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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

N-Nitroso Frovatriptan 1

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CAS No.

Mol F.

: C14H16N4O2

Mol W.

: 272.3

Cat No.

: SA44662

Impurities, Nitrosamine

N-Nitroso Furosemide Impurity

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CAS No.

: 2708280-93-5

Mol F.

: C12H10ClN3O6S

Mol W.

: 359.74

Cat No.

: SA44681

Impurities, Nitrosamine

N-Nitroso Hydrochlorothiazide

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CAS No.

: 63779-86-2

Mol F.

: C7H7ClN4O5S2

Mol W.

: 326.73

Cat No.

: SA44632

Impurities, Nitrosamine

N-Nitroso Imatinib

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CAS No.

Mol F.

: C29H30N8O2

Mol W.

: 522.6

Cat No.

: SA44686

Impurities, Nitrosamine

N-Nitroso Imidapril

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CAS No.

Mol F.

: C20H26N4O7

Mol W.

: 434.44

Cat No.

: SA44687

Impurities, Isoproterenol, Nitrosamine

N-Nitroso Isoproterenol

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CAS No.

Mol F.

: C11H16N2O4

Mol W.

: 240.3

Cat No.

: SA25906

Impurities, Nitrosamine

N-Nitroso Labetalol

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CAS No.

: 2820170-74-7

Mol F.

: C19H23N3O4

Mol W.

: 357.4

Cat No.

: SA44688

Impurities, Lazertinib, Nitrosamine

N-Nitroso Lazertinib

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CAS No.

: NA

Mol F.

: C30H33N9O4

Mol W.

: 583.7

Cat No.

: SA53402

Impurities, Lercanidipine, Nitrosamine

N-Nitroso Lercanidipine

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CAS No.

: NA

Mol F.

: C36H40N4O7

Mol W.

: 640.7

Cat No.

: SA50918

Impurities, Linezolid, Nitrosamine

N-Nitroso Linezolid Descarbonyl Desacetamide Phthalimide (R)-Isomer

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CAS No.

: NA

Mol F.

: C21H21FN4O5

Mol W.

: 428.4

Cat No.

: SA17537

Impurities, Nitrosamine

N-Nitroso Meropenem

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CAS No.

: NA

Mol F.

: C17H24N4O6S

Mol W.

: 412.5

Cat No.

: SA44675

Impurities, Nitrosamine

N-Nitroso Methotrexate

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CAS No.

: NA

Mol F.

: C13H15N3O6

Mol W.

: 309.27

Cat No.

: SA44623

Impurities, Mirabegron, Nitrosamine

N-Nitroso Mirabegron

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CAS No.

: 3017159-61-1

Mol F.

: C21H23N5O3S

Mol W.

: 425.50

Cat No.

: SA53109

Impurities, Mirabegron, Nitrosamine

N-Nitroso Mirabegron EP Impurity B

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CAS No.

: 3032026-54-0

Mol F.

: C16H19N3O2

Mol W.

: 285.35

Cat No.

: SA53111

Impurities, Mirabegron, Nitrosamine

N-Nitroso Mirabegron EP Impurity F

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CAS No.

: 3032026-53-9

Mol F.

: C16H17N3O4

Mol W.

: 315.33

Cat No.

: SA53110

Impurities, Mirdametinib, Nitrosamine

N-Nitroso Mirdametinib

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CAS No.

: NA

Mol F.

: C16H13F3IN3O5

Mol W.

: 511.19

Cat No.

: SA53709

Impurities, Nitrosamine

N-Nitroso Mirtazapine EP Impurity D

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CAS No.

: NA

Mol F.

: C16H16N4O

Mol W.

: 280.3

Cat No.

: SA44627

Impurities, Lazertinib, Nitrosamine

N-Nitroso N-Desmethyl Lazertinib

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CAS No.

: NA

Mol F.

: C29H31N9O4

Mol W.

: 569.6

Cat No.

: SA53403

Impurities, Nitrosamine, Tetracaine

N-Nitroso N’-Oxide Tetracaine Impurity

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CAS No.

: NA

Mol F.

: C15H23N3O4

Mol W.

: 309.37

Cat No.

: SA52607

Epinephrine, Impurities, Nitrosamine

N-Nitroso Norepinephrine

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CAS No.

