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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, Sunitinib

Sunitinib N-Oxide

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CAS No.

: 356068-99-0

Mol F.

: C22H27FN4O3

Mol W.

: 414.47

Cat No.

: SA39609

Impurities, Sunitinib

Sunitinib N,N-Didesethyl Impurity

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CAS No.

: 1217216-61-9

Mol F.

: C18H20ClFN4O2

Mol W.

: 378.83

Cat No.

: SA39604

Impurities, Sunitinib

Sunitinib N,N-Didesethyl N-Butoxycarbonyl Impurity

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CAS No.

: 1227960-76-0

Mol F.

: C23H27FN4O4

Mol W.

: 442.48

Cat No.

: SA39603

Impurities, Sunitinib

Sunitinib N,N-Dimethyl

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CAS No.

: 326914-17-4

Mol F.

: C20H23FN4O2

Mol W.

: 370.42

Cat No.

: SA39602

Impurities, Norgestimate

syn/anti-6β-Hydroxynorgestimate

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CAS No.

: 108434-19-1

Mol F.

: C23H31NO4

Mol W.

: C23H31NO4

Cat No.

: SA15901

Impurities, Levothyroxine

T4-Formic Acid-N-methylamide

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CAS No.

: 2088032-78-2

Mol F.

: C14H9I4NO3

Mol W.

: 746.84

Cat No.

: SA24728

Impurities, Tadalafil

Tadalafil

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CAS No.

: 171596-29-5

Mol F.

: C22H19N3O4

Mol W.

: 389.4

Cat No.

: SA20900

Impurities, Tadalafil

Tadalafil Acid Impurity | CAS : 474668-76-3

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CAS No.

: 474668-76-3

Mol F.

: C19H17ClN2O4

Mol W.

: 372.81

Cat No.

: SA20916

Impurities, Tadalafil

Tadalafil Lactose Adduct

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CAS No.

: NA

Mol F.

: C34H39N3O14

Mol W.

: 713.68

Cat No.

: SA20913

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

Impurities, Tenofovir alafenamide

TAF Methyl Regio Isomer Impurity-SP

$1,995.00 100 mg

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CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42421

Impurities, Tenofovir alafenamide

TAF-PMPA-Isopropyl alaninate

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CAS No.

: 851456-00-3

Mol F.

: C15H25N6O5P

Mol W.

: 400.38

Cat No.

: SA36931

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

Impurities, Tapinarof

Tapinarof

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CAS No.

: 79338-84-4

Mol F.

: C17H18O2

Mol W.

: 254.32

Cat No.

: SA51600

Impurities, Tapinarof

Tapinarof 1,2-Diyl Dimer Impurity

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CAS No.

: NA

Mol F.

: C34H36O4

Mol W.

: 508.65

Cat No.

: SA51611

Impurities, Tapinarof

Tapinarof 1,3-Diyl Dimer Impurity

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CAS No.

: NA

Mol F.

: C34H36O4

Mol W.

: 508.65

Cat No.

: SA51612

Impurities, Tapinarof

Tapinarof Bromobenzene Impurity

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CAS No.

: 1265899-59-9

Mol F.

: C9H11BrO2

Mol W.

: 231.09

Cat No.

: SA51610

Impurities, Tapinarof

Tapinarof Dihydroxy Benzoic Acid Impurity

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CAS No.

: 1213826-92-6

Mol F.

: C10H12O4

Mol W.

: 196.20

Cat No.

: SA51601

Impurities, Tapinarof

Tapinarof Dihydroxy Benzoic Acid Impurity

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CAS No.

: 1627510-05-7

Mol F.

: C11H14O4

Mol W.

: 210.23

Cat No.

: SA51607

Impurities, Tapinarof

Tapinarof Z-Isomer

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CAS No.

: 1622988-14-0

Mol F.

: C17H18O2

Mol W.

: 254.32

Cat No.

: SA51605

Impurities, Telmisartan

Telmisartan

$99.00 100 mg

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CAS No.

: 144701-48-4

Mol F.

: C33H30N4O2

Mol W.

: 514.62

Cat No.

: SA33900

Impurities, 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

Impurities, 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

Impurities, Telmisartan

Telmisartan EP Impurity H

$195.00 1 g

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CAS No.

: 114772-40-6

Mol F.

: C18H19BrO2

Mol W.

: 347.25

Cat No.

: SA33907

Impurities, 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

Impurities, 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; (S)-PMPA

$155.00 100 mg

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CAS No.

: 147127-19-3

Mol F.

: C9H14N5O4P

Mol W.

: 287.20

Cat No.

: SA42400

Impurities, Tenofovir alafenamide

Tenofovir Alafenamide

$195.00 100 mg

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CAS No.

: 379270-37-8

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42404

Impurities, Tenofovir alafenamide

Tenofovir Alafenamide Dimer

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CAS No.

: NA

Mol F.

: C43H58N12O10P2

Mol W.

: 964.94

Cat No.

: SA36929

Impurities, Tenofovir alafenamide

Tenofovir alafenamide Impurity I

$1,995.00 100 mg

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CAS No.

: NA

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.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42415

Impurities, Tenofovir alafenamide

Tenofovir Alafenamide RRR-Diastero Isomer

$1,995.00 100 mg

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CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42416

Impurities, Tenofovir alafenamide

Tenofovir Alafenamide RSR-Diastereo Isomer

$1,995.00 100 mg

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CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42417

Impurities, Tenofovir alafenamide

Tenofovir alafenamide SRS-Diasteroisomer

$1,995.00 100 mg

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CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42418

Impurities, Tenofovir alafenamide

Tenofovir alafenamide SSR-Diastereo Isomer

$1,995.00 100 mg

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CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42419

Impurities, Tenofovir alafenamide

Tenofovir alafenamide SSS-Diasteroisomer

$1,995.00 100 mg

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CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42420

Impurities, Tenofovir

Tenofovir Diphosphate TEA

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CAS No.

: 2122333-63-3

Mol F.

: C9H16N5O10P3 : C6H15N

Mol W.

: 447.2 : 101.2

Cat No.

: SA36939