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Pharmaceutical Impurity Reference Standards

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

59,706 products available — showing first 8,000

Sodium Cromoglicate Impurity C51 structure

Sodium Cromoglicate Impurity C51

CAS: 16130-17-9

In Stock97%+

Valproic Acid Impurity 48 structure

Valproic Acid Impurity 48

CAS: 16136-85-9

In Stock97%+

Ribavirin Impurity 56 HCl structure

Ribavirin Impurity 56 HCl

CAS: 16139-18-7

In Stock97%+

Molsidomine Impurity 1 structure

Molsidomine Impurity 1

CAS: 16142-26-0

In Stock97%+

Articaine impurity 01 structure

Articaine impurity 01

CAS: 161448-93-7

In Stock97%+

Pimozide Impurity 1 structure

Pimozide Impurity 1

CAS: 16148-06-4

In Stock97%+

Rivaroxaban Impurity N5 HCl structure

Rivaroxaban Impurity N5 HCl

CAS: 1616077-53-2

In Stock97%+

Cabotegravir Impurity 8 structure

Cabotegravir Impurity 8

CAS: 1616340-68-1

In Stock97%+

(S)-3-(3-(((3,4-Dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7,8-dimethoxy-4,5-dihydro-1H-benzo[d]azepine-1,2(3H)-dione (Ivabradine Impurity) structure

(S)-3-(3-(((3,4-Dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7,8-dimethoxy-4,5-dihydro-1H-benzo[d]azepine-1,2(3H)-dione (Ivabradine Impurity)

CAS: 1616710-52-1

In Stock97%+

Tebipenem Impurity N1 structure

Tebipenem Impurity N1

CAS: 161715-20-4

In Stock97%+

Prasugrel Impurity 21 structure

Prasugrel Impurity 21

CAS: 1618107-95-1

In Stock97%+

Alogliptin Impurity 11 structure

Alogliptin Impurity 11

CAS: 1618644-32-8

In Stock97%+

Neostigmine Methyl Sulfate - Impurity A (Bromide Salt) structure

Neostigmine Methyl Sulfate - Impurity A (Bromide Salt)

CAS: 1620-19-5

In Stock97%+

Trametinib Impurity N5 structure

Trametinib Impurity N5

CAS: 1620017-29-9

In Stock97%+

Memantine Impurity N1(Mixture of Diastereomers) structure

Memantine Impurity N1(Mixture of Diastereomers)

CAS: 16207-81-1

In Stock97%+

Danazol Impurity 31 structure

Danazol Impurity 31

CAS: 162070-22-6

In Stock97%+

Danazol Impurity 22 structure

Danazol Impurity 22

CAS: 162070-23-7

In Stock97%+

Danazol Impurity 27 structure

Danazol Impurity 27

CAS: 162070-24-8

In Stock97%+

Vildagliptin Impurity 61 structure

Vildagliptin Impurity 61

CAS: 16214-29-2

In Stock97%+

Pidotimod Impurity D structure

Pidotimod Impurity D

CAS: 162148-15-4

In Stock97%+

Ezetimibe Impurtiy N5 structure

Ezetimibe Impurtiy N5

CAS: 1621715-63-6

In Stock97%+

N-Nitroso Piroxicam Impurity 9 structure

N-Nitroso Piroxicam Impurity 9

CAS: 16219-98-0

In Stock97%+

Amidotrizoic Acid EP Impurity B structure

Amidotrizoic Acid EP Impurity B

CAS: 162193-52-4

In Stock97%+

Amidotrizoic Acid Dihydrate - Impurity C structure

Amidotrizoic Acid Dihydrate - Impurity C

CAS: 162193-53-5

In Stock97%+

Pyridoxine Impurity 43 structure

Pyridoxine Impurity 43

CAS: 1622-67-9

In Stock97%+

Nortriptyline EP Impurity G structure

Nortriptyline EP Impurity G

CAS: 16234-88-1

In Stock97%+

Fingolimod Impurity 54 structure

Fingolimod Impurity 54

CAS: 162361-39-9

In Stock97%+

Fingolimod Hydrochloride EP Impurity B structure

Fingolimod Hydrochloride EP Impurity B

CAS: 162361-44-6

In Stock97%+

Roflumilast Impurity C65 structure

Roflumilast Impurity C65

CAS: 162401-60-7

In Stock97%+

Choline Impurity 5 structure

Choline Impurity 5

CAS: 162440-04-2

In Stock97%+

Montelukast Impurity N1 structure

Montelukast Impurity N1

CAS: 162489-70-5

In Stock97%+

Montelukast Impurity N2 structure

Montelukast Impurity N2

CAS: 162515-66-4

In Stock97%+

Montelukast Disulfide Impurity structure

Montelukast Disulfide Impurity

CAS: 162515-67-5

In Stock97%+

Cabozantinib Impurity N1 structure

Cabozantinib Impurity N1

CAS: 1628530-38-0

In Stock97%+

UR-144 Impurity 1 (N-(5-Bromopentyl) UR-144) structure

UR-144 Impurity 1 (N-(5-Bromopentyl) UR-144)

