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.

Fingolimod EP impurity G structure

Fingolimod EP impurity G

CAS: 1807973-92-7

In Stock97%+

Lurasidone Impurity 17 structure

Lurasidone Impurity 17

CAS: 1807983-67-0

In Stock97%+

Ticagrelor Impurity 14 structure

Ticagrelor Impurity 14

CAS: 1808068-84-9

In Stock97%+

Repaglinide Impurity 15 structure

Repaglinide Impurity 15

CAS: 1809091-07-3

In Stock97%+

azapropazone impurity A structure

azapropazone impurity A

CAS: 18091-57-1

In Stock97%+

Atovaquone EP Impurity C structure

Atovaquone EP Impurity C

CAS: 1809464-27-4

In Stock97%+

Mexiletine Impurity N3 structure

Mexiletine Impurity N3

CAS: 180966-61-4

In Stock97%+

Guaiacol EP Impurity D structure

Guaiacol EP Impurity D

CAS: 18113-18-3

In Stock97%+

Pregabalin Impurity 13 structure

Pregabalin Impurity 13

CAS: 181289-17-8

In Stock97%+

Pregabalin Impurity 123 structure

Pregabalin Impurity 123

CAS: 181289-21-4

In Stock97%+

Cinacalcet Impurity 19 structure

Cinacalcet Impurity 19

CAS: 1813-96-3

In Stock97%+

Lobaplatin Impurity 1 DiHCl structure

Lobaplatin Impurity 1 DiHCl

CAS: 181486-56-6

In Stock97%+

Lamivudine EP Impurity F-13C-15N2 structure

Lamivudine EP Impurity F-13C-15N2

CAS: 181517-11-3

In Stock97%+

Vortioxetine impurity 114 HCl structure

Vortioxetine impurity 114 HCl

CAS: 3077786-27-4

In Stock>95%

3-Fluoro-a-(2-methyl-1-oxopropyl)-?-oxo-N,ß-diphenyl-benzenebutanamide structure

3-Fluoro-a-(2-methyl-1-oxopropyl)-?-oxo-N,ß-diphenyl-benzenebutanamide

CAS: 1817798-20-1

In Stock>95%

Sacubitril Impurity C32 structure

Sacubitril Impurity C32

CAS: 1817838-91-7

In Stock97%+

Guanosine Impurity 6 structure

Guanosine Impurity 6

CAS: 18186-48-6

In Stock97%+

Dydrogesterone Impurity 1 structure

Dydrogesterone Impurity 1

CAS: 1819-14-3

In Stock97%+

HISTIDINE Impurity N1 structure

HISTIDINE Impurity N1

CAS: CATO-C1416939

In Stock97%+

Alectinib impurity 03 structure

Alectinib impurity 03

CAS: 1820882-01-6

In Stock97%+

Osimertinib Impurity N3 structure

Osimertinib Impurity N3

CAS: 1820891-36-8

In Stock97%+

Imatinib EP Impurity D structure

Imatinib EP Impurity D

CAS: 1821122-73-9

In Stock97%+

Oxazepam EP Impurity B structure

Oxazepam EP Impurity B

CAS: 1824-74-4

In Stock97%+

Metformin Impurity 27 structure

Metformin Impurity 27

CAS: 18240-93-2

In Stock97%+

Sitagliptin Impurity 3 structure

Sitagliptin Impurity 3

CAS: 1824443-71-1

In Stock97%+

Lanreotide Impurity 32 structure

Lanreotide Impurity 32

CAS: 182482-12-8

In Stock97%+

Risdiplam Impurity C26 structure

Risdiplam Impurity C26

CAS: 1825352-87-1

In Stock97%+

Brimonidine Related Impurity 4 structure

Brimonidine Related Impurity 4

CAS: 182628-02-0

In Stock97%+

Gatifloxacin Impurity C79 structure

Gatifloxacin Impurity C79

CAS: 182868-72-0

In Stock97%+

Norgestimate EP Impurity A (Norgestimate USP Related Compound A) (Mixture of Enantiomers) structure

Norgestimate EP Impurity A (Norgestimate USP Related Compound A) (Mixture of Enantiomers)

