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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, Nicardipine

Nicardipine O-Desmethyl

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CAS No.

: 123973-71-7

Mol F.

: C25H25N3O6

Mol W.

: 463.48

Cat No.

: SA36207

Impurities, Nicotine

Nicotine

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CAS No.

: 54-11-5

Mol F.

: C10H14N2

Mol W.

: 162.23

Cat No.

: SA32200

Impurities, Nicotine

Nicotine EP Impurity G

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CAS No.

: 494-52-0(Base);15251-47-5(Salt)

Mol F.

: C10H14N2

Mol W.

: 162.23

Cat No.

: SA32207

Impurities, Nilotinib

Nilotinib

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CAS No.

: 641571-10-0

Mol F.

: C28H22F3N7O

Mol W.

: 529.52

Cat No.

: SA40600

Impurities, Nilotinib

Nilotinib 2-Pyridinyl Impurity

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CAS No.

: 66521-65-1

Mol F.

: C9H8N4

Mol W.

: 172.19

Cat No.

: SA40607

Impurities, Nilotinib

Nilotinib 3-Pyridinyl Impurity

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CAS No.

: 66521-66-2

Mol F.

: C9H8N4

Mol W.

: 173.19

Cat No.

: SA40608

Impurities, Nilotinib

Nilotinib Amide Impurity

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CAS No.

: 851137-91-2

Mol F.

: C17H15N5O

Mol W.

: 305.33

Cat No.

: SA40601

Impurities, Nilotinib

Nilotinib Amino Impurity

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CAS No.

: 641571-11-1

Mol F.

: C11H10F3N3

Mol W.

: 241.21

Cat No.

: SA40609

Impurities, Nilotinib

Nilotinib Bromo Impurity

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CAS No.

: 54962-75-3

Mol F.

: C‡H…BrFƒN

Mol W.

: 240.02

Cat No.

: SA40610

Impurities, Nilotinib

Nilotinib Carboxylic Acid Impurity

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CAS No.

: 641569-94-0

Mol F.

: C17H14N4O2

Mol W.

: 306.32

Cat No.

: SA40606

Impurities, Nilotinib

Nilotinib EP Impurity E; Desmethylimidazole Nilotinib Impurity

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CAS No.

: 2119583-26-3

Mol F.

: C27H20F3N7O

Mol W.

: 515.5

Cat No.

: SA40612

Impurities, Nilotinib

Nilotinib EP Impurity H; Nilotinib Regio Isomer Impurity

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CAS No.

: 641571-15-5

Mol F.

: C28H22F3N7O

Mol W.

: 529.52

Cat No.

: SA40611

Impurities, Nilotinib

Nilotinib Ethylimidazole Analog

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CAS No.

: 21195813-24-1

Mol F.

: C29H24F3N7O

Mol W.

: 543.54

Cat No.

: SA40602

Impurities, Nilotinib

Nilotinib Formyl Impurity

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CAS No.

: NA

Mol F.

: C17H14N4O

Mol W.

: 290.32

Cat No.

: SA40603

Impurities, Nilotinib

Nilotinib Iodo Impurity

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CAS No.

: 926922-18-1

Mol F.

: C‰H‚DƒFƒINƒO

Mol W.

: 488.26

Cat No.

: SA40604

Impurities, Nilotinib

Nilotinib Pyridine N-Oxide

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CAS No.

: 1246817-85-5

Mol F.

: C28H22F3N7O2

Mol W.

: 545.52

Cat No.

: SA40605

Impurities, Nintedanib

Nintedanib

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CAS No.

: 656247-17-5

Mol F.

: C₃₁H₃₃N₅O₄

Mol W.

: 539.62

Cat No.

: SA22503

Impurities, Nintedanib

Nintedanib Dimethyl Impurity

$195.00 25 mg

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CAS No.

: NA

Mol F.

: C15H24N4O

Mol W.

: 276.38

Cat No.

: SA22502

Impurities, Nintedanib

Nintedanib Esylate Impurity B

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CAS No.

: NA

Mol F.

: C32H35N5O4

Mol W.

: 553.65

Cat No.

: SA22533

Impurities, Nintedanib

Nintedanib Esylate Impurity C | CAS : 2519501-85-8

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CAS No.

: 519501-85-8

Mol F.

: C23H18N2O4

Mol W.

: 386.40

Cat No.

: SA22534

Impurities, Nintedanib

Nintedanib Esylate Impurity E | CAS : 2380229-45-6

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CAS No.

: 2380229-45-6

Mol F.

: C33H35N5O5

Mol W.

: 581.66

Cat No.

: SA22535

Impurities, Nintedanib

Nintedanib Ethoxy Enolindole

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CAS No.

: 656247-19-7

Mol F.

: C19H17NO4

Mol W.

: 323.3

Cat No.

: SA22522

Impurities, Nintedanib

Nintedanib ethyl ester impurity

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CAS No.

Mol F.

: C32H35N5O4

Mol W.

: 553.66

Cat No.

: SA22523

Impurities, Nintedanib

Nintedanib N-Acyl Ethoxy Enolindole

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CAS No.

: 1175365-43-1

Mol F.

: C21H19NO5

Mol W.

: 365.38

Cat No.

: SA22526

Impurities, Nintedanib

Nintedanib N-Acyl Oxindole

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CAS No.

: 676326-36-6

Mol F.

