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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, Nitrosamine, Rizatriptan

N-Nitroso desmethyl Rizatriptan Impurity

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In Stock

CAS No.

: NA

Mol F.

: C14H16N6O

Mol W.

: 284.32

Cat No.

: SA446111

Colesevelam, Impurities, Nitrosamine

N-Nitroso Didecylamine

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In Stock

CAS No.

: 69112-95-4

Mol F.

: C20H42N2O

Mol W.

: 326.56

Cat No.

: SA10217

Diltiazem, Impurities, Nitrosamine

N-Nitroso Diltiazem EP Impurity G

$195.00 25 mg

In Stock

CAS No.

Mol F.

: C21H23N3O5S

Mol W.

: 429.49

Cat No.

: SA19531

Impurities, Nitrosamine

N-Nitroso Dobutamine

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In Stock

CAS No.

Mol F.

: C18H22N2O4

Mol W.

: 330.38

Cat No.

: SA446100

Dorzolamide, Impurities, Nitrosamine

N-Nitroso Dorzolamide

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In Stock

CAS No.

Mol F.

: C10H15N3O5S3

Mol W.

: 353.44

Cat No.

: SA24121

Duloxetine, Impurities

N-Nitroso Duloxetine

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In Stock

CAS No.

Mol F.

: C18H18N2O2S

Mol W.

: 326.41

Cat No.

: SA36317

Edoxaban, Impurities, Nitrosamine

N-Nitroso Edoxaban Desmethyl Impurity

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In Stock

CAS No.

: NA

Mol F.

: C23H27ClN8O5S

Mol W.

: 563

Cat No.

: SA33040

ENALAPRIL, Impurities, Nitrosamine

N-Nitroso Enalapril

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In Stock

CAS No.

: NA

Mol F.

: C20H27N3O6

Mol W.

: 405.5

Cat No.

: SA44616

Escitalopram, Impurities, Nitrosamine

N-Nitroso Escitalopram Impurity

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In Stock

CAS No.

Mol F.

: C19H18FN3O2

Mol W.

: 339.36

Cat No.

: SA21217

Impurities, Nitrosamine

N-Nitroso Ethyl Methyl Amine

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In Stock

CAS No.

: 10595-95-6

Mol F.

: C3H8N2O

Mol W.

: 88.11

Cat No.

: SA446105

Hydrochlorothiazide, Impurities, Nitrosamine

N-Nitroso Hydrochlorothiazide

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In Stock

CAS No.

: 63779-86-2

Mol F.

: C7H7ClN4O5S2

Mol W.

: 326.74

Cat No.

: SA11208

Impurities, Isavuconazole

N-Nitroso Isavuconazonium

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In Stock

CAS No.

Mol F.

: C35H34F2N9O6S+

Mol W.

: 746.76

Cat No.

: SA44127

Impurities, Nitrosamine

N-Nitroso Levalbuterol

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In Stock

CAS No.

: 2919946-71-5

Mol F.

: C13H20N2O4

Mol W.

: 268.3

Cat No.

: SA26020

Impurities, Lisinopril, Nitrosamine

N-Nitroso Lisinopril

$145.00 25 mg

In Stock

CAS No.

: 519175-80-5

Mol F.

: C21H30N4O6

Mol W.

: 434.49

Cat No.

: SA35712

Impurities, Metoprolol, Nitrosamine

N-Nitroso Metoprolol

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In Stock

CAS No.

: 138768-62-4

Mol F.

: C15H24N2O4

Mol W.

: 296.36

Cat No.

: SA41424

Impurities, Moxifloxacin, Nitrosamine

N-Nitroso Moxifloxacin

$145.00 25 mg

In Stock

CAS No.

Mol F.

: C21H23FN4O5

Mol W.

: 430.43

Cat No.

: SA30720

Impurities, Nitrosamine, Terbinafine

N-Nitroso N-Desmethyl Terbinafine

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In Stock

CAS No.

: NA

Mol F.

: C20H22N2O

Mol W.

: 306.39

Cat No.