CAS: 18290-31-8

In Stock97%+

Cabazitaxel Impurity N1 structure

Cabazitaxel Impurity N1

CAS: 183133-94-0

In Stock97%+

Cephalomannine Impurity 2 structure

Cephalomannine Impurity 2

CAS: 183133-99-5

In Stock97%+

Tipiracil Impurity N2 HCl structure

Tipiracil Impurity N2 HCl

CAS: 183204-72-0

In Stock97%+

Acedoben Impurity 8 structure

Acedoben Impurity 8

CAS: 183430-33-3

In Stock97%+

Josamycin EP Impurity I structure

Josamycin EP Impurity I

CAS: 18361-47-2

In Stock97%+

Josamycin EP Impurity K structure

Josamycin EP Impurity K

CAS: 18361-48-3

In Stock97%+

Josamycin EP Impurity G structure

Josamycin EP Impurity G

CAS: 18361-49-4

In Stock97%+

Josamycin Impurity M structure

Josamycin Impurity M

CAS: 18361-50-7

In Stock97%+

Ibrutinib Impurity N1 structure

Ibrutinib Impurity N1

CAS: 1838132-94-7

In Stock97%+

Posaconazole Impurity N2 structure

Posaconazole Impurity N2

CAS: 183871-36-5

In Stock97%+

Nateglinide Impurity 6 structure

Nateglinide Impurity 6

CAS: 183997-00-4

In Stock97%+

Clarithromycin Impurity 21 structure

Clarithromycin Impurity 21

CAS: 18423-89-7

In Stock97%+

Gefitinib impurity 02 structure

Gefitinib impurity 02

CAS: 184475-50-1

In Stock97%+

Vildagliptin Dione Impurity structure

Vildagliptin Dione Impurity

CAS: 1844894-70-7

In Stock97%+

Flurbiprofen Impurity 54 structure

Flurbiprofen Impurity 54

CAS: 1845-59-6

In Stock97%+

Losartan Impurity 20 structure

Losartan Impurity 20

CAS: 1846587-44-7

In Stock97%+

Montelukast EP Impurity I structure

Montelukast EP Impurity I

CAS: 184763-26-6

In Stock97%+

Montelukast Methoxymethoxy Impurity structure

Montelukast Methoxymethoxy Impurity

CAS: 184764-27-0

In Stock97%+

Desoximetasone EP Impurity F structure

Desoximetasone EP Impurity F

CAS: 184899-80-7

In Stock97%+

Exemestane Diol Impurity structure

Exemestane Diol Impurity

CAS: 184972-11-0

In Stock97%+

Acotiamide Impurity 7 structure

Acotiamide Impurity 7

CAS: 185105-13-9

In Stock97%+

Acotiamide Impurity 8 Maleate structure

Acotiamide Impurity 8 Maleate

CAS: 185105-17-3

In Stock97%+

Nilotinib Impurity 17 structure

Nilotinib Impurity 17

CAS: 18595-17-0

In Stock97%+

Pregabalin Impurity 97 structure

Pregabalin Impurity 97

CAS: 186038-82-4

In Stock97%+

Apomorphine Impurity N1 structure

Apomorphine Impurity N1

CAS: 18605-40-8

In Stock97%+

Diphenhydramine Impurity N11 structure

Diphenhydramine Impurity N11

CAS: 18608-78-1

In Stock>95%

Ticagrelor Impurity N2 structure

Ticagrelor Impurity N2

CAS: 1863036-49-0

In Stock97%+

Rivaroxaban Impurity 7 structure

Rivaroxaban Impurity 7

CAS: 186348-58-3

In Stock97%+

Lenvatinib Impurity 77 structure

Lenvatinib Impurity 77

CAS: 1864-94-4

In Stock97%+

Gabapentin EP Impurity G Hydrochloride structure

Gabapentin EP Impurity G Hydrochloride

CAS: 1864053-94-0

In Stock97%+

Sibutramine Impurity J structure

Sibutramine Impurity J

CAS: 186521-85-7

In Stock97%+

Acedoben Impurity 10 structure

Acedoben Impurity 10

CAS: 186800-77-1

In Stock97%+

Abiraterone Impurity N30 structure

Abiraterone Impurity N30

CAS: 186826-70-0

In Stock97%+

Levodopa Impurity 6 structure

Levodopa Impurity 6

CAS: 18692-68-7

In Stock97%+

Fenofibrate Impurity N3 structure

Fenofibrate Impurity N3

CAS: 1871-38-1

In Stock97%+

Cabozantinib Impurity 19 structure

Cabozantinib Impurity 19

CAS: 18719-42-1

In Stock97%+

Cabozantinib Impurity 9 structure

Cabozantinib Impurity 9