CAS: 1628690-26-5

In Stock97%+

Testosterone Impurity N9 structure

Testosterone Impurity N9

CAS: 162890-98-4

In Stock97%+

Ticagrelor Impurity 162 structure

Ticagrelor Impurity 162

CAS: 16292-86-7

In Stock97%+

Tolterodine Benzopyranone Impurity structure

Tolterodine Benzopyranone Impurity

CAS: 16299-22-2

In Stock97%+

Aliskiren Hemifumarate (SSSR Isomer) Impurity structure

Aliskiren Hemifumarate (SSSR Isomer) Impurity

CAS: 1630036-82-6

In Stock97%+

Medroxyprogesterone Impurity N1 structure

Medroxyprogesterone Impurity N1

CAS: 16319-93-0

In Stock97%+

Calcium Phenylpyruvate Impurity 1 structure

Calcium Phenylpyruvate Impurity 1

CAS: 1632-49-1

In Stock97%+

Esaxerenone Impurity N4 structure

Esaxerenone Impurity N4

CAS: 1632006-28-0

In Stock97%+

Regadenoson Impurity N1 structure

Regadenoson Impurity N1

CAS: 16321-99-6

In Stock97%+

Eperisone Impurity 8 structure

Eperisone Impurity 8

CAS: 163437-01-2

In Stock97%+

Vilazodone impurity 02 structure

Vilazodone impurity 02

CAS: 163521-11-7

In Stock97%+

Vilazodone impurity 01 structure

Vilazodone impurity 01

CAS: 163521-19-5

In Stock97%+

Cangrelor Impurity 5 structure

Cangrelor Impurity 5

CAS: 163706-51-2

In Stock97%+

Cangrelor Impurity 12 structure

Cangrelor Impurity 12

CAS: 163706-57-8

In Stock97%+

Cinacalcet Impurity N16 Hydrochloride structure

Cinacalcet Impurity N16 Hydrochloride

CAS: 163831-65-0

In Stock97%+

Levocetirizine Impurity 11 structure

Levocetirizine Impurity 11

CAS: 163837-57-8

In Stock>95%

Prazosin Impurity 3 structure

Prazosin Impurity 3

CAS: 163838-98-0

In Stock97%+

Suvorexant Impurity 3 structure

Suvorexant Impurity 3

CAS: 1638743-92-6

In Stock97%+

2-((1-Acetyl-3-iodo-1H-indazol-6-yl)thio)-N-methylbenzamide (Axitinib Impurity) structure

2-((1-Acetyl-3-iodo-1H-indazol-6-yl)thio)-N-methylbenzamide (Axitinib Impurity)

CAS: 1639138-00-3

In Stock97%+

Norethindrone Impurity 5 structure

Norethindrone Impurity 5

CAS: 16392-60-2

In Stock97%+

Acotiamide Impurity 25 structure

Acotiamide Impurity 25

CAS: 163936-30-9

In Stock97%+

Edaravone Impurity N5 structure

Edaravone Impurity N5

CAS: 16394-90-4

In Stock97%+

Tegoprazan Impurity N18 structure

Tegoprazan Impurity N18

CAS: 1640981-16-3

In Stock97%+

Naftifine Impurity 6 structure

Naftifine Impurity 6

CAS: 16413-71-1

In Stock97%+

Olaparib Impurity 73 structure

Olaparib Impurity 73

CAS: 164149-28-4

In Stock97%+

Ampicillin Trihydrate - Impurity D (Sodium Salt) structure

Ampicillin Trihydrate - Impurity D (Sodium Salt)