: NA

Mol F.

: C8H10N2O4

Mol W.

: 198.18

Cat No.

: SA46501

Impurities, Nitrosamine

N-Nitroso Olanzapine

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CAS No.

: NA

Mol F.

: C17H19N5OS

Mol W.

: 341.4

Cat No.

: SA44617

Impurities, Nitrosamine

N-Nitroso Olopatadine N-Desmethyl Impurity

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CAS No.

: NA

Mol F.

: C20H20N2O4

Mol W.

: 352.4

Cat No.

: SA44625

Impurities, Nitrosamine, Palbociclib

N-Nitroso Palbociclib 2

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CAS No.

: NA

Mol F.

: C24H28N8O3

Mol W.

: 476.53

Cat No.

: SA40424

Impurities, Nitrosamine

N-Nitroso Pramipexole

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CAS No.

Mol F.

: C10H16N4OS

Mol W.

: 240.33

Cat No.

: SA44661

Impurities, Nitrosamine, Pregabalin

N-Nitroso Pregabalin

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CAS No.

Mol F.

: C7H14N2O3

Mol W.

: 174.2

Cat No.

: SA24842

Impurities, Nitrosamine, Pregabalin

N-Nitroso Pregabalin Impurity 48

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CAS No.

: 29882-69-7

Mol F.

: C8H10N2O

Mol W.

: 150.18

Cat No.

: SA24841

Impurities, Nitrosamine

N-Nitroso Promethazine Impurity

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CAS No.

: 94511-44-1

Mol F.

: C16H17N3OS

Mol W.

: 299.39

Cat No.

: SA44689

Impurities, Nitrosamine

N-Nitroso Propafenone

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CAS No.

Mol F.

: C21H26N2O4

Mol W.

: 370.44

Cat No.

: SA44658

Impurities, Nitrosamine

N-Nitroso Rabeprazole

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CAS No.

: NA

Mol F.

: C18H20N4O4S

Mol W.

: 388.4

Cat No.

: SA446121

Impurities, Nitrosamine

N-Nitroso Rabeprazole EP Impurity F

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CAS No.

: NA

Mol F.

: C7H5N3OS

Mol W.

: 179.2

Cat No.

: SA446119

Impurities, Nitrosamine

N-Nitroso Rabeprazole Sulfide

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CAS No.

: NA

Mol F.

: C18H20N4O3S

Mol W.

: 372.44

Cat No.

: SA446120

Impurities, Nitrosamine, Risdiplam

N-Nitroso Risdiplam Impurity

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CAS No.

: NA

Mol F.

: C22H22N8O2

Mol W.

: 430.46

Cat No.

: SA52312

Impurities, Nitrosamine

N-Nitroso Ritonavir

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CAS No.

Mol F.

: C8H13N3OS

Mol W.

: 199.27

Cat No.

: SA44694

Impurities, Nitrosamine

N-Nitroso Rivastigmine

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CAS No.

Mol F.

: C13H19N3O3

Mol W.

: 265.31

Cat No.

: SA44690

Impurities, Nitrosamine, Rizatriptan

N-Nitroso Rizatriptan

$1,555.00 100 mg

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CAS No.

: NA

Mol F.

: C15H18N6O

Mol W.

: 298.4

Cat No.

: SA52711

Impurities, Ruxolitinib

N-Nitroso Ruxolitinib

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CAS No.

Mol F.

: C17H17N7O

Mol W.

: 335.37

Cat No.

: SA43403

Impurities, Nitrosamine

N-Nitroso Silodosin

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CAS No.

Mol F.

: C25H31F3N4O5

Mol W.

: 524.53

Cat No.

: SA44691

Impurities, Nitrosamine

N-Nitroso Tamsulosin Impurity

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CAS No.

: 2892260-31-8

Mol F.

: C20H27N3O6S

Mol W.

: 437.5

Cat No.

: SA44672

Impurities, Nitrosamine

N-Nitroso Temocapril

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CAS No.

: NA

Mol F.

: C23H27N3O6S2

Mol W.

: 505.6

Cat No.

: SA44629

Impurities, Nitrosamine, Terazosin

N-Nitroso Terazosin EP Impurity N

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CAS No.