CAS: 18721-64-7

In Stock97%+

Tramadol Impurity 2 structure

Tramadol Impurity 2

CAS: 187219-95-0

In Stock97%+

Methylaminolevulinate EP Impurity B-d2 HCl structure

Methylaminolevulinate EP Impurity B-d2 HCl

CAS: 187237-35-0

In Stock97%+

Abemaciclib Impurity N6 structure

Abemaciclib Impurity N6

CAS: 1873303-31-1

In Stock97%+

Fotagliptin Impurity 8 structure

Fotagliptin Impurity 8

CAS: 187458-77-1

In Stock97%+

Azelastine Impurity 12 structure

Azelastine Impurity 12

CAS: 1878-65-5

In Stock97%+

AB-PINACA Impurity 1（AB-PINACA Pentanoic Acid Metabolite） structure

AB-PINACA Impurity 1（AB-PINACA Pentanoic Acid Metabolite）

CAS: 1879029-93-2

In Stock97%+

Phenylephrine Impurity N1 structure

Phenylephrine Impurity N1

CAS: 18791-20-3

In Stock97%+

Papaverine Impurity 2 structure

Papaverine Impurity 2

CAS: 18813-60-0

In Stock97%+

Temazepam EP Impurity C structure

Temazepam EP Impurity C

CAS: 18818-64-9

In Stock97%+

Ticagrelor EP Impurity D Hydrochloride structure

Ticagrelor EP Impurity D Hydrochloride

CAS: 1883662-29-0

In Stock97%+

Mirogabalin Impurity N10 structure

Mirogabalin Impurity N10

CAS: 188398-87-0

In Stock97%+

Tramadol Impurity 1 structure

Tramadol Impurity 1

CAS: 1884-42-0

In Stock97%+

Testosterone Impurity 10 structure

Testosterone Impurity 10

CAS: 18841-73-1

In Stock97%+

Voriconazole Impurity 78 structure

Voriconazole Impurity 78

CAS: 188416-27-5

In Stock97%+

Dutasteride Impurity N5 structure

Dutasteride Impurity N5

CAS: 188589-61-9

In Stock97%+

Dutasteride Impurity N6 structure

Dutasteride Impurity N6

CAS: 188589-66-4

In Stock97%+

Hexetidine - Impurity A structure

Hexetidine - Impurity A

CAS: 188655-38-1

In Stock97%+

Nebivolol Impurity 44 structure

Nebivolol Impurity 44

CAS: 18867-45-3

In Stock97%+

Omeprazole Impurity 2 structure

Omeprazole Impurity 2

CAS: 188730-94-1

In Stock97%+

Lurasidone Impurity 21 structure

Lurasidone Impurity 21

CAS: 188797-79-7

In Stock97%+

Effinaconazole Methylene Methanone Impurity structure

Effinaconazole Methylene Methanone Impurity

CAS: 188904-84-9

In Stock97%+

Nelfinavir Oxazole Impurity (Impurity A) structure

Nelfinavir Oxazole Impurity (Impurity A)

CAS: 188936-07-4

In Stock97%+

Cyclophosphamide Impurity 14 structure

Cyclophosphamide Impurity 14

CAS: 18907-76-1

In Stock97%+

Racecadotril Impurity 2 structure

Racecadotril Impurity 2

CAS: 1892-31-5

In Stock97%+

Triamcinolone Acetonide Impurity N2 structure

Triamcinolone Acetonide Impurity N2

CAS: 1893-84-1

In Stock97%+

Ceftaroline Fosamil Impurity 13 structure

Ceftaroline Fosamil Impurity 13

CAS: 189345-52-6

In Stock97%+

Betahistine Impurity N1 structure

Betahistine Impurity N1

CAS: 1894608-21-9(free base)

In Stock97%+

Amidotrizoic Acid Impurity 2 structure

Amidotrizoic Acid Impurity 2

CAS: 189514-07-6

In Stock97%+

Tetra-O-Acetyl-Mannose Triflate For Radiopharmaceutical Preparations EP Impurity A structure

Tetra-O-Acetyl-Mannose Triflate For Radiopharmaceutical Preparations EP Impurity A

CAS: 18968-05-3

In Stock>95%

Thiamine Impurity 11 structure

Thiamine Impurity 11

CAS: 189745-28-6

In Stock97%+

Doxorubicin Impurity N2 HCl structure

Doxorubicin Impurity N2 HCl

CAS: 18977-93-0

In Stock97%+

Clevidipine Impurity C41 structure

Clevidipine Impurity C41

CAS: 1898262-46-8

In Stock97%+

Firocoxib Impurity 2 structure

Firocoxib Impurity 2

CAS: 189955-79-1

In Stock97%+

« Prev1…1920212223…80Next »