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Impurities

SynThink is a producer and supplier of a number of pharmaceutical Reference Standards (Impurity Standards) which are required for pharmaceutical companies to study quality, stability and biological safety of pharmaceutical products. Many API Impurities are available in our stock.

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Impurities, Sitagliptin

Sitagliptin Ketoamide Impurity

$80.00 25 mg

In Stock

CAS No.

: 764667-65-4

Mol F.

: C16H12F6N4O2

Mol W.

: 406.28

Cat No.

: SA10403

Impurities, Sitagliptin

Sitagliptin Oxo-Impurity

$495.00 25 mg

In Stock

CAS No.

Mol F.

: C16H13F6N5O2

Mol W.

: 421.3

Cat No.

: SA10415

Impurities, Sitagliptin

Sitagliptin S-Isomer

$250.00 25 mg

In Stock

CAS No.

: 823817-58-9 (Phosphate); 823817-55-6

Mol F.

: C16H15F6N5O

Mol W.

: 407.31

Cat No.

: SA10401

Impurities, Sitagliptin

Sitagliptin Styrylacetyl Analog

Please enquire for price & pack size

In Stock

CAS No.

: 1675201-14-5; 1803026-58-5

Mol F.

: C16H12F6N4O

Mol W.

: 390.28

Cat No.

: SA10404

Impurities, Sitagliptin

Sitagliptin Tablets EP Impurity FP-D; Sitagliptin Phenyl Crotonyl Impurity; Enone SLP

$195.00 25 mg

In Stock

CAS No.

: 1253056-18-6

Mol F.

: C16H2F6N4O

Mol W.

: 390.28

Cat No.

: SA10421

Impurities, Sitagliptin

Sitagliptin Triazecine Impurity

$595.00 25 mg

In Stock

CAS No.

: 2088771-61-1

Mol F.

: C16H13F6N5O2

Mol W.

: 421.3

Cat No.

: SA10422

Impurities, Sofosbuvir

Sofosbuvir 3′-O-Phosphoramidate

$255.00 10 mg

In Stock

CAS No.

: 1337482-15-1

Mol F.

: C22H29FN3O9P

Mol W.

: 529.45

Cat No.

: SA15408

Impurities, Sofosbuvir

Sofosbuvir 3′,5′-Bis-O-Phosphoramidate

$195.00 10 mg

In Stock

CAS No.

: 1337482-17-3

Mol F.

: C34H45FN4O13P2

Mol W.

: 798.69

Cat No.

: SA15407

Impurities, Sofosbuvir

Sofosbuvir Chloro Analog; Chloro Sofosbuvir

$495.00 10 mg

In Stock

CAS No.

: 1496552-51-2

Mol F.

: C22H29ClN3O9P

Mol W.

: 545.13

Cat No.

: SA15420

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15413; 2′-Alkene tribenzoyl cytidine

$395.00 25 mg

In Stock

CAS No.

: 863329-63-9

Mol F.

: C31H25N3O7

Mol W.

: 551.55

Cat No.

: SA15413

Impurities, Sofosbuvir

Sofosbuvir impurity SA15432

$100.00 100 mg

In Stock

CAS No.

: 863329-66-2

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15432

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15434; Sofosbuvir metabolites

$395.00 10 mg

In Stock

CAS No.

: 1859162-80-3

Mol F.

: C16H18FN2O8P

Mol W.

: 416.29

Cat No.

: SA15434

Impurities, Sofosbuvir

Sofosbuvir Impurity SA15435

$695.00 25 mg

In Stock

CAS No.

Mol F.

: C31H26ClN3O7

Mol W.

: 588.01

Cat No.

: SA15435

Impurities, Sofosbuvir

Sofosbuvir α-isomer

$255.00 10 mg

In Stock

CAS No.

Mol F.

: C22H29FN3O9P

Mol W.

: 529.46

Cat No.

: SA15402

Edoxaban, Impurities

SRR Boc-Cyclohexyl Enantiomer of Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 2089454-69-1

Mol F.

: C14H27N3O3

Mol W.

: 285.38

Cat No.

: SA33017

Ezetimibe, Impurities

SRR uncyclized ezetimibe impurity

$250.00 25 mg

In Stock

CAS No.

: 1621715-63-6

Mol F.

: C33H30F2N2O5

Mol W.

: 572.6

Cat No.

