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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, Valsartan

Valsartan EP Impurity B

$655.00 500 mg

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CAS No.

: 137863-20-8

Mol F.

: C30H33N5O3

Mol W.

: 511.61

Cat No.

: SA33309

Impurities, Valsartan

Valsartan EP Impurity C

$655.00 500 mg

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CAS No.

: 952652-79-8

Mol F.

: C23H27N5O3

Mol W.

: 421.49

Cat No.

: SA33308

Impurities, Valsartan

Valsartan EPImpurity E

$155.00 100 mg

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CAS No.

: 137863-17-3

Mol F.

: C24H29N5O3

Mol W.

: 435.52

Cat No.

: SA33310

Impurities, Valsartan

Valsartan N-Propanoyl Analog impurity

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CAS No.

: 1332623-79-6

Mol F.

: C22H25N5O3

Mol W.

: 407.5

Cat No.

: SA33322

Impurities, Valsartan

Valsartan Nitrile Impurity

$995.00 500 mg

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CAS No.

: 443093-86-5

Mol F.

: C24H28N2O3

Mol W.

: 392.49

Cat No.

: SA33314

Impurities, Varenicline

Varenicline

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CAS No.

: 249296-44-4

Mol F.

: C13H13N3

Mol W.

: 211.26

Cat No.

: SA39500

Impurities, Varenicline

Varenicline Dioxo Impurity

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CAS No.

: 357424-07-8

Mol F.

: C13H13N3O2

Mol W.

: 243.26

Cat No.

: SA39506

Impurities, Varenicline

Varenicline Hydroxy Impurity

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CAS No.

: 357424-21-6

Mol F.

: C13H13N3O

Mol W.

: 227.26

Cat No.

: SA39507

Impurities, Varenicline

Varenicline Lactam

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CAS No.

: 873302-30-8

Mol F.

: CƒHNƒO

Mol W.

: 225.25

Cat No.

: SA39501

Impurities, Varenicline

Varenicline meta-Dinitro Impurity

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CAS No.

: 853946-18-6

Mol F.

: C13H10F3N3O5

Mol W.

: 345.23

Cat No.

: SA39508

Impurities, Varenicline

Varenicline N-Formyl Impurity

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CAS No.

: 796865-82-2

Mol F.

: C„HƒNƒO

Mol W.

: 239.27

Cat No.

: SA39505

Impurities, Varenicline

Varenicline N-Trifluoroacetyl Impurity

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CAS No.

: 230615-70-0

Mol F.

: C…H‚FƒNƒO

Mol W.

: 307.27

Cat No.

: SA39504

Impurities, Varenicline

Varenicline ortho-Diamino Impurity

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CAS No.

: 230615-69-7

Mol F.

: CƒH„FƒNƒO

Mol W.

: 285.26

Cat No.

: SA39503

Impurities, Varenicline

Varenicline ortho-Dinitro

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CAS No.

: 230615-59-5

Mol F.

: CƒH€FƒNƒO…

Mol W.

: 345.23

Cat No.

: SA39502

Impurities, Venlafaxine

Venlafaxine Acetamide Impurity

$1,555.00 100 mg

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CAS No.

: 295366-48-2

Mol F.

: C17H25NO3

Mol W.

: 291.39

Cat No.

: SA22735

Impurities, Venlafaxine

Venlafaxine Desmethoxy

$395.00 25 mg

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CAS No.

: 93413-82-2

Mol F.

: C16H26ClNO

Mol W.

: 283.84

Cat No.

: SA22706

Impurities, Venlafaxine

Venlafaxine N-Dimer

$2,555.00 100 mg

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CAS No.

Mol F.

: C34H52N2O4

Mol W.

: 552.79

Cat No.

: SA22720

Impurities, Venlafaxine

Venlafaxine O-Desmethyl R-Isomer

$395.00 25 mg

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CAS No.

: 142761-11-3

Mol F.

: C16H25NO2

Mol W.

: 263.38

Cat No.

: SA22716

Impurities, Venlafaxine

Venlafaxine O-Desmethyl S-Isomer

$395.00 25 mg

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CAS No.

: 142761-12-4

Mol F.

: C16H25NO2

Mol W.

: 263.38

Cat No.

: SA22717

Impurities, Venlafaxine

Venlafaxine R-Isomer

$395.00 25 mg

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CAS No.

: 93413-46-8

Mol F.

: C17H27NO2

Mol W.

: 277.4

Cat No.

: SA22718

Impurities, Venlafaxine

Venlafaxine S-Isomer

$395.00 25 mg

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CAS No.

: 93413-44-6

Mol F.

: C17H27NO2

Mol W.

: 277.4

Cat No.

: SA22719

Verapamil

$150.00 1 g

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CAS No.

: 52-53-9

Mol F.

: C27H38N2O4

Mol W.

: 454.6

Cat No.

: SA32900

Verapamil

Verapamil EP Impurity A

$995.00 1 g

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CAS No.

: 63434-11-7

Mol F.

: C25H38N2O4

Mol W.

: 430.58

Cat No.

: SA32901

Verapamil

Verapamil EP Impurity B

$195.00 1 g

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CAS No.

: 3490-06-0

Mol F.

: C11H17NO2

Mol W.

: 195.26

Cat No.

: SA32902

Verapamil

Verapamil EP Impurity C

$555.00 1 g

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CAS No.

: 51012-67-0

Mol F.

: C12H19NO2

Mol W.

: 209.28

Cat No.

: SA32903

Verapamil

Verapamil EP Impurity D

$655.00 1 g

PLEASE ENQUIRE

CAS No.

: 36770-74-8

Mol F.

: C14H22ClNO2

Mol W.

: 271.78

Cat No.

