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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, Tadalafil

Tadalafil N-Hydroxy Methyl impurity

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CAS No.

: NA

Mol F.

: C23H21N3O5

Mol W.

: 419.43

Cat No.

: SA20912

Impurities, Tadalafil

Tadalafil β D-Glucuronide

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CAS No.

: NA

Mol F.

: C28H29N3O9

Mol W.

: 551.54

Cat No.

: SA20914

Tenofovir alafenamide

TAF Methyl Regio Isomer Impurity-SP

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42421

Impurities, Tenofovir

TAF-PMPA-Isopropyl alaninate

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CAS No.

: 851456-00-3

Mol F.

: C15H25N6O5P

Mol W.

: 400.38

Cat No.

: SA36931

Impurities, Tenofovir alafenamide

TAF-RRR-Diastero Isomer

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42416

Impurities, Tenofovir alafenamide

TAF-RSR-Diastereo Isomer

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42417

Impurities, Tenofovir alafenamide

TAF-SRS-Diasteroisomer

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42418

Impurities, Tenofovir alafenamide

TAF-SSR-Diastereo Isomer

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42419

Impurities, Tenofovir alafenamide

TAF-SSS-Diasteroisomer

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42420

Impurities, Tamoxifen

Tamoxifen

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CAS No.

: 10540-29-1

Mol F.

: C26H29NO

Mol W.

: 371.51

Cat No.

: SA35500

Impurities, Tamoxifen

Tamoxifen (E)-Isomer; Cis-Tamoxifen

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CAS No.

: 13002-65-8

Mol F.

: C26H29NO

Mol W.

: 371.51

Cat No.

: SA35501

Impurities, Tamoxifen

Tamoxifen Amine Dimer

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CAS No.

: 1346606-51-6

Mol F.

: C49H49NO2

Mol W.

: 683.92

Cat No.

: SA35509

Impurities, Tamoxifen

Tamoxifen Citrate

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CAS No.

: 54965-24-1

Mol F.

: C32H37NO8

Mol W.

: 563.64

Cat No.

: SA35510

Impurities, Tamoxifen

Tamoxifen Des Ethyl Impurity

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CAS No.

: 19957-51-8

Mol F.

: C24H25NO

Mol W.

: 343.46

Cat No.

: SA35503

Impurities, Tamoxifen

Tamoxifen EP Impurity H

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CAS No.

: 809285-09-4

Mol F.

: C43H48N2O2

Mol W.

: 624.85

Cat No.

: SA35508

Impurities, Tamoxifen

Tamoxifen Hydroxyl Impurity

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CAS No.

: 748-97-0

Mol F.

: C26H31NO2

Mol W.

: 389.53

Cat No.

: SA35502

Impurities, Tamoxifen

Tamoxifen Keto Impurity

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CAS No.

: 68047-07-4

Mol F.

: C20H25NO2

Mol W.

: 311.42

Cat No.

: SA35507

Impurities, Tamoxifen

Tamoxifen Methyl Impurity

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CAS No.

: 197251-11-9;31750-45-5

Mol F.

: C25H27NO

Mol W.

: 357.49

Cat No.

: SA35504

Impurities, Tamoxifen

Tamoxifen N-Oxide

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CAS No.

: 75504-34-6

Mol F.

: C26H29NO2

Mol W.

: 387.51

Cat No.

: SA35512

Impurities, Tamoxifen

Tamoxifen N,N-Didesmethyl Impurity

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CAS No.

: 80234-20-4

Mol F.

: C24H25NO

Mol W.

: 343.46

Cat No.

: SA35511

Impurities, Tamoxifen

Tamoxifen Ortho Impurity

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CAS No.

: NA

Mol F.

: C26H29NO

Mol W.

: 371.51

Cat No.

: SA35505

Telmisartan

$99.00 100 mg

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CAS No.

: 144701-48-4

Mol F.

: C33H30N4O2

Mol W.

: 514.62

Cat No.

: SA33900

Telmisartan

Telmisartan Bromo Ethyl Ester

$995.00 1 g

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CAS No.

: 133085-87-7

Mol F.

: C16H15BrO2

Mol W.

: 319.19

Cat No.

: SA33912

Telmisartan

Telmisartan Bromo Nitrile Impurity

$99.00 100 mg

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CAS No.

: 114772-54-2

Mol F.

: C14H10BrN

Mol W.

: 272.14

Cat No.

: SA33913

Telmisartan

Telmisartan EP Impurity H

$995.00 1 g

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CAS No.

: 114772-40-6

Mol F.

: C18H19BrO2

Mol W.

: 347.25

Cat No.

