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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, 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, Tamsulosin

Tamsulosin

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CAS No.

: 106133-20-4

Mol F.

: C20H28N2O5S

Mol W.

: 408.5

Cat No.

: SA77900

Impurities, Tapentadol

Tapentadol Hydrochloride

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CAS No.

: 175591-09-0

Mol F.

: C14H23NO : HCl

Mol W.

: 221.3 : 36.5

Cat No.

: SA78000

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, Tazarotene

Tazarotene

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CAS No.

: 118292-40-3

Mol F.

: C21H21NO2S

Mol W.

: 351.5

Cat No.

: SA78100

Impurities, Tazobactam

Tazobactam

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CAS No.

: 89786-04-9

Mol F.

: C10H12N4O5S

Mol W.

: 300.3

Cat No.

: SA78200

Impurities, Tegoprazan

Tegoprazan

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CAS No.

: 942195-55-3

Mol F.

: C20H19F2N3O3

Mol W.

: 387.4

Cat No.

: SA78300

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 Dimer Methyl Ester Impurity

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CAS No.

: 884330-13-6

Mol F.

: C48H42N4O4

Mol W.

: 738.9

Cat No.

: SA33922

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

Impurities, Temozolomide

Temozolomide

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CAS No.

: 85622-93-1

Mol F.

: C6H6N6O2

Mol W.

: 194.2

Cat No.

: SA78400

Dacarbazine, Impurities

Temozolomide Acid

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CAS No.

: 113942-30-6

Mol F.

: C6H5N5O3

Mol W.

: 195.14

Cat No.

: SA38806

Impurities, Teneligliptin

Teneligliptin

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CAS No.

: 760937-92-6

Mol F.

: C22H30N6OS

Mol W.

: 426.6

Cat No.

: SA78500

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

Tenofovir 9-Propenyl Impurity

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CAS No.

: 4121-39-5

Mol F.

: C8H9N5

Mol W.

: 175.2

Cat No.

: SA36941

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 Carboxylic Acid Impurity

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CAS No.

: 1234081-04-9

Mol F.

: C18H23N6O5P

Mol W.

: 434.4

Cat No.

: SA42422

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

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate

$155.00 100 mg

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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; Tenofovir Mono POC Dimer

$550.00 25 mg

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CAS No.

: 1962114-92-6

Mol F.

: C29H42N10Na2O14P2

Mol W.

: 862.63

Cat No.

: SA36906

Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity I; Tri-POC Tenofovir Dimer

$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; Dimethylaminocarboxymethyl POC Tenofovir

$275.00 10 mg

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CAS No.

Mol F.

: C18H29N6O9P

Mol W.

: 504.43

Cat No.

: SA36912

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate USP Related Compound J

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CAS No.

: 1246812-23-6

Mol F.

: C21H34N5O9P

Mol W.

: 531.50

Cat No.

: SA36936

Tenofovir

Tenofovir Pivalic Anhydride Impurity

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CAS No.

: NA

Mol F.

: C24H30N5O9P

Mol W.

: 563.50

Cat No.

: SA36938

Impurities, Tenofovir

Tenofovir Pivalic Anhydride Impurity (R-Phosphate)

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CAS No.

: NA

Mol F.

: C20H26N5O5P : C4H4O4

Mol W.

: 447.4 : 116.1

Cat No.

: SA36937

Impurities, Tenoxicam

Tenoxicam

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CAS No.

: 59804-37-4

Mol F.

: C13H11N3O4S2

Mol W.

: 337.4

Cat No.

: SA78600

Impurities, Terazosin

Terazosin

$195.00 1 g

PLEASE ENQUIRE

CAS No.

: 63590-64-7

Mol F.

: C19H25N5O4

Mol W.

: 387.43

Cat No.

: SA37300