: C12H11NO4

Mol W.

: 233.22

Cat No.

: SA22524

Impurities, Nintedanib

Nintedanib N-Acyl-4-carboxylate

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CAS No.

: NA

Mol F.

: C12H11NO4

Mol W.

: 233.22

Cat No.

: SA22536

Impurities, Nintedanib

Nintedanib N, N-Dimethyl Amine

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CAS No.

: 2454314-41-9

Mol F.

: C19H18N2O3

Mol W.

: 322.4

Cat No.

: SA22521

Impurities, Nintedanib, Nitrosamine

Nintedanib Nitroso Impurity 1

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CAS No.

Mol F.

: C31H32N6O5

Mol W.

: 568.62

Cat No.

: SA22530

Impurities, Nintedanib

Nintedanib Piperazinyl N’- oxide

$245.00 25 mg

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CAS No.

Mol F.

: C31H35N5O5

Mol W.

: 557.64

Cat No.

: SA22528

Impurities, Niraparib

Niraparib carboxylic acid metabolite M1

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CAS No.

: 1476777-06-6

Mol F.

: C19H19N3O2

Mol W.

: 321.37

Cat No.

: SA50601

Impurities, Niraparib

Niraparib HCl

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CAS No.

: 1038915-64-8

Mol F.

: C19H21ClN4O

Mol W.

: 356.85

Cat No.

: SA50600

Impurities, Niraparib

Niraparib Impurity B

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CAS No.

Mol F.

: C24H28N4O3

Mol W.

: 420.5

Cat No.

: SA50602

Impurities, Niraparib

Niraparib Impurity E

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CAS No.

Mol F.

: C19H18N4O

Mol W.

: 318.37

Cat No.

: SA50603

Impurities, Nirmatrelvir

Nirmatrelvir

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CAS No.

: 2628280-40-8

Mol F.

: C23H32F3N5O4

Mol W.

: 499.5

Cat No.

: SA46900

Impurities, Nirmatrelvir

Nirmatrelvir Impurity A

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CAS No.

: 2628280-48-6

Mol F.

: C7H14ClN3O2

Mol W.

: 207.66

Cat No.

: SA46901

Impurities, Nirmatrelvir

Nirmatrelvir Impurity B

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CAS No.

: 2755812-81-6

Mol F.

: C23H34F3N5O5

Mol W.

: 517.6

Cat No.

: SA46902

Impurities, Nirmatrelvir

Nirmatrelvir R-isomer(CN) Impurity

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CAS No.

: 2755812-41-8

Mol F.

: C23H32F3N5O4

Mol W.

: 499.5

Cat No.

: SA46903

Impurities, Lenalidomide

Nitrobenzoate Lenalidomide Impurity

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CAS No.

: 1628915-10-5

Mol F.

: C9H9NO5

Mol W.

: 211.17

Cat No.

: SA34104

Impurities, Nitrofurantoin

Nitrofurantoin

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CAS No.

: 67-20-9

Mol F.

: C8H6N4O5

Mol W.

: 238.16

Cat No.

: SA39800

Impurities, Nitrofurantoin

Nitrofurantoin 4-Hydroxy Impurity

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CAS No.

: 76644-41-2

Mol F.

: C8H6N4O6

Mol W.

: 254.16

Cat No.

: SA39801

Impurities, Nitrofurantoin

Nitrofurantoin 5-Methyl Impurity

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CAS No.

: 3668-93-7

Mol F.

: C9H8N4O5

Mol W.

: 252.18

Cat No.

: SA39802

Impurities, Nitrofurantoin

Nitrofurantoin USP Related Compound A

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CAS No.

: 63981-22-6

Mol F.

: C8H8N4O6

Mol W.

: 256.17

Cat No.

: SA39803

Impurities, Nitrofurantoin

Nitrofurate

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CAS No.

: 645-12-5

Mol F.

: C5H3NO5

Mol W.

: 157.08

Cat No.

: SA39804

Impurities, Nitrofurantoin

Nitrofurazone

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CAS No.

: 59-87-0

Mol F.

: C†H†N„O„

Mol W.

: 198.14

Cat No.

: SA39808

Impurities, Nitrosamine

Nitrosamine impurity for Torsemide

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CAS No.

: NA

Mol F.

: C16H19N5O4S

Mol W.

: 277.12

Cat No.

: SA44612

Atorvastatin, Impurities, Nitrosamine

Nitrosamine impurity of Atorvastatin Calcium

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CAS No.

: NA

Mol F.

: C33H34FN3O6

Mol W.

: 587.64

Cat No.

: SA44613

Carvedilol, Impurities

Nitroso Carvedilol

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CAS No.

Mol F.

: C24H25N3O5

Mol W.

: 435.5

Cat No.

: SA31721

Impurities, Nizatidine

Nizatidine

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CAS No.

: 76963-41-2

Mol F.

: C12H21N5O2S2

Mol W.

: 331.46

Cat No.

: SA34400

Impurities, Nizatidine

Nizatidine EP Impurity A

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CAS No.

: 54252-45-8

Mol F.

: C4H9N3O2

Mol W.

: 131.13

Cat No.

: SA34401

Impurities, Nizatidine

Nizatidine EP Impurity B

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CAS No.

: 61832-41-5

Mol F.

: C4H8N2O2S

Mol W.

: 148.18

Cat No.

: SA34402