: SA14838

Ezetimibe, Impurities

SS-Ezetimibe Ketone

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C24H19F2NO3

Mol W.

: 407.41

Cat No.

: SA14857

Edoxaban, Impurities

SSR Boc-Cyclohexyl Diastereomer of Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 2081883-50-1

Mol F.

: C14H27N3O3

Mol W.

: 285.39

Cat No.

: SA33022

Edoxaban, Impurities

SSR-Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 1255529-28-2

Mol F.

: C25H31ClN6O4S

Mol W.

: 547.07

Cat No.

: SA33002

Edoxaban, Impurities

SSS Boc-Cyclohexyl Diastereomer of Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 2081883-52-3

Mol F.

: C14H27N3O3

Mol W.

: 285.39

Cat No.

: SA33023

Edoxaban, Impurities

SSS-Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 1255529-27-1

Mol F.

: C24H32ClN7O4S

Mol W.

: 550.07

Cat No.

: SA33006

Impurities, Sulpiride

Sulpiride EP impurity D

Please enquire for price & pack size

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, Tadalafil

Tadalafil EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 171596-27-3

Mol F.

: C₂₂H₁₉N₃O₄

Mol W.

: 389.4

Cat No.

: SA20909

Impurities, Tadalafil

Tadalafil EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 629652-72-8

Mol F.

: C₂₂H₁₉N₃O₄

Mol W.

: 389.4

Cat No.

: SA20907

Impurities, Tadalafil

Tadalafil EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 171596-28-4

Mol F.

: C₂₂H₁₉N₃O₄

Mol W.

: 389.4

Cat No.

: SA20908

Impurities, Tadalafil

Tadalafil Nitroso Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C22H18N4O5

Mol W.

: 418.4

Cat No.

: SA20915

Impurities, Telmisartan

Telmisartan Benzimidazole Acid

Please enquire for price & pack size

In Stock

CAS No.

: 152628-03-0

Mol F.

: C₁₂H₁₄N₂O₂

Mol W.

: 218.25

Cat No.

: SA33908

Impurities, Telmisartan

Telmisartan Bromo Acid

Please enquire for price & pack size

In Stock

CAS No.

: 150766-86-2

Mol F.

: C14H11BrO2

Mol W.

: 289.99

Cat No.

: SA33909

Impurities, Telmisartan

Telmisartan Bromo Methyl Ester

Please enquire for price & pack size

In Stock

CAS No.

: 114772-38-2

Mol F.

: C15H13BrO2

Mol W.

: 304

Cat No.

: SA33911

Impurities, Telmisartan

Telmisartan DiBenzimidazole N-Desmethyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 884330-09-0

Mol F.

: C18H18N4

Mol W.

: 290.14999999999998

Cat No.

: SA33918

Impurities, Telmisartan

Telmisartan EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 152628-02-9

Mol F.

: C19H20N4

Mol W.

: 304.39

Cat No.

: SA33901

Impurities, Telmisartan

Telmisartan EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1026353-20-7

Mol F.

: C33H30N4O2

Mol W.

: 514.6

Cat No.

: Imp00001

Impurities, Telmisartan

Telmisartan EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 144702-26-1

Mol F.

: C37H38N4O2

Mol W.

: 570.72

Cat No.

: SA33903

Impurities, Telmisartan

Telmisartan EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 884330-12-5

Mol F.

: C26H24N2O4

Mol W.

: 428.17

Cat No.

: SA33904

Impurities, Telmisartan

Telmisartan EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 915124-86-6

Mol F.

: C33H31N5O

Mol W.

: 513.63

Cat No.

: SA33905

Impurities, Telmisartan

Telmisartan EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 144702-27-2

Mol F.

: C33H29N5

Mol W.

: 495.24

Cat No.

: SA33906

Impurities, Telmisartan

Telmisartan Ethyl Ester

Please enquire for price & pack size

In Stock

CAS No.

: 528560-94-3

Mol F.

: C35H34N4O2

Mol W.

: 542.66999999999996

Cat No.

: SA33915

Impurities, Telmisartan

Telmisartan Methyl Ester

Please enquire for price & pack size

In Stock

CAS No.

: 528560-93-2

Mol F.

: C34H32N4O2

Mol W.

: 528.64

Cat No.

: SA33914

Impurities, Tenofovir

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

Please enquire for price & pack size

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

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C43H58N12O10P2

Mol W.

: 964.94

Cat No.

: SA36929