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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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Edoxaban, Impurities

SSS Boc-Cyclohexyl Diastereomer of Edoxaban

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In Stock

CAS No.

: 2081883-52-3

Mol F.

: C14H27N3O3

Mol W.

: 285.39

Cat No.

: SA33023

Edoxaban, Impurities

SSS-Edoxaban

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In Stock

CAS No.

: 1255529-27-1

Mol F.

: C24H32ClN7O4S

Mol W.

: 550.07

Cat No.

: SA33006

Impurities, Sulpiride

Sulpiride EP impurity D

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In Stock

CAS No.

: 22117-85-7

Mol F.

: C8H9NO5S

Mol W.

: 231.23

Cat No.

: SA10904

Impurities, Sumatriptan

Sumatriptan EP Impurity A

$295.00 25 mg

In Stock

CAS No.

Mol F.

: C31H43N5O6S

Mol W.

: 613.77

Cat No.

: SA34801

Impurities, Sumatriptan

Sumatriptan EP Impurity B

$455.00 25 mg

In Stock

CAS No.

: 88919-51-1

Mol F.

: C13H19N3O2S

Mol W.

: 281.37

Cat No.

: SA34802

Impurities, Sumatriptan

Sumatriptan EP Impurity C

$195.00 25 mg

In Stock

CAS No.

: 1797905-62-4

Mol F.

: C15H23N3O3S

Mol W.

: 325.43

Cat No.

: SA34803

Impurities, Sumatriptan

Sumatriptan EP Impurity D

$155.00 25 mg

In Stock

CAS No.

: 212069-94-8

Mol F.

: C14H21N3O3S

Mol W.

: 311.40

Cat No.

: SA34804

Impurities, Sumatriptan

Sumatriptan EP Impurity E

$115.00 25 mg

In Stock

CAS No.

: 88919-22-6

Mol F.

: C12H17N3O2S

Mol W.

: 267.35

Cat No.

: SA34805

Impurities, Tadalafil

Tadalafil EP Impurity A

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In Stock

CAS No.

: 171596-27-3

Mol F.

: C₂₂H₁₉N₃O₄

Mol W.

: 389.4

Cat No.

: SA20909

Tadalafil

Tadalafil EP Impurity B

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In Stock

CAS No.

: 629652-72-8

Mol F.

: C₂₂H₁₉N₃O₄

Mol W.

: 389.4

Cat No.

: SA20907

Tadalafil

Tadalafil EP Impurity C

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In Stock

CAS No.

: 171596-28-4

Mol F.

: C₂₂H₁₉N₃O₄

Mol W.

: 389.4

Cat No.

: SA20908

Impurities, Nitrosamine, Tadalafil

Tadalafil Nitroso Impurity

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In Stock

CAS No.

Mol F.

: C22H18N4O5

Mol W.

: 418.4

Cat No.

: SA20915

Impurities, Telmisartan

Telmisartan Benzimidazole Acid

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In Stock

CAS No.

: 152628-03-0

Mol F.

: C₁₂H₁₄N₂O₂

Mol W.

: 218.25

Cat No.

: SA33908

Telmisartan

Telmisartan Bromo Acid

$99.00 50 mg

In Stock

CAS No.

: 150766-86-2

Mol F.

: C14H11BrO2

Mol W.

: 289.99

Cat No.

: SA33909

Telmisartan

Telmisartan Bromo Methyl Ester

$99.00 100 mg

In Stock

CAS No.

: 114772-38-2

Mol F.

: C15H13BrO2

Mol W.

: 305.2

Cat No.

: SA33911

Telmisartan

Telmisartan DiBenzimidazole N-Desmethyl Impurity

$295.00 50 mg

In Stock

CAS No.

: 884330-09-0

Mol F.

: C18H18N4

Mol W.

: 290.15

Cat No.

: SA33918

Telmisartan

Telmisartan Dimer Impurity

$295.00 10 mg

In Stock

CAS No.

: 884330-14-7

Mol F.

: C₄₆H₃₈N₄O₄

Mol W.

: 710.82

Cat No.

: SA33920

Telmisartan

Telmisartan EP Impurity A

$125.00 100 mg

In Stock

CAS No.

: 152628-02-9

Mol F.

: C19H20N4

Mol W.

: 304.39

Cat No.

: SA33901

Telmisartan

Telmisartan EP Impurity B

$295.00 100 mg

In Stock

CAS No.

: 1026353-20-7

Mol F.

: C33H30N4O2

Mol W.

: 514.62

Cat No.

: SA33902

Telmisartan

Telmisartan EP Impurity C

$99.00 25 mg

In Stock

CAS No.

: 144702-26-1

Mol F.

: C37H38N4O2

Mol W.

: 570.72

Cat No.

: SA33903

Telmisartan

Telmisartan EP Impurity E

$99.00 25 mg

In Stock

CAS No.

: 884330-12-5

Mol F.

: C26H24N2O4

Mol W.

: 428.17

Cat No.

: SA33904

Telmisartan

Telmisartan EP Impurity F

$99.00 25 mg

In Stock

CAS No.

: 915124-86-6

Mol F.

: C33H31N5O

Mol W.

: 513.63

Cat No.

: SA33905

Telmisartan

Telmisartan EP Impurity G

$99.00 25 mg

In Stock

CAS No.

: 144702-27-2

Mol F.

: C33H29N5

Mol W.

: 495.24

Cat No.

: SA33906

Telmisartan

Telmisartan Ethyl Ester

$99.00 25 mg

In Stock

CAS No.

: 528560-94-3

Mol F.

