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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 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, Telmisartan

Telmisartan

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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

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CAS No.

: 133085-87-7

Mol F.

: C16H15BrO2

Mol W.

: 319.19

Cat No.

: SA33912

Telmisartan

Telmisartan Bromo Nitrile Impurity

$195.00 1 g

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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

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CAS No.

: 114772-40-6

Mol F.

: C18H19BrO2

Mol W.

: 347.25

Cat No.

: SA33907

Impurities, Telmisartan

Telmisartan Isomer t-Butyl Ester

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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

Impurities, Terazosin

Terazosin EP Impurity K

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CAS No.

: 19237-84-4

Mol F.

: C19H21N5O4

Mol W.

: 383.4

Cat No.

: SA37311

Impurities, Terazosin

Terazosin EP Impurity L

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CAS No.

: NA

Mol F.

: C9H12N2O2

Mol W.

: 180.2

Cat No.

: SA37312

Impurities, Terazosin

Terazosin EP Impurity M

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CAS No.

: 31350-27-3

Mol F.

: C14H14N2O4

Mol W.

: 274.27

Cat No.

: SA37313

Impurities, Terazosin

Terazosin EP Impurity N

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CAS No.

: 63074-07-7

Mol F.

: C9H16N2O2

Mol W.

: 184.24

Cat No.

: SA37314

Impurities, Terazosin

Terazosin EP Impurity O

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CAS No.

: 547730-06-3

Mol F.

: C14H22N2O4

Mol W.

: 282.33999999999997

Cat No.

: SA37315

Impurities, Terbinafine

Terbinafine

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CAS No.

: 91161-71-6 (base) ; 78628-80-5 (HCl salt)

Mol F.

: C21H25N

Mol W.

: 291.43

Cat No.

: SA25723

Impurities, Terbinafine

Terbinafine Carboxy Impurity

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CAS No.

: 99473-14-0

Mol F.

: C21H23NO2

Mol W.

: 321.41

Cat No.

: SA25706

Impurities, Terbinafine

Terbinafine Carboxy Methyl Ester

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CAS No.

: 1076199-76-2

Mol F.

: C22H25NO2

Mol W.

: 335.44

Cat No.

: SA25707

Impurities, Terbinafine

Terbinafine EP Impurity C

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CAS No.

: 877265-30-0(Salt);187540-01-8(base)

Mol F.

: C21H26ClN

Mol W.

: 327.89

Cat No.

: SA25702

Impurities, Terbinafine

Terbinafine EP Impurity D

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CAS No.

: 877265-33-3(salt);151222-50-3(base)

Mol F.

: C22H28ClN

Mol W.

: 341.92

Cat No.

: SA25703

Impurities, Terbinafine

Terbinafine EP Impurity F

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CAS No.

: 926281-74-5

Mol F.

: C21H26ClN

Mol W.

: 327.89

Cat No.

: SA25705

Impurities, Terbinafine

Terbinafine N-Desmethylcarboxy Impurity

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CAS No.

: 99473-15-1

Mol F.

: C20H21NO2

Mol W.

: 307.39

Cat No.

: SA25708

Impurities, Terbinafine

Terbinafine N-oxide

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CAS No.

: NA

Mol F.

: C21H25NO

Mol W.

: 307.43

Cat No.

: SA25718

Impurities, Terbutaline

Terbutaline

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CAS No.

: 23031-32-5

Mol F.

: C12H19NO3 0.5 H2SO4

Mol W.

: 274.3

Cat No.

: SA29006

Impurities, Terbutaline

Terbutaline 3,5-Dibenzyl Ether

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CAS No.

: 28924-25-6

Mol F.

: C₂₆H₃₁NO₃

Mol W.

: 405.53

Cat No.

: SA29005

Impurities, Terbutaline

Terbutaline EP Impurity A

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CAS No.

: 99-10-5

Mol F.

: C₇H₆O₄

Mol W.

: 154.12

Cat No.

: SA29001

Impurities, Terbutaline

Terbutaline EP Impurity B

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CAS No.

: 153657-83-1(Dihydrate)

Mol F.

: C13H19NO3

Mol W.

: 237.29

Cat No.

: SA29002

Impurities, Terbutaline

Terbutaline EP Impurity C

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CAS No.

: 1246815-70-2

Mol F.

: C12H17NO3

Mol W.

: 223.27

Cat No.

: SA29003