: SA44626

Impurities, Nitrosamine

N-Nitroso Nordoxepin

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In Stock

CAS No.

Mol F.

: C18H18N2O2

Mol W.

: 294.4

Cat No.

: SA44656

Impurities, Nitrosamine, Nortriptyline

N-Nitroso Nortriptyline

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In Stock

CAS No.

: 55855-42-0

Mol F.

: C19H20N2O

Mol W.

: 292.37

Cat No.

: SA50401

Bupropion, Impurities

N-Nitroso of 4-Fluoro Bupropion

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In Stock

CAS No.

Mol F.

: C13H17FN2O2

Mol W.

: 252.28

Cat No.

: SA12245

Impurities, Palbociclib

N-Nitroso Palbociclib 1

$145.00 25 mg

In Stock

CAS No.

Mol F.

: C24H28N8O3

Mol W.

: 476.53

Cat No.

: SA40426

Impurities, Nitrosamine, Paliperidone

N-Nitroso Paliperidone; 6-Fluoro-3-(1-nitrosopiperidin-4- yl)benzo[d]isoxazole

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In Stock

CAS No.

: 2416230-38-9

Mol F.

: C12H12FN3O2

Mol W.

: 249.24

Cat No.

: SA44614

Impurities, Nitrosamine, Paroxetine

N-Nitroso paroxetine Impurity

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In Stock

CAS No.

: 2361294-43-9

Mol F.

: C19H19FN2O4

Mol W.

: 358.4

Cat No.

: SA18317

Impurities, Nitrosamine

N-Nitroso Phenylephrine

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In Stock

CAS No.

: 78658-64-7

Mol F.

: C9H12N2O3

Mol W.

: 196.2

Cat No.

: SA44664

Impurities, Nitrosamine, Propranolol

N-Nitroso Propranolol

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In Stock

CAS No.

: 84418-35-9

Mol F.

: C16H20N2O3

Mol W.

: 288.34

Cat No.

: SA24617

Impurities, Nitrosamine

N-Nitroso Quinapril

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In Stock

CAS No.

Mol F.

: C25H29N3O6

Mol W.

: 467.51

Cat No.

: SA44698

Impurities, Nitrosamine, Ramipril

N-Nitroso Ramipril (Mixture of isomers)

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In Stock

CAS No.

Mol F.

: C23H31N3O6

Mol W.

: 445.51

Cat No.

: SA31318

Impurities, Rivaroxaban

N-Nitroso Rivaroxaban Impurity B

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In Stock

CAS No.

Mol F.

: C19H19ClN4O7S

Mol W.

: 482.89

Cat No.

: SA18630

Impurities, Rivaroxaban

N-Nitroso Rivaroxaban Impurity G

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In Stock

CAS No.

Mol F.

: C18H19ClN4O5S

Mol W.

: 438.89

Cat No.

: SA18631

Impurities, Salmeterol

N-Nitroso Salmeterol

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In Stock

CAS No.

: 3036581-81-1

Mol F.

: C25H36N2O5

Mol W.

: 444.56

Cat No.

: SA10111

Impurities, Nitrosamine

N-Nitroso Sildenafil

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In Stock

CAS No.

Mol F.

: C22H29N7O5S

Mol W.

: 503.57

Cat No.

: SA44699

Impurities, Nitrosamine, Sitagliptin

N-Nitroso Sitagliptin Impurity

$125.00 25 mg

In Stock

CAS No.

: 2892260-32-9

Mol F.

: C6H6F3N5O

Mol W.

: 221.1

Cat No.

: SA10452

Impurities, Nitrosamine, Terbinafine

N-Nitroso Terbinafine EP Impurity A

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In Stock

CAS No.

: 296760-88-8

Mol F.

: C12H12N2O

Mol W.

: 200.2

Cat No.

: SA44621

Impurities, Nitrosamine, Tetracaine

N-Nitroso Tetracaine | CAS : 3038740-94-9

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In Stock

CAS No.

: 3038740-94-9

Mol F.

: C15H23N3O3

Mol W.

: 293.37

Cat No.