: SA33907

Telmisartan

Telmisartan Impurity J | CAS:885045-90-9

$1,555.00 100 mg

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CAS No.

: 885045-90-9

Mol F.

: C33H29ClN4O2

Mol W.

: 549.06

Cat No.

: SA33921

Telmisartan

Telmisartan Isomer t-Butyl Ester

$1,555.00 1 g

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CAS No.

: 1026438-56-1

Mol F.

: C37H38N4O2

Mol W.

: 570.72

Cat No.

: SA33916

Dacarbazine, Impurities

Temozolomide Acid

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CAS No.

: 113942-30-6

Mol F.

: C6H5N5O3

Mol W.

: 195.14

Cat No.

: SA38806

Impurities, Tenofovir

Tenofovir (S)-Isomer

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CAS No.

: 147127-19-3

Mol F.

: C9H14N5O4P

Mol W.

: 287.20

Cat No.

: SA42400

Impurities, Tenofovir

Tenofovir Alafenamide

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CAS No.

: 379270-37-8

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42404

Impurities, Tenofovir

Tenofovir Alafenamide

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CAS No.

: 379270-37-8

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA36918

Impurities, Tenofovir

Tenofovir alafenamide fumarate racemic D-isomer

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CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA36928

Impurities, Tenofovir alafenamide

Tenofovir alafenamide Impurity I

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CAS No.

Mol F.

: C12H22N7O5P

Mol W.

: 375.33

Cat No.

: SA42413

Impurities, Tenofovir alafenamide

Tenofovir alafenamide propyl ester-RRS- Isomer

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42415

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate

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CAS No.

: 202138-50-9

Mol F.

: C23H34N5O14P

Mol W.

: 635.51

Cat No.

: SA36924

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity F

$550.00 25 mg

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CAS No.

Mol F.

: C29H42N10Na2O14P2

Mol W.

: 862.63

Cat No.

: SA36906

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity I

$695.00 25 mg

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CAS No.

: 1093279-77-6

Mol F.

: C34H52N10O17P2

Mol W.

: 934.78

Cat No.

: SA36909

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity L

$495.00 25 mg

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CAS No.

Mol F.

: C18H29N6O9P

Mol W.

: 504.43

Cat No.

: SA36912

Impurities, Tenofovir

TENOFOVIR ENANTIOMER SRR-ISOMER

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA36926

Impurities, Terazosin

Terazosin

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CAS No.

: 63590-64-7

Mol F.

: C19H25N5O4

Mol W.

: 387.43

Cat No.

: SA37300

Impurities, Terazosin

Terazosin EP Impurity A

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CAS No.

: 23680-84-4

Mol F.

: C10H10ClN3O2

Mol W.

: 239.66

Cat No.

: SA37301

Impurities, Terazosin

Terazosin EP Impurity B

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CAS No.

: 1177261-73-2

Mol F.

: C19H24N4O5

Mol W.

: 388.42

Cat No.

: SA37302

Impurities, Terazosin

Terazosin EP Impurity C

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CAS No.

: 60547-97-9

Mol F.

: C14H19N5O2

Mol W.

: 289.33

Cat No.

: SA37303

Impurities, Terazosin

Terazosin EP Impurity D

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CAS No.

: 84050-21-5

Mol F.

: C15H19N5O3

Mol W.

: 317.33999999999997

Cat No.

: SA37304

Impurities, Terazosin

Terazosin EP Impurity E

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CAS No.

: 102839-00-9(Base);104965-50-6(HClSalt)

Mol F.

: C24H28N8O4

Mol W.

: 492.53

Cat No.

: SA37305

Impurities, Terazosin

Terazosin EP Impurity F

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CAS No.

: 109678-71-9

Mol F.

: C19H27N5O4

Mol W.

: 389.45

Cat No.

: SA37306

Impurities, Terazosin

Terazosin EP Impurity G

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CAS No.

: 105356-89-6

Mol F.

: C18H23N5O4

Mol W.

: 373.41

Cat No.

: SA37307

Impurities, Terazosin

Terazosin EP Impurity H

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CAS No.

: 105356-90-9

Mol F.

: C18H23N5O4

Mol W.

: 373.41

Cat No.

: SA37308

Impurities, Terazosin

Terazosin EP Impurity I

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CAS No.

: 1177261-85-6

Mol F.

: C20H27N5O4

Mol W.

: 401.46

Cat No.

: SA37309

Impurities, Terazosin

Terazosin EP Impurity J

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CAS No.

: 152551-75-2

Mol F.

: C19H27N5O4

Mol W.

: 389.45

Cat No.

: SA37310