CATO Standards
Contact Us +86 138 2978 8188
Home / Products / Pharmaceutical Impurity Reference Standards
Product Category

Pharmaceutical Impurity Reference Standards

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

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%+

« Prev1…1617181920…80Next »