21-5

In Stock97%+

Zolmitriptan Sulfonamide Impurity structure

Zolmitriptan Sulfonamide Impurity

CAS: 1346602-02-5

In Stock97%+

Propafenone Dimer Impurity-d10 structure

Propafenone Dimer Impurity-d10

CAS: 1346602-27-4

In Stock97%+

Finasteride Impurity 11 structure

Finasteride Impurity 11

CAS: 1346602-40-1

In Stock97%+

Baclofen Impurity 10 structure

Baclofen Impurity 10

CAS: 1346603-21-1

In Stock97%+

Debrisoquine 8-O-Benzyl Impurity structure

Debrisoquine 8-O-Benzyl Impurity

CAS: 1346604-07-6

In Stock97%+

Amiodarone Impurity 19 structure

Amiodarone Impurity 19

CAS: 1346604-30-5

In Stock97%+

3-Amino-4-(2-chlorophenyl)-6-nitro-2(1H)-quinolinone-d4 (Clonazepam Impurity) structure

3-Amino-4-(2-chlorophenyl)-6-nitro-2(1H)-quinolinone-d4 (Clonazepam Impurity)

CAS: 1346604-43-0

In Stock97%+

Di-destriazole Desmethyl Anastrozole Dimer Impurity structure

Di-destriazole Desmethyl Anastrozole Dimer Impurity

CAS: 1346604-73-6

In Stock97%+

Flurbiprofen Impurity 22 structure

Flurbiprofen Impurity 22

CAS: 1346604-78-1

In Stock97%+

2-Hydroxy-5-methyl-γ-phenylbenzenepropanol-d5(Tolterodine Impurity) structure

2-Hydroxy-5-methyl-γ-phenylbenzenepropanol-d5(Tolterodine Impurity)

CAS: 1346605-35-3

In Stock97%+

Alprazolam Impurity 7 structure

Alprazolam Impurity 7

CAS: 1346606-48-1

In Stock97%+

(R)-1-[3-(Methylamino)-1-(2-thienyl)propyl]-2-naphthalenol(Duloxetine Impurity) structure

(R)-1-[3-(Methylamino)-1-(2-thienyl)propyl]-2-naphthalenol(Duloxetine Impurity)

CAS: 1346616-98-5

In Stock97%+

(S)-1-[3-(Methylamino)-1-(2-thienyl)propyl]-2-naphthalenol(Duloxetine Impurity) structure

(S)-1-[3-(Methylamino)-1-(2-thienyl)propyl]-2-naphthalenol(Duloxetine Impurity)

CAS: 1346617-32-0

In Stock97%+

Naratriptan Impurity N3 structure

Naratriptan Impurity N3

CAS: 1346746-73-3

In Stock97%+

Erlotinib Impurity 24 structure

Erlotinib Impurity 24

CAS: 134690-40-7

In Stock97%+

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