CAS: 1642559-70-3

In Stock97%+

Amoxicillin EP Impurity D Na structure

Amoxicillin EP Impurity D Na

CAS: 1642559-71-4

In Stock>90%

Etizolam Impurity C62 structure

Etizolam Impurity C62

CAS: 16437-59-5

In Stock97%+

Ruxolitinib Impurity N3 structure

Ruxolitinib Impurity N3

CAS: 1643967-75-2

In Stock97%+

Pemetrexed Impurity structure

Pemetrexed Impurity

CAS: 1644286-35-0

In Stock97%+

Trospium Impurity N2 structure

Trospium Impurity N2

CAS: 16444-19-2

In Stock97%+

Dutasteride Impurity N88 structure

Dutasteride Impurity N88

CAS: 164656-21-7

In Stock97%+

Bortezomib Impurity 27 Sodium Salt structure

Bortezomib Impurity 27 Sodium Salt

CAS: 16480-57-2

In Stock97%+

Podophyllotoxin Impurity 8 structure

Podophyllotoxin Impurity 8

CAS: 16481-54-2

In Stock97%+

Pemetrexed Impurity 54 structure

Pemetrexed Impurity 54

CAS: 165049-28-5

In Stock97%+

Posaconazole Impurity 66 structure

Posaconazole Impurity 66

CAS: 165115-83-3

In Stock97%+

Iopromide Impurity 24 structure

Iopromide Impurity 24

CAS: 1651211-76-5

In Stock97%+

Losartan Impurity G structure

Losartan Impurity G

CAS: 165276-38-0

In Stock97%+

Bisphenol A Impurity 11 structure

Bisphenol A Impurity 11

CAS: 16530-58-8

In Stock97%+

Testosterone Impurity N1 structure

Testosterone Impurity N1

CAS: 165304-83-6

In Stock97%+

Ascorbic Acid Impurity C structure

Ascorbic Acid Impurity C

CAS: 16533-48-5

In Stock97%+

Valganciclovir Impurity C17 HCI structure

Valganciclovir Impurity C17 HCI

CAS: 1654737-32-2

In Stock97%+

Vitamin B6 Impurity Pyridoxine N-Oxide structure

Vitamin B6 Impurity Pyridoxine N-Oxide

CAS: 16567-04-7

In Stock>95%

Rociletinib Impurity N1 structure

Rociletinib Impurity N1

CAS: 165897-63-2

In Stock97%+

Sarpogrelate Impurity 17 HCl structure

Sarpogrelate Impurity 17 HCl

CAS: 1659311-40-6(free base)

In Stock97%+

Rotigotine Impurity N39 structure

Rotigotine Impurity N39

CAS: 165950-84-5

In Stock97%+

Norfloxacin Impurity 3 structure

Norfloxacin Impurity 3

CAS: 16600-24-1

In Stock97%+

Cedrusin Impurity 1 (3,4-O-Dimethylcedrusin) structure

Cedrusin Impurity 1 (3,4-O-Dimethylcedrusin)

CAS: 166021-14-3

In Stock97%+

Buprenorphine Impurity 14 structure

Buprenorphine Impurity 14

CAS: 16614-59-8

In Stock97%+

Phloroglucinol Impurity 31 structure

Phloroglucinol Impurity 31

CAS: 1664-27-3

In Stock97%+

Lansoprazole Impurity 10027-0318 structure

Lansoprazole Impurity 10027-0318

CAS: 166521-98-8

In Stock97%+

Cinacalcet Impurity 25 structure

Cinacalcet Impurity 25

CAS: 166947-09-7

In Stock97%+

Cinnarizine Impurity 1 structure

Cinnarizine Impurity 1

CAS: 16699-20-0

In Stock97%+

Pitavastatin Impurity N2 structure

Pitavastatin Impurity N2

CAS: 167073-19-0

In Stock97%+

Chlorpyrifos Impurity 1 structure

Chlorpyrifos Impurity 1

CAS: 167100-86-9

In Stock97%+

Cholesterol Impurity 34 structure

Cholesterol Impurity 34

CAS: 16711-66-3

In Stock97%+

Sofosbuvir Impurity 54 structure

Sofosbuvir Impurity 54

CAS: 16731-31-0

In Stock97%+

Fluphenazine Impurity 7 structure

Fluphenazine Impurity 7

CAS: 1675-46-3

In Stock97%+

Brivaracetam Impurity 57 structure

Brivaracetam Impurity 57

CAS: 16750-40-6

In Stock97%+

Azilsartan Impurity N2 structure

Azilsartan Impurity N2

CAS: 1675221-59-6

In Stock97%+

Cabozantinib Impurity 43 structure

Cabozantinib Impurity 43

CAS: 1677-29-8

In Stock97%+

Rifapentine Impurity N1 (3-Formyl-Desacetyl Rifapentine) structure

Rifapentine Impurity N1 (3-Formyl-Desacetyl Rifapentine)

CAS: 16783-97-4

In Stock97%+

Valsartan Impurity 1 structure

Valsartan Impurity 1

CAS: 168072-17-1

In Stock97%+

Tenofovir Impurity 88 structure

Tenofovir Impurity 88

CAS: 1681-15-8

In Stock97%+

Carfilzomib Related Impurity ((S)-2-amino-4-oxo-4-phenylbutanoic acid hydrochloride) structure

Carfilzomib Related Impurity ((S)-2-amino-4-oxo-4-phenylbutanoic acid hydrochloride)

CAS: 168154-76-5

In Stock97%+

Montelukast Dehydro Impurity structure

Montelukast Dehydro Impurity

CAS: 168214-68-4

In Stock97%+

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