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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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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

Tenofovir 9-Propenyl Impurity

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CAS No.

: 4121-39-5

Mol F.

: C8H9N5

Mol W.

: 175.2

Cat No.

: SA36941

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

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

Impurities, 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

Impurities, Tenofovir

Tenofovir Pivalic Anhydride Impurity

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CAS No.

: NA

Mol F.

Mol W.

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, Terazosin

Terazosin

$195.00 1 g

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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

$90.00 25 mg

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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

$795.00 500 mg

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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

$595.00 500 mg

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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

$895.00 1 g

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CAS No.

: 84050-21-5

Mol F.

: C15H19N5O3

Mol W.

: 317.34

Cat No.

: SA37304

Impurities, Terazosin

Terazosin EP Impurity E

$895.00 100 mg

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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

$755.00 100 mg

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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

$1,995.00 100 mg

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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

$1,995.00 100 mg

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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

$1,995.00 100 mg

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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

$1,995.00 100 mg

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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

$195.00 100 mg

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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

$125.00 100 mg

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CAS No.

: 40172-95-0

Mol F.

: C9H12N2O2

Mol W.

: 180.2

Cat No.

: SA37312

Impurities, Terazosin

Terazosin EP Impurity M

$495.00 1 g

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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

$195.00 1 g

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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

$895.00 1 g

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CAS No.

: 547730-06-3

Mol F.

: C14H22N2O4

Mol W.

: 282.34

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

Terbinafine

Terbinafine N-oxide

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CAS No.

: 2734288-05-0

Mol F.

: C21H25NO

Mol W.

: 307.43

Cat No.

: SA25718

Impurities, Terbinafine

Terbinafine Side Chain Z-Isomer Impurity

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CAS No.

: 635708-74-6

Mol F.

: C9H13Cl

Mol W.

: 156.65

Cat No.

: SA25724

Impurities, Terbutaline

Terbutaline

$195.00 1 g

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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

$895.00 1 g

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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

$225.00 1 g

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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

$1,995.00 100 mg

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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

$555.00 100 mg

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CAS No.

: 1246815-70-2

Mol F.

: C12H17NO3

Mol W.

: 223.27

Cat No.

: SA29003