: SA446109

Impurities, Trimetazidine

N-Nitroso Trimetazidine

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In Stock

CAS No.

: 92432-50-3

Mol F.

: C14H21N3O4

Mol W.

: 295.33

Cat No.

: SA35114

Impurities, Nitrosamine, Venlafaxine

N-Nitroso Venlafaxine Impurity E

$295.00 50 mg

In Stock

CAS No.

Mol F.

: C16H22N2O3

Mol W.

: 290.36

Cat No.

: SA22739

Impurities, Nitrosamine, Venlafaxine

N-Nitroso Venlafaxine Impurity F

$295.00 50 mg

In Stock

CAS No.

Mol F.

: C16H22N2O2

Mol W.

: 274.36

Cat No.

: SA22738

Impurities, Nitrosamine, Venlafaxine

N-Nitroso Venlafaxine Impurity H

$355.00 50 mg

In Stock

CAS No.

Mol F.

: C24H32N2O4

Mol W.

: 412.52

Cat No.

: SA22740

Impurities, Nitrosamine, Vildagliptin

N-Nitroso Vildagliptin

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In Stock

CAS No.

Mol F.

: C17H24N4O3

Mol W.

: 332.4

Cat No.

: SA23921

Impurities, Nitrosamine, Vildagliptin

N-Nitroso Vildagliptin Amide Analog

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In Stock

CAS No.

: NA

Mol F.

: C17H26N4O4

Mol W.

: 350.41

Cat No.

: SA23920

Impurities, Nitrosamine

N-Nitroso-Ambroxol

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In Stock

CAS No.

: NA

Mol F.

: C13H17Br2N3O2

Mol W.

: 407.1

Cat No.

: SA44676

Atomoxetine, Impurities, Nitrosamine

N-Nitroso-Atomoxetine

$155.00 25 mg

In Stock

CAS No.

Mol F.

: C17H20N2O2

Mol W.

: 284.4

Cat No.

: SA22123

Bisoprolol, Impurities, Nitrosamine

N-Nitroso-Bisoprolol

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In Stock

CAS No.

Mol F.

: C18H30N2O5

Mol W.

: 354.4

Cat No.

: SA35619

Impurities, Nitrosamine, Zolmitriptan

N-Nitroso-N-Desmethyl Zolmitriptan

$195.00 25 mg

In Stock

CAS No.

: NA

Mol F.

: C15H18N4O3

Mol W.

: 302.33

Cat No.

: SA11908

Impurities, Nintedanib, Nitrosamine

N-Nitroso-N-Desmethylnintedanib

$295.00 25 mg

In Stock

CAS No.

Mol F.

: C30H30N6O5

Mol W.

: 554.6

Cat No.

: SA22529

Impurities, Nitrosamine

N-Nitroso-N-Ethyl piperazine

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In Stock

CAS No.

: 65504-33-8

Mol F.

: C6H13N3O

Mol W.

: 143.2

Cat No.

: SA44666

Impurities, Nebivolol, Nitrosamine

N-Nitroso-Nebivolol

Please enquire for price & pack size

In Stock

CAS No.

: 1391051-68-5

Mol F.

: C22H24F2N2O5

Mol W.

: 434.4

Cat No.

: SA14710

Impurities, Nitrosamine, Salbutamol

N-Nitroso-salbutamol

Please enquire for price & pack size

In Stock

CAS No.

: 2919946-71-5

Mol F.

: C13H20N2O4

Mol W.

: 268.31

Cat No.

: SA26019

Impurities, Nitrosamine, Sumatriptan

N-Nitroso–N-desmethyl sumatriptan

Please enquire for price & pack size

In Stock

CAS No.

: 3036581-86-6

Mol F.

: C13H18N4O3S

Mol W.

: 310.37

Cat No.

: SA34818

Impurities, Nitrosamine

N-Nitrosodimethylamine

Please enquire for price & pack size

In Stock

CAS No.

: 62-75-9

Mol F.

: C2H6N2O

Mol W.

: 74.08

Cat No.

: SA44601