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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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Impurities, Sofosbuvir

Sofosbuvir Impurity SA15421; Sofosbuvir Carboxylic Acid

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CAS No.

Mol F.

: C19H24FN3O9P

Mol W.

: 488.12

Cat No.

: SA15421

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15422

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CAS No.

: 2041584-99-8

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15422

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15423

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CAS No.

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15423

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15424

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CAS No.

: 1987950-05-9

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15424

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15425

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CAS No.

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15425

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15426

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CAS No.

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15426

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15427

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CAS No.

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15427

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15429

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CAS No.

: 1496551-65-5

Mol F.

: C20H17ClO6

Mol W.

: 388.8

Cat No.

: SA15429

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15430

$595.00 25 mg

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CAS No.

: 1015073-43-4

Mol F.

: C10H14N2O8P

Mol W.

: 340.2

Cat No.

: SA15430

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15436

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CAS No.

Mol F.

: C17H19N3O6

Mol W.

: 361.35

Cat No.

: SA15436

Impurities, Solifenacin

Solifenacin

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CAS No.

: 180468-39-7

Mol F.

: C23H27ClN2O2

Mol W.

: 398.93

Cat No.

: SA32600

Impurities, Solifenacin

Solifenacin (S)-Hydroxyquinuclidine Impurity

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CAS No.

: 34583-34-1

Mol F.

: C7H13NO

Mol W.

: 127.18

Cat No.

: SA32617

Impurities, Solifenacin

Solifenacin Benzoyl (R)-Quinuclidinyl Impurity

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CAS No.

: 1956436-64-8

Mol F.

: C23H26N2O3

Mol W.

: 378.46

Cat No.

: SA32618

Impurities, Solifenacin

Solifenacin Benzoyl (S)-Quinuclidinyl Impurity

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CAS No.

Mol F.

: C23H26N2O3

Mol W.

: 378.46

Cat No.

: SA32619

Impurities, Solifenacin

Solifenacin cis-Hydroxy Impurity

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CAS No.

: 201660-36-8

Mol F.

: C23H26N2O3

Mol W.

: 378.46

Cat No.

: SA32613

Impurities, Solifenacin

Solifenacin EP Impurity A

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CAS No.

: 118864-75-8

Mol F.

: C15H15N

Mol W.

: 209.29

Cat No.

: SA32601

Impurities, Solifenacin

Solifenacin EP Impurity B

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CAS No.

: 1353274-25-5

Mol F.

: C19H21NO2

Mol W.

: 295.38

Cat No.

: SA32602

Impurities, Solifenacin

Solifenacin EP Impurity C

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CAS No.

: 1534326-81-2

Mol F.

: C31H28N2O

Mol W.

: 444.57

Cat No.

: SA32603

Impurities, Solifenacin

Solifenacin EP Impurity D

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CAS No.

: 2216750-52-4

Mol F.

: C31H28N2O

Mol W.

: 444.57

Cat No.

: SA32604

Impurities, Solifenacin

Solifenacin EP Impurity E

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CAS No.

: 25333-42-0

Mol F.

: C7H13NO

Mol W.

: 127.18

Cat No.

: SA32605

Impurities, Solifenacin

Solifenacin EP Impurity F

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CAS No.

: 180468-40-0

Mol F.

: C23H27ClN2O2

Mol W.

: 398.93

Cat No.

: SA32606

Impurities, Solifenacin

Solifenacin EP Impurity G

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CAS No.

: 740780-79-4;862207-70-3

Mol F.

: C23H26N2O2

Mol W.

: 362.46

Cat No.

: SA32607

Impurities, Solifenacin

Solifenacin EP Impurity H

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CAS No.

: 180468-38-6

Mol F.

: C23H27ClN2O2

Mol W.

: 398.93

Cat No.

: SA32608

Impurities, Solifenacin

Solifenacin EP Impurity I

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CAS No.

: 180272-28-0

Mol F.

: C23H26N2O3

Mol W.

: 378.46

Cat No.

: SA32609

Impurities, Solifenacin

Solifenacin Ethyl Ester Impurity

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CAS No.

: 180468-42-2

Mol F.

: C18H19NO2

Mol W.

: 281.35000000000002

Cat No.

: SA32610

Impurities, Solifenacin

Solifenacin Hydroxyquinuclidine Impurity

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CAS No.

: 1619-34-7

Mol F.

: C7H13NO

Mol W.

: 127.18

Cat No.

: SA32615

Impurities, Solifenacin

Solifenacin Methyl Ester Impurity

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CAS No.

: 1251905-45-9

Mol F.

: C17H17NO2

Mol W.

: 267.32

Cat No.

: SA32611

Impurities, Solifenacin

Solifenacin Nitrophenyl Ester Impurity

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CAS No.

