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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, Simvastatin

Simvastatin Acid Methyl Ester

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CAS No.

: 145576-26-7

Mol F.

: C26H42O6

Mol W.

: 450.61

Cat No.

: SA32415

Impurities, Simvastatin

Simvastatin beta-Hydroxy Impurity

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CAS No.

: 126313-98-2

Mol F.

: C25H38O6

Mol W.

: 434.57

Cat No.

: SA32416

Impurities, Simvastatin

Simvastatin Dihydro Diol Impurity

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CAS No.

: 159143-77-8

Mol F.

: C25H40O7

Mol W.

: 452.58

Cat No.

: SA32417

Impurities, Simvastatin

Simvastatin EP Impurity A

$1,995.00 1 g

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CAS No.

: 101314-97-0

Mol F.

: C25H39NaO6

Mol W.

: 458.56

Cat No.

: SA32401

Impurities, Simvastatin

Simvastatin EP Impurity B

$1,795.00 1 g

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CAS No.

: 145576-25-6

Mol F.

: C27H40O6

Mol W.

: 460.6

Cat No.

: SA32402

Impurities, Simvastatin

Simvastatin EP Impurity C

$1,795.00 1 g

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CAS No.

: 210980-68-0

Mol F.

: C25H36O4

Mol W.

: 400.55

Cat No.

: SA32403

Impurities, Simvastatin

Simvastatin EP Impurity D

$1,995.00 100 mg

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CAS No.

: 476305-24-5

Mol F.

: C50H76O10

Mol W.

: 837.13

Cat No.

: SA32404

Impurities, Simvastatin

Simvastatin EP Impurity E

$195.00 1 g

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CAS No.

: 75330-75-5

Mol F.

: C24H36O5

Mol W.

: 404.54

Cat No.

: SA32405

Impurities, Simvastatin

Simvastatin EP Impurity F

$1,555.00 100 mg

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CAS No.

: 79952-44-6

Mol F.

: C24H36O5

Mol W.

: 404.54

Cat No.

: SA32406

Impurities, Simvastatin

Simvastatin EP Impurity G

$1,195.00 100 mg

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CAS No.

: 1449248-72-9

Mol F.

: C25H36O5

Mol W.

: 416.55

Cat No.

: SA32407

Impurities, Simvastatin

Simvastatin EP Impurity H

$1,995.00 500 mg

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CAS No.

: 79952-42-4

Mol F.

: C19H28O4

Mol W.

: 320.42

Cat No.

: SA32408

Impurities, Simvastatin

Simvastatin EP Impurity I

$1,555.00 100 mg

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CAS No.

: 79902-42-4

Mol F.

: C23H34O5

Mol W.

: 390.51

Cat No.

: SA32409

Impurities, Simvastatin

Simvastatin EP Impurity J

$1,995.00 100 mg

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CAS No.

: 864357-88-0

Mol F.

: C26H40O5

Mol W.

: 432.59

Cat No.

: SA32410

Impurities, Simvastatin

Simvastatin EP Impurity K

$1,995.00 50 mg

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CAS No.

Mol F.

: C25H40O5

Mol W.

: 420.58

Cat No.

: SA32411

Simvastatin

Simvastatin EP Impurity M

$1,555.00 100 mg

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CAS No.

: 864357-87-9

Mol F.

: C27H44O6

Mol W.

: 464.63

Cat No.

: SA32412

Simvastatin

Simvastatin EP Impurity N

$1,995.00 50 mg

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CAS No.

: 774611-54-0

Mol F.

: C26H40O5

Mol W.

: 432.59

Cat No.

: SA32413

Sitagliptin

$195.00 100 mg

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CAS No.

: 486460-32-6

Mol F.

: C16H15F6N5O

Mol W.

: 407.31

Cat No.

: SA10409

Impurities, Sitagliptin

Sitagliptin Desfluorobenzene Analog

$395.00 25 mg

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CAS No.

Mol F.

: C16H18F3N5O

Mol W.

: 353.34

Cat No.

: SA10413

Sitagliptin

Sitagliptin Impurity 28 (HCl salt)

$355.00 100 mg

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CAS No.

: 1909337-07-0

Mol F.

: C10H11ClF3NO2

Mol W.

: 269.65

Cat No.

: SA10456

Impurities, Sitagliptin

Sitagliptin N-Sulfate Sodium Salt

$795.00 25 mg

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CAS No.

: 940002-57-3(acid)

Mol F.

: C16H14F6N5NaO4S

Mol W.

: 509.36

Cat No.

: SA10426

Sitagliptin

Sitagliptin Racemate

$655.00 100 mg

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CAS No.

: 823817-56-7

Mol F.

: C16H15F6N5O

Mol W.

: 407.31

Cat No.

: SA10453

Sitagliptin

Sitagliptin Trifluorobenzoic Acid Impurity

$1,555.00 100 mg

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CAS No.

: 2428591-91-5

Mol F.

: C9H5F3O4

Mol W.

: 234.1

Cat No.

: SA10459

Impurities, Sofosbuvir

Soforbuvir (2R,3R,4R,5S) tetrahydrofuranyl Isomer

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CAS No.

Mol F.

: C22H29FN3O9P

Mol W.

: 529.45

Cat No.

: SA15446

Impurities, Sofosbuvir

Sofosbuvir

$95.00 25 mg

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CAS No.

: 1190307-88-0

Mol F.

: C22H29FN3O9P

Mol W.

: 529.46

Cat No.

: SA15401

Impurities, Sofosbuvir

Sofosbuvir 3,5 Di-O-benzoyl Nucleoside Derivative | CAS : 863329-65-1

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CAS No.

: 863329-65-1

Mol F.

: C24H21FN2O7

Mol W.

: 468.43

Cat No.

: SA15447

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15412; Sofosbuvir Impurity 3; Sofosbuvir Benzamido Impurity

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CAS No.

: 863329-62-8

Mol F.

: C31H27N3O8

Mol W.

: 569.56

Cat No.

: SA15412

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15414

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CAS No.

Mol F.

: C24H21FN2O7

Mol W.

: 468.43

Cat No.

: SA15414

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15415

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CAS No.

Mol F.

: C24H22N2O8

Mol W.

: 466.44

Cat No.

: SA15415

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15416

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CAS No.

: 1910099-17-0

Mol F.

: C24H20N2O7

Mol W.

: 448.42

Cat No.

: SA15416

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15417

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CAS No.

: 1987950-05-9

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15417

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15418; 1-β-D-Arabinofuranosyluracil-2-C-methyl

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CAS No.

: 114262-49-6

Mol F.

: C10H14N2O6

Mol W.

: 258.23

Cat No.

: SA15418

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15419

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CAS No.

: 119410-95-6

Mol F.

: C10H12N2O5

Mol W.

: 240.21

Cat No.

: SA15419

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