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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, 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

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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

PLEASE ENQUIRE

CAS No.

: 34245-14-2

Mol F.

: C17H26N2O2

Mol W.

: 290.4

Cat No.

: SA32906

Verapamil

Verapamil EP Impurity G

$100.00 1 g

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

Impurities, 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

Impurities, Vildagliptin

Vildagliptin IP Impurity A; Vildagliptin Impurity E; Vildagliptin Cyclo Imidamide

Please enquire for price & pack size

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CAS No.

: 1789703-37-2

Mol F.

: C17H25N3O2

Mol W.

: 303.4

Cat No.

: SA23914

Impurities, Nitrosamine, Vildagliptin

Vildagliptin N-Nitroso-L-Proline Methyl Ester

Please enquire for price & pack size

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CAS No.

: 35909-01-4

Mol F.

: C6H10N2O3

Mol W.

: 158.2

Cat No.

: SA23918

Impurities, Vildagliptin

Vildagliptin N-Oxide

Please enquire for price & pack size

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CAS No.

Mol F.

: C17H25N3O3

Mol W.

: 319.4

Cat No.

: SA23913

Impurities, Norgestimate

Z-17-Deacetylnorgestimate

Please enquire for price & pack size

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CAS No.

: 74183-54-3

Mol F.

: C21H29NO2

Mol W.

: 327.5

Cat No.

: SA15903

Impurities, Zidovudine

Zidovudine

Please enquire for price & pack size

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CAS No.

: 30516-87-1

Mol F.

: C10H13N5O4

Mol W.

: 267.24

Cat No.

: SA12603

Impurities, Zidovudine

Zidovudine EP Impurity D

$75.00 25 mg

PLEASE ENQUIRE

CAS No.

: 76-84-6

Mol F.

: C19H16O

Mol W.

: 260.33

Cat No.

: SA12606

Impurities, Zidovudine

Zidovudine EP Impurity J

Please enquire for price & pack size

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CAS No.

: 29706-84-1

Mol F.

: C29H27N5O4

Mol W.

: 509.56

Cat No.

: SA12611

Impurities, Zidovudine

Zidovudine Impurity F

$395.00 25 mg

PLEASE ENQUIRE

CAS No.

: 16053-52-4

Mol F.

: C10H14N2O5

Mol W.

: 242.23

Cat No.

: SA12609

Impurities, Zidovudine

Zidovudine USP RC D

$75.00 25 mg

PLEASE ENQUIRE

CAS No.

: 50-89-5

Mol F.

: C10H14N2O5

Mol W.

: 242.23

Cat No.

: SA12607

Impurities, Ziprasidone

Ziprasidone

Please enquire for price & pack size

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CAS No.

: 146939-27-7(Base);138982-67-9(HClSalt)

Mol F.

: C21H21ClN4OS

Mol W.

: 412.94

Cat No.

: SA32700

Impurities, Ziprasidone

Ziprasidone EP Impurity A

Please enquire for price & pack size

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CAS No.

: 87691-87-0

Mol F.

: C11H13N3S

Mol W.

: 219.31

Cat No.

: SA32701

Impurities, Ziprasidone

Ziprasidone EP Impurity B

Please enquire for price & pack size

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CAS No.

: 1159977-56-6

Mol F.

: C21H19ClN4O2S

Mol W.

: 426.92

Cat No.

: SA32702

Impurities, Ziprasidone

Ziprasidone EP Impurity C

Please enquire for price & pack size

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CAS No.

: 1159977-64-6

Mol F.

: C21H23ClN4O2S

Mol W.

: 430.95

Cat No.

: SA32703

Impurities, Ziprasidone

Ziprasidone EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C42H40Cl2N8O3S2

Mol W.

: 839.86

Cat No.

: SA32704

Impurities, Ziprasidone

Ziprasidone EP Impurity E

Please enquire for price & pack size

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CAS No.

: 1159977-04-4

Mol F.

: C28H24ClN5OS2

Mol W.

: 546.11

Cat No.

: SA32705

Impurities, Zolmitriptan

Zolmitriptan Hydroxy Ketone Analog

Please enquire for price & pack size

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CAS No.

: NA

Mol F.

: C16H21N3O4

Mol W.

: 319.4

Cat No.

: SA11911

Impurities, Zolmitriptan

Zolmitriptan USP Related Compound D

$1,555.00 100 mg

PLEASE ENQUIRE

CAS No.

: 191864-24-1

Mol F.

: C19H25N3O4

Mol W.

: 359.42

Cat No.

: SA11906