: C35H34N4O2

Mol W.

: 542.67

Cat No.

: SA33915

Telmisartan

Telmisartan Methyl Ester

$99.00 25 mg

In Stock

CAS No.

: 528560-93-2

Mol F.

: C34H32N4O2

Mol W.

: 528.64

Cat No.

: SA33914

Telmisartan

Telmisartan N-Desmethyl Impurity

$295.00 50 mg

In Stock

CAS No.

: 144701-81-5

Mol F.

: C32H28N4O2

Mol W.

: 500.22

Cat No.

: SA33917

Tenofovir

$80.00 25 mg

In Stock

CAS No.

: 147127-20-6

Mol F.

: C9H14N5O4P

Mol W.

: 287.21

Cat No.

: SA36900

Impurities, Tenofovir

Tenofovir (R)-Isomer Monophenyl Ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 379270-35-6

Mol F.

: C15H18N5O4P

Mol W.

: 363.31

Cat No.

: SA42402

Impurities, Tenofovir

Tenofovir (R)-Propanol Impurity

$95.00 25 mg

In Stock

CAS No.

: 14047-28-0

Mol F.

: C8H11N5O

Mol W.

: 193.21

Cat No.

: SA36920

Impurities, Tenofovir

Tenofovir (s) Propanol Impurity

$95.00 25 mg

In Stock

CAS No.

: 14047-27-9

Mol F.

: C8H11N5O

Mol W.

: 193.1

Cat No.

: SA36925

Impurities, Tenofovir

Tenofovir (S)-Isomer

$100.00 25 mg

In Stock

CAS No.

: 147127-19-3

Mol F.

: C9H14N5O4P

Mol W.

: 287.21

Cat No.

: SA36917

Impurities, Tenofovir

Tenofovir (S)-Isomer Monophenyl Ester Impurity

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In Stock

CAS No.

: NA

Mol F.

: C15H18N5O4P

Mol W.

: 363.31

Cat No.

: SA42403

Impurities, Tenofovir

Tenofovir Adenine Impurity

$80.00 25 mg

In Stock

CAS No.

: 73-24-5

Mol F.

: C5H5N5

Mol W.

: 135.13

Cat No.

: SA36930

Impurities, Tenofovir

Tenofovir Alafenamide Dimer

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In Stock

CAS No.

: NA

Mol F.

: C43H58N12O10P2

Mol W.

: 964.94

Cat No.

: SA36929

Impurities, Tenofovir

Tenofovir Alafenamide Enantiomer

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In Stock

CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42405

Impurities, Tenofovir alafenamide

Tenofovir Alafenamide Impurity E

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In Stock

CAS No.

Mol F.

: C18H24N5O4P

Mol W.

: 405.39

Cat No.

: SA42411

Impurities, Tenofovir alafenamide

Tenofovir alafenamide Impurity G

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In Stock

CAS No.

: 160616-04-6

Mol F.

: C15H26N5O4P

Mol W.

: 371.38

Cat No.

: SA42412

Impurities, Tenofovir

Tenofovir Alafenamide Methyl Ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 390409-27-5

Mol F.

: C19H25N6P5O

Mol W.

: 448.16

Cat No.

: SA42406

Impurities, Tenofovir alafenamide

Tenofovir alafenamide propyl ester

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42414

Impurities, Tenofovir

Tenofovir Alafenamide Racemic D Isomer

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42408

Tenofovir

Tenofovir alafenamide undesired isomer

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In Stock

CAS No.

: 383365-04-6

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42409

Impurities, Tenofovir alafenamide

Tenofovir Anhydride Dimer

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C30H56N12O7P2

Mol W.

: 758.79

Cat No.

: SA42410

Impurities, Tenofovir

Tenofovir Desmethyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 106941-25-7

Mol F.

: C8H12N5O4P

Mol W.

: 273.19

Cat No.

: SA36934

Impurities, Tenofovir

Tenofovir Diethyl Ester (R)-Isomer

$295.00 25 mg

In Stock

CAS No.

: 180587-75-1

Mol F.

: C13H22N5O4P

Mol W.

: 343.32

Cat No.

: SA36915

Impurities, Tenofovir

Tenofovir Diethylcarbamoyl Impurity

$395.00 25 mg

In Stock

CAS No.

: 1246812-23-6

Mol F.

: C20H33N6O9P

Mol W.

: 532.48

Cat No.

: SA36916

Impurities, Tenofovir

Tenofovir Disoproxil 6N-Methoxymethyl Impurity

$395.00 25 mg

In Stock

CAS No.

: 2514954-65-3

Mol F.

: C21H34N5O11P

Mol W.

: 563.5

Cat No.

: SA36923

Impurities, Tenofovir

Tenofovir Disoproxil Desmethyl Fumarate

$295.00 25 mg

In Stock

CAS No.

: 365417-53-4; 1798422-29-3

Mol F.

: C18H28N5O10P

Mol W.

: 505.42

Cat No.

: SA36919

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity A; Tenofovir Monosoproxil

$110.00 25 mg

In Stock

CAS No.

: 211364-69-1

Mol F.

: C14H22N5O7P

Mol W.

: 403.33

Cat No.

: SA36901

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity B

$295.00 25 mg

In Stock

CAS No.

: 1246812-16-7

Mol F.

: C15H24N5O7P

Mol W.

: 417.35

Cat No.

: SA36902

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity C

$195.00 25 mg

In Stock

CAS No.

: 1246812-43-0

Mol F.

: C21H30N5O14P

Mol W.

: 491.39

Cat No.

: SA36903