: 2470438-57-2

Mol F.

: C9H15N3O3

Mol W.

: 213.2

Cat No.

: SA37316

Impurities, Nitrosamine, Terbinafine

N-Nitroso Terbinafine Side Chain Impurity

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CAS No.

: NA

Mol F.

: C10H16N2O

Mol W.

: 180.25

Cat No.

: SA446106

Impurities, Nitrosamine

N-Nitroso Teriflunomide Impurity

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CAS No.

: NA

Mol F.

: C12H8F3N3O3

Mol W.

: 299.21

Cat No.

: SA446122

Impurities, Nitrosamine

N-Nitroso Tert Butyl Amine

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CAS No.

: 744965-41-1

Mol F.

: C4H10N2O

Mol W.

: 102.14

Cat No.

: SA446125

Impurities, Nitrosamine, Tetracaine

N-Nitroso Tetracaine EP Impurity B

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CAS No.

: NA

Mol F.

: C11H14N2O3

Mol W.

: 222.24

Cat No.

: SA52605

Impurities, Nitrosamine, Tetracaine

N-Nitroso Tetracaine EP Impurity C

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CAS No.

: NA

Mol F.

: C12H16N2O3

Mol W.

: 236.27

Cat No.

: SA52606

Impurities, Nitrosamine, Trazodone

N-Nitroso Trazodone EP Impurity L

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CAS No.

: 2219339-13-4

Mol F.

: C10H12ClN3O

Mol W.

: 225.7

Cat No.

: SA30315

Impurities, Nitrosamine

N-Nitroso Trimebutine EP Impurity E

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CAS No.

: NA

Mol F.

: C21H26N2O6

Mol W.

: 402.4

Cat No.

: SA44670

Impurities, Nitrosamine

N-Nitroso Varenicline

$295.00 50 mg

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CAS No.

: 2755871-02-2

Mol F.

: C13H12N4O

Mol W.

: 240.27

Cat No.

: SA44652

Impurities, Nitrosamine, Venlafaxine

N-Nitroso Venlafaxine EP Impurity D

$455.00 100 mg

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CAS No.

: 2680662-11-5

Mol F.

: C16H24N2O3

Mol W.

: 292.4

Cat No.

: SA22741

Impurities, Nitrosamine

N-Nitroso Voglibose

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CAS No.

: NA

Mol F.

: C10H20N2O8

Mol W.

: 296.3

Cat No.

: SA44669

Impurities

Impurities, Nitrosamine

N-Nitroso Frovatriptan 1

CAS No.

Mol F.

: C14H16N4O2

Mol W.

: 272.3

Cat No.

: SA44662

Impurities, Nitrosamine

N-Nitroso Furosemide Impurity

CAS No.

: 2708280-93-5

Mol F.

: C12H10ClN3O6S

Mol W.

: 359.74

Cat No.

: SA44681

Impurities, Nitrosamine

N-​Nitroso Hydrochlorothiazide

CAS No.

: 63779-86-2

Mol F.

: C7H7ClN4O5S2

Mol W.

: 326.73

Cat No.

: SA44632

Impurities, Nitrosamine

N-Nitroso Imatinib

CAS No.

Mol F.

: C29H30N8O2

Mol W.

: 522.6

Cat No.

: SA44686

Impurities, Nitrosamine

N-Nitroso Imidapril

CAS No.

Mol F.

: C20H26N4O7

Mol W.

: 434.44

Cat No.

: SA44687

Impurities, Isoproterenol, Nitrosamine

N-Nitroso Isoproterenol

CAS No.

Mol F.

: C11H16N2O4

Mol W.

: 240.3

Cat No.

: SA25906

Impurities, Nitrosamine

N-Nitroso Labetalol

CAS No.

: 2820170-74-7

Mol F.

: C19H23N3O4

Mol W.

: 357.4

Cat No.

: SA44688

Impurities, Lazertinib, Nitrosamine

N-Nitroso Lazertinib

CAS No.

: NA

Mol F.

: C30H33N9O4

Mol W.

: 583.7

Cat No.

: SA53402

Impurities, Lercanidipine, Nitrosamine

N-Nitroso Lercanidipine

CAS No.

N-Nitroso Hydrochlorothiazide