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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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Capecitabine, Impurities

Capecitabine EP Impurity B

$80.00 25 mg

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CAS No.

: 3094-09-5

Mol F.

: C9H11FN2O5

Mol W.

: 246.19

Cat No.

: SA37802

Capecitabine, Impurities

Capecitabine EP Impurity F

$150.00 25 mg

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CAS No.

: 921769-65-5

Mol F.

: C16H20FN3O7

Mol W.

: 385.34

Cat No.

: SA37806

Capecitabine, Impurities

Capecitabine Methoxy Analog

$350.00 25 mg

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CAS No.

: 296248-49-2

Mol F.

: C11H14FN3O6

Mol W.

: 303.24

Cat No.

: SA37810

Carbamazepine, Impurities

Carbamazepine 10,11-Epoxide

$95.00 25 mg

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CAS No.

: 36507-30-9

Mol F.

: C15H12N2O2

Mol W.

: 252.27

Cat No.

: SA20315

Carbamazepine, Impurities

Carbamazepine EP Impurity B

$95.00 25 mg

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CAS No.

: 611-64-3

Mol F.

: C14H11N

Mol W.

: 193.24

Cat No.

: SA20308

Carbamazepine, Impurities

Carbamazepine EP Impurity F

$75.00 25 mg

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CAS No.

: 33948-22-0

Mol F.

: C15H10ClNO

Mol W.

: 255.7

Cat No.

: SA20312

Carbamazepine, Impurities

Carbamazepine N-Bromocarbonyl Impurity

$395.00 25 mg

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CAS No.

: 40421-05-4

Mol F.

: C15H10BrNO

Mol W.

: 300.15

Cat No.

: SA20305

Carisoprodol, Impurities

Carbamyl Benzyl Ester

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CAS No.

: 621-84-1

Mol F.

: C₈H₉NO₂

Mol W.

: 151.16

Cat No.

: SA25308

Carbidopa, Impurities

Carbidopa

$75.00 25 mg

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CAS No.

: 38821-49-7

Mol F.

: C10H16N2O5

Mol W.

: 244.24

Cat No.

: SA31800

Carbidopa, Impurities

Carbidopa EP Impurity I

$595.00 25 mg

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CAS No.

: 1246819-09-9

Mol F.

: C10H13BrN2O4

Mol W.

: 305.13

Cat No.

: SA31809

Carbidopa, Impurities

Carbidopa EP Impurity J

$495.00 25 mg

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CAS No.

: 43197-33-7

Mol F.

: C10H13BrN2O4

Mol W.

: 305.13

Cat No.

: SA31810

Abacavir

Carbovir Monophosphate

$495.00 25 mg

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CAS No.

: 144490-73-3

Mol F.

: C11H14N5O5P

Mol W.

: 327.23

Cat No.

: SA18116

Carfilzomib, Impurities

Carfilzomib (2R,4R)-2-Hydroxy O-Acettyl Impurity

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CAS No.

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45005

Carfilzomib, Impurities

Carfilzomib (2R,4R)-Diol

Please enquire for price & pack size

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CAS No.

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45004

Carfilzomib, Impurities

Carfilzomib (2R,4R)-Diol (7R)-Isomer

Please enquire for price & pack size

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CAS No.

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45006

Carfilzomib, Impurities

Carfilzomib (2R,4S) Hydroxysuccinic Acid Impurity

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CAS No.

: NA

Mol F.

: C46H65N5014

Mol W.

: 912.05

Cat No.

: SA45016

Carfilzomib, Impurities

Carfilzomib (2R,4S)-2-Hydroxy O-Acetyl Impurity

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CAS No.

: 1541171-69-0

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45007

Carfilzomib, Impurities

Carfilzomib (2R,4S)-Diol

Please enquire for price & pack size

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CAS No.

: 1541172-75-1

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45003

Carfilzomib, Impurities

Carfilzomib (2S,4R) Diol Isomer

Please enquire for price & pack size

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CAS No.

: NA

Mol F.

: C40H59N5O8

Mol W.

: 737.94

Cat No.

: SA45018

Carfilzomib, Impurities

Carfilzomib (2S,4R)-2-Hydroxy O-Acetyl Impurity

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CAS No.

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45010

Carfilzomib, Impurities

Carfilzomib (2S,4R)-Diol (7R)-Isomer

Please enquire for price & pack size

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CAS No.