: 1229227-22-8

Mol F.

: C22H18N2O4

Mol W.

: 374.39

Cat No.

: SA32612

Impurities, Solifenacin

Solifenacin Phenyl Tetrahydroisoquinoline Impurity

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CAS No.

: 118864-75-8

Mol F.

: C15H15N

Mol W.

: 209.29

Cat No.

: SA32616

Impurities, Solifenacin

Solifenacin Succinate

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CAS No.

: 242478-38-2

Mol F.

: C27H32N2O6

Mol W.

: 480.55

Cat No.

: SA32614

Impurities, Spironolactone

Spironolactone

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CAS No.

: 52-01-7

Mol F.

: C24H32O4S

Mol W.

: 416.58

Cat No.

: SA41700

Spironolactone

Spironolactone EP Impurity A

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CAS No.

: 132458-33-4

Mol F.

: C24H30O4S

Mol W.

: 414.56

Cat No.

: SA41701

Impurities, Spironolactone

Spironolactone EP Impurity B

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CAS No.

Mol F.

: C24H31BrO4S

Mol W.

: 495.47

Cat No.

: SA41702

Impurities, Spironolactone

Spironolactone EP Impurity C

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CAS No.

: 976-70-5

Mol F.

: C22H30O3

Mol W.

: 342.47

Cat No.

: SA41703

Impurities, Spironolactone

Spironolactone EP Impurity D

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CAS No.

Mol F.

: C24H32O4S2

Mol W.

: 448.64

Cat No.

: SA41704

Impurities, Spironolactone

Spironolactone EP Impurity E

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CAS No.

: 33784-05-3

Mol F.

: C24H32O4S

Mol W.

: 416.57

Cat No.

: SA41705

Impurities, Spironolactone

Spironolactone EP Impurity F

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CAS No.

: 976-71-6

Mol F.

: C22H28O3

Mol W.

: 340.46

Cat No.

: SA41706

Impurities, Spironolactone

Spironolactone EP Impurity G

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CAS No.

: 880106-10-5

Mol F.

: C24H32O5S

Mol W.

: 432.57

Cat No.

: SA41707

Impurities, Spironolactone

Spironolactone EP Impurity H

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CAS No.

: 53866-24-3

Mol F.

: C20H26O2

Mol W.

: 298.42

Cat No.

: SA41708

Impurities, Spironolactone

Spironolactone EP Impurity I

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CAS No.

Mol F.

: C24H36O4S

Mol W.

: 420.61

Cat No.

: SA41709

Impurities, SQ109

SQ109

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CAS No.

: 502487-67-4

Mol F.

: C22H38N2

Mol W.

: 330.55

Cat No.

: SA10701

Edoxaban, Impurities

SRR-Edoxaban

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CAS No.

: 1255529-26-0

Mol F.

: C24H30ClN7O4S

Mol W.

: 548.06

Cat No.

: SA33001

Edoxaban, Impurities

SRS Boc-Cyclohexyl Diastereomer of Edoxaban

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CAS No.

: 2081883-55-6

Mol F.

: C14H27N3O3

Mol W.

: 285.39

Cat No.

: SA33021

Ezetimibe, Impurities

SRS Ezetimibe acid impurity

$450.00 25 mg

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CAS No.

: 1391053-63-6

Mol F.

: C24H23F2NO4

Mol W.

: 427.44

Cat No.

: SA14839

Fingolimod, Impurities

Stearate Amide Fingolimod Impurity

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CAS No.

: 1242271-27-7

Mol F.

: C37H67NO3

Mol W.

: 573.92999999999995

Cat No.

: SA34520

Impurities, Irganox

Stearyl 3-(3,5-Di-tert-butyl-4-hydroxyphenyl)propionate

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CAS No.

: 2082-79-3

Mol F.

: C35H62O3

Mol W.

: 530.86

Cat No.

: SA11106

Impurities, Lorcaserin

Sulfamate Lorcaserin

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CAS No.

: 1361572-46-4

Mol F.

: C11H14ClNO3S

Mol W.

: 275.75

Cat No.

: SA18808

Impurities, Sulfamethoxazole

Sulfamethoxazole EP Impurity A

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CAS No.

: 21312-10-7

Mol F.

: C12H13N3O4S

Mol W.

: 295.31

Cat No.

: SA25500

Impurities, Sulfamethoxazole

Sulfamethoxazole EP Impurity B

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CAS No.

: 135529-16-7

Mol F.

: C16H16N4O5S2

Mol W.

: 408.45

Cat No.

: SA25501

Impurities, Sulfamethoxazole

Sulfamethoxazole EP Impurity C

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CAS No.

: 1072-67-9

Mol F.

: C4H6N2O

Mol W.

: 98.1

Cat No.

: SA25502