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Impurities

SynThink is a trusted producer and supplier of Pharmaceutical Reference Standards, including Impurity Standards. These materials are essential for pharmaceutical companies conducting research into the quality, stability, and biological safety of drug products. We maintain a robust inventory of API impurities, ready to support your development and regulatory needs.

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Cariprazine, Impurities

Cariprazine 2,3-Dichloroaniline Impurity

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CAS No.

: 608-27-5

Mol F.

: C6H5Cl2N

Mol W.

: 162.01

Cat No.

: SA39719

Cariprazine, Impurities

Cariprazine 2,4-Dichlorophenyl Piperazine Impurity

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CAS No.

: 1013-78-1

Mol F.

: C10H12Cl2N2

Mol W.

: 231.1

Cat No.

: SA39720

Cariprazine, Impurities

Cariprazine 3,4-Dichloroaniline Impurity

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CAS No.

: 95-76-1

Mol F.

: C6H5Cl2N

Mol W.

: 162.02

Cat No.

: SA39725

Cariprazine, Impurities

Cariprazine 4-aminocyclohexyl Ethyl Ester Impurity

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CAS No.

: 76308-15-1

Mol F.

: C10H19NO2

Mol W.

: 185.3

Cat No.

: SA39722

Cariprazine, Impurities

Cariprazine Acetyl Impurity

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CAS No.

: 1092822-52-0

Mol F.

: C20H29Cl2N3O

Mol W.

: 398.4

Cat No.

: SA39728

Cariprazine, Impurities

Cariprazine Amide Impurity | CAS : 2171074-48-7

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CAS No.

: 2171074-48-7

Mol F.

: C21H30Cl2N4O2

Mol W.

: 441.4

Cat No.

: SA39716

Cariprazine

Cariprazine Amine Analog

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CAS No.

: 791778-53-5

Mol F.

: C18H27Cl2N3

Mol W.

: 356.33

Cat No.

: SA39705

Cariprazine

Cariprazine Cyclohexyl Acetic Acid Impurity

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CAS No.

: 1957145-59-3

Mol F.

: C11H20N2O3

Mol W.

: 228.3

Cat No.

: SA39717

Cariprazine

Cariprazine Dichlorophenyl Piperazine Carbamate Impurity

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CAS No.

: 506427-91-4

Mol F.

: C23H35Cl2N3O2

Mol W.

: 456.5

Cat No.

: SA39724

Cariprazine, Impurities

Cariprazine Diethyl Analog

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CAS No.

: 839712-22-0

Mol F.

: C23H36Cl2N4O

Mol W.

: 455.5

Cat No.

: SA39726

Cariprazine

Cariprazine Dimer Impurity

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CAS No.

: NA

Mol F.

: C29H37Cl4N5O

Mol W.

: 613.45

Cat No.

: SA39723

Cariprazine, Impurities

Cariprazine Isopropyl Carbamate

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CAS No.

: 1231947-90-2

Mol F.

: C22H33Cl2N3O2

Mol W.

: 442.42

Cat No.

: SA39706

Cariprazine

Cariprazine Methyl Ester Impurity

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CAS No.

: NA

Mol F.

: C12H22N2O3

Mol W.

: 242.3

Cat No.

: SA39718

Cariprazine, Impurities

Cariprazine Propyl Ethyl Analog

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CAS No.

: NA

Mol F.

: C24H38Cl2N4O

Mol W.

: 469.5

Cat No.

: SA39727

Cariprazine, Impurities

Cariprazine Urea Dimer

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CAS No.

: NA

Mol F.

: C37H52Cl4N6O

Mol W.

: 738.66

Cat No.

: SA39704

Carisoprodol, Impurities

Carisoprodol EP Impurity A

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CAS No.

: 25462-17-3

Mol F.

: C₁₁H₂₃NO₃

Mol W.

: 217.31

Cat No.

: SA25302

Carisoprodol, Impurities

Carisoprodol Isopropyl Impurity

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CAS No.

: 1729-14-2

Mol F.

: C₁₅H₃₀N₂O₄

Mol W.

: 302.41

Cat No.

: SA25309

Carvedilol, Impurities

Carvedilol

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CAS No.

: 72956-09-3

Mol F.

: C₂₄H₂₆N₂O₄

Mol W.

: 406.47

Cat No.

: SA31700

Carvedilol, Impurities

Carvedilol (R)-Isomer

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CAS No.

: 95093-99-5

Mol F.

: C24H26N2O4

Mol W.

: 406.47

Cat No.

: SA31701

Carvedilol, Impurities

Carvedilol (S)-Isomer

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CAS No.

: 95094-00-1

Mol F.

: C24H26N2O4

Mol W.

: 406.47

Cat No.

: SA31702

Carvedilol, Impurities

Carvedilol 4-Hydroxy Metabolite

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CAS No.

: 142227-49-4

Mol F.

: C24H26N2O5

Mol W.

: 422.47

Cat No.

: SA31720

Carvedilol, Impurities

Carvedilol 4-Hydroxycarbazole Impurity

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CAS No.

: 52602-39-8

Mol F.

: C12H9NO

Mol W.

: 183.21

Cat No.

: SA31719

Carvedilol, Impurities

Carvedilol Biscarbazole Impurity

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CAS No.

: 1276477-91-8

Mol F.

: C27H22N2O3

Mol W.

: 422.48

Cat No.

: SA31711

Carvedilol, Impurities

Carvedilol Carbazole Impurity

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CAS No.

: 86-74-8

Mol F.

: C12H9N

Mol W.

: 167.21

Cat No.

: SA31712

Carvedilol, Impurities

Carvedilol EP Impurity A

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CAS No.