: SA32904

Verapamil

Verapamil EP Impurity E

$100.00 1 g

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CAS No.

: 93-03-8

Mol F.

: C9H12O3

Mol W.

: 168.19

Cat No.

: SA32905

Verapamil

Verapamil Ep Impurity F

$1,555.00 500 mg

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CAS No.

: 34245-14-2

Mol F.

: C17H26N2O2

Mol W.

: 290.4

Cat No.

: SA32906

Verapamil

Verapamil EP Impurity G

$100.00 1 g

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CAS No.

: 120-14-9

Mol F.

: C9H10O3

Mol W.

: 166.17

Cat No.

: SA32907

Verapamil

Verapamil EP Impurity H

$1,995.00 250 mg

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CAS No.

: 190850-49-8

Mol F.

: C26H36N2O4

Mol W.

: 440.57

Cat No.

: SA32908

Verapamil

Verapamil EP Impurity I

$1,795.00 250 mg

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CAS No.

: 2893-91-6

Mol F.

: C₂₆H₃₇ClN₂O₄

Mol W.

: 440.57

Cat No.

: SA32909

Verapamil

Verapamil EP Impurity J

$795.00 100 mg

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CAS No.

: 67018-85-3

Mol F.

: C26H36N2O4

Mol W.

: 440.57

Cat No.

: SA32910

Verapamil

Verapamil EP Impurity K

$155.00 100 mg

PLEASE ENQUIRE

CAS No.

: 20850-49-1

Mol F.

: C13H17NO2

Mol W.

: 219.28

Cat No.

: SA32911

Verapamil

Verapamil EP Impurity L

$355.00 1 g

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CAS No.

: 14046-55-0

Mol F.

: C12H16O3

Mol W.

: 208.25

Cat No.

: SA32912

Verapamil

Verapamil EP Impurity M

$995.00 100 mg

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CAS No.

: 190850-50-1

Mol F.

: C42H57N3O6

Mol W.

: 699.92

Cat No.

: SA32913

Verapamil

Verapamil EP Impurity N

$795.00 100 mg

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CAS No.

: 2086274-75-9

Mol F.

: C33H47N3O4

Mol W.

: 549.74

Cat No.

: SA32914

Verapamil

Verapamil EP Impurity O

$1,995.00 250 mg

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CAS No.

: 959011-16-6

Mol F.

: C27H38N2O4

Mol W.

: 454.6

Cat No.

: SA32915

Verapamil

Verapamil EP Impurity P

$1,995.00 100 mg

PLEASE ENQUIRE

CAS No.

: 2086275-13-8

Mol F.

: C29H38N2O4

Mol W.

: 478.62

Cat No.

: SA32916

Impurities, Vericiguat

Vericiguat

Please enquire for price & pack size

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CAS No.

: 1350653-20-1

Mol F.

: C19H16F2N8O2

Mol W.

: 426.4

Cat No.

: SA50700

Impurities, Vericiguat

Vericiguat Acetyl Impurity

Please enquire for price & pack size

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CAS No.

Mol F.

: C19H16F2N8O

Mol W.

: 410.4

Cat No.

: SA50702

Impurities, Vericiguat

Vericiguat Carboxidamide Hydrochloride Impurity

Please enquire for price & pack size

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CAS No.

: 1426309-48-9 (HCl Salt)

Mol F.

: C14H12ClF2N5

Mol W.

: 323.73

Cat No.

: SA50708

Impurities, Vericiguat

Vericiguat Carboxylic Acid Impurity

Please enquire for price & pack size

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CAS No.

: 2135333-04-7

Mol F.

: C14H9F2N3O2

Mol W.

: 289.24

Cat No.

: SA50709

Impurities, Vericiguat

Vericiguat N-Glucuronide

Please enquire for price & pack size

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CAS No.

: 2112745-90-9

Mol F.

: C25H24F2N8O8

Mol W.

: 602.5

Cat No.

: SA50706

Impurities, Vericiguat

Vericiguat Nitrile Impurity

Please enquire for price & pack size

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CAS No.

: 1350653-26-7

Mol F.

: C14H8F2N4

Mol W.

: 270.24

Cat No.

: SA50710

Impurities, Vildagliptin

Vildagliptin

Please enquire for price & pack size

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CAS No.

: 274901-16-5

Mol F.

: C₁₇H₂₅N₃O₂

Mol W.

: 303.39999999999998

Cat No.

: SA23905

Impurities, Vildagliptin

Vildagliptin Carboxylic Acid Impurity

Please enquire for price & pack size

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CAS No.

: 565453-40-9

Mol F.

: C17H26N2O4

Mol W.

: 322.4

Cat No.

: SA23917

Impurities, Vildagliptin

Vildagliptin Carboxylic Acid Methyl Ester

Please enquire for price & pack size

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CAS No.

: 948574-56-9

Mol F.

: C18H28N2O4

Mol W.

: 336.43

Cat No.

: SA23904

Impurities, Vildagliptin

Vildagliptin Chloroacetyl Amide (R)-Isomer

Please enquire for price & pack size

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CAS No.

Mol F.

: C7H11ClN2O2

Mol W.

: 190.63

Cat No.

: SA23902

Vildagliptin

Vildagliptin Dione Impurity

Please enquire for price & pack size

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CAS No.

: 1789703-36-1;1844894-70-7

Mol F.

: C17H24N2O3

Mol W.

: 304.38

Cat No.

: SA23909

Impurities, Vildagliptin

Vildagliptin Imine Impurity

Please enquire for price & pack size

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CAS No.

: 1710765-32-4

Mol F.

: C17H25N3O2

Mol W.

: 303.39999999999998

Cat No.

: SA23910