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45011

Carfilzomib, Impurities

Carfilzomib (2S,4S)-2-Hydroxy O-Acetyl Impurity

Please enquire for price & pack size

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CAS No.

: NA

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45012

Carfilzomib, Impurities

Carfilzomib Dimer Impurity-1

Please enquire for price & pack size

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CAS No.

Mol F.

: C65H88N8O10

Mol W.

: 1140.6

Cat No.

: SA45000

Carfilzomib, Impurities

Carfilzomib Dimer Impurity-2

Please enquire for price & pack size

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CAS No.

Mol F.

: C55H77N7O9

Mol W.

: 980.3

Cat No.

: SA45001

Carfilzomib, Impurities

Carfilzomib Enantiomer

Please enquire for price & pack size

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CAS No.

Mol F.

: C40H57N5O7

Mol W.

: 719.9

Cat No.

: SA45002

Carfilzomib, Impurities

Carfilzomib Methoxide

Please enquire for price & pack size

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CAS No.

Mol F.

: C32H44N4O6

Mol W.

: 580.71

Cat No.

: SA45009

Carfilzomib, Impurities

Carfilzomib Morpholinoacetamido L-leucine Impurity

Please enquire for price & pack size

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CAS No.

: 1396006-47-5

Mol F.

: C22H33N3O5

Mol W.

: 419.5

Cat No.

: SA45017

Cariprazine, Impurities

Cariprazine

Please enquire for price & pack size

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CAS No.

: 839712-12-8

Mol F.

: C21H32Cl2N4O

Mol W.

: 427.41

Cat No.

: SA39700

Cariprazine, Impurities

Cariprazine Amide Impurity | CAS : 2171074-48-7

Please enquire for price & pack size

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CAS No.

: 2171074-48-7

Mol F.

: C21H30Cl2N4O2

Mol W.

: 441.4

Cat No.

: SA39716

Cariprazine, Impurities

Cariprazine Amine Analog

Please enquire for price & pack size

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CAS No.

: 791778-53-5

Mol F.

: C18H27Cl2N3

Mol W.

: 356.33

Cat No.

: SA39705

Cariprazine, Impurities

Cariprazine Isopropyl Carbamate

Please enquire for price & pack size

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CAS No.

: 1231947-90-2

Mol F.

: C22H33Cl2N3O2

Mol W.

: 442.42

Cat No.

: SA39706

Cariprazine, Impurities

Cariprazine Urea Dimer

Please enquire for price & pack size

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CAS No.

: NA

Mol F.

: C37H52Cl4N6O

Mol W.

: 738.66

Cat No.

: SA39704

Carisoprodol, Impurities

Carisoprodol EP Impurity A

Please enquire for price & pack size

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CAS No.

: 25462-17-3

Mol F.

: C₁₁H₂₃NO₃

Mol W.

: 217.31

Cat No.

: SA25302

Carisoprodol, Impurities

Carisoprodol Isopropyl Impurity

Please enquire for price & pack size

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CAS No.

: 1729-14-2

Mol F.

: C₁₅H₃₀N₂O₄

Mol W.

: 302.41

Cat No.

: SA25309

Carvedilol, Impurities

Carvedilol

Please enquire for price & pack size

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CAS No.

: 72956-09-3

Mol F.

: C₂₄H₂₆N₂O₄

Mol W.

: 406.47

Cat No.

: SA31700

Carvedilol, Impurities

Carvedilol (R)-Isomer

Please enquire for price & pack size

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CAS No.

: 95093-99-5

Mol F.

: C24H26N2O4

Mol W.

: 406.47

Cat No.

: SA31701

Carvedilol, Impurities

Carvedilol (S)-Isomer

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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CAS No.

: 52602-39-8

Mol F.

: C12H9NO

Mol W.

: 183.21

Cat No.

: SA31719

Carvedilol, Impurities

Carvedilol Biscarbazole Impurity

Please enquire for price & pack size

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CAS No.

: 1276477-91-8

Mol F.

: C27H22N2O3

Mol W.

: 422.48

Cat No.

: SA31711

Carvedilol, Impurities

Carvedilol Carbazole Impurity

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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CAS No.

: 64464-07-9

Mol F.

: C9H13NO2

Mol W.

: 167.21

Cat No.

: SA31707

Carvedilol, Impurities

Carvedilol Ketone Impurity

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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CAS No.

: 1346602-98-9

Mol F.

: C40H42N4O6

Mol W.

: 674.78

Cat No.

: SA31709