: 1198090-73-1

Mol F.

: C36H43N3O7

Mol W.

: 629.74

Cat No.

: SA31703

Carvedilol, Impurities

Carvedilol EP Impurity B

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CAS No.

: 918903-20-5

Mol F.

: C39H39N3O6

Mol W.

: 645.74

Cat No.

: SA31704

Carvedilol, Impurities

Carvedilol EP Impurity C

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CAS No.

: 72955-94-3

Mol F.

: C31H32N2O4

Mol W.

: 496.6

Cat No.

: SA31705

Carvedilol, Impurities

Carvedilol EP Impurity D

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CAS No.

: 51997-51-4

Mol F.

: C15H13NO2

Mol W.

: 239.27

Cat No.

: SA31706

Carvedilol, Impurities

Carvedilol EP Impurity E

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CAS No.

: 64464-07-9

Mol F.

: C9H13NO2

Mol W.

: 167.21

Cat No.

: SA31707

Carvedilol, Impurities

Carvedilol Ketone Impurity

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CAS No.

: 933442-50-3

Mol F.

: C24H24N2O4

Mol W.

: 404.46

Cat No.

: SA31713

Carvedilol, Impurities, Nitrosamine

Carvedilol Nitroso Impurity

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CAS No.

: 2248746-67-8

Mol F.

: C24H25N3O5

Mol W.

: 435.5

Cat No.

: SA44696

Carvedilol, Impurities

Carvedilol O-Desmethyl Impurity

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CAS No.

: 72956-44-6

Mol F.

: C23H24N2O4

Mol W.

: 392.45

Cat No.

: SA31714

Carvedilol, Impurities

Carvedilol O-Desmethyl O-Alkyl Impurity

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CAS No.

: 1346602-98-9

Mol F.

: C40H42N4O6

Mol W.

: 674.78

Cat No.

: SA31709

Carvedilol, Impurities

Carvedilol O-Desmethyl O-Aminoethyl Impurity

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CAS No.

: 1391052-10-0

Mol F.

: C25H29N3O4

Mol W.

: 435.52

Cat No.

: SA31715

Carvedilol, Impurities

Carvedilol O-Desmethyl O-Benzyl Impurity

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CAS No.

: 72955-92-1

Mol F.

: C30H30N2O4

Mol W.

: 482.57

Cat No.

: SA31716

Carvedilol, Impurities

Carvedilol p-Benzyloxy Impurity

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CAS No.

: 887352-95-6

Mol F.

: C31H32N2O5

Mol W.

: 512.6

Cat No.

: SA31717

Carvedilol, Impurities

Carvedilol Propanediol Impurity

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CAS No.

: 123119-89-1

Mol F.

: C15H15NO3

Mol W.

: 257.28

Cat No.

: SA31718

Cefaclor, Impurities

Cefaclor EP Impurity A

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CAS No.

: 875-74-1

Mol F.

: C8H9NO2

Mol W.

: 151.16

Cat No.

: SA18706

Cefaclor, Impurities

Cefaclor EP Impurity B

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CAS No.

: 53994-69-7

Mol F.

: C7H7ClN2O3S

Mol W.

: 234.66

Cat No.

: SA18707

Cefaclor, Impurities

Cefaclor EP Impurity E

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CAS No.

: 188915-50-6

Mol F.

: C14H14ClN304S

Mol W.

: 355.8

Cat No.

: SA18702

Cefaclor, Impurities

Cefaclor Monohydrate

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CAS No.

: 70356-03-5

Mol F.

: C15H16ClN3O5S

Mol W.

: 385.82

Cat No.

: SA18700

Cefadroxil, Impurities

Cefadroxil delta-3 Isomer

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CAS No.

: 147103-94-4

Mol F.

: C16H17N3O5S

Mol W.

: 363.39

Cat No.

: SA42301

Cefadroxil, Impurities

Cefadroxil EP Impurity A

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CAS No.

: 22818-40-2

Mol F.

: C8H9NO4

Mol W.

: 168.16

Cat No.

: SA42310

Cefadroxil, Impurities

Cefadroxil EP Impurity B (7-ADCA)

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CAS No.

: 22252-43-3

Mol F.

: C8H10N2O3S

Mol W.

: 214.24

Cat No.

: SA42309

Cefadroxil, Impurities

Cefadroxil EP Impurity F

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CAS No.

: 147103-95-5

Mol F.

: C24H24N4O7S

Mol W.

: 512.53

Cat No.

: SA42306

Cefadroxil, Impurities

Cefadroxil Impurity E

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CAS No.

: 147103-93-3

Mol F.

: C11H11N3O3

Mol W.

: 233.2

Cat No.

: SA42313

Cefadroxil, Impurities

Cefadroxil Monohydrate

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CAS No.

: 66592-87-8

Mol F.

: C16H19N3O6S

Mol W.

: 381.4

Cat No.

: SA42300

Cephalexin, Impurities

Cefalexin EP Impurity G; Isocefalexine

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CAS No.

: 67308-21-8 (acid); 37050-97-8 (sodiumsalt)

Mol F.

: C16H17N3O4S

Mol W.

: 347.39

Cat No.

: SA12016

Cephalexin, Impurities

Cefalexin Monohydrate

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CAS No.

: 15686-71-2 (anhydrous); 23325-78-2 (monohydrate)

Mol F.

: C16H19N3O5S

Mol W.

: 365.4

Cat No.

: SA12015

Cefprozil, Impurities

Cefprozil

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CAS No.

: 92665-29-7

Mol F.

: C18H19N3O5S

Mol W.

: 389.43

Cat No.

: SA31900