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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 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, 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, 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.

Mol F.

: C20H20N2O4

Mol W.

: 352.4

Cat No.

: SA44660

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, 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, 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

Carbamazepine, Impurities, Nitrosamine

N-Nitroso-5H-dibenz(b,f)azepine

$195.00 25 mg

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CAS No.

: 38652-29-8

Mol F.

: C14H10N2O

Mol W.

: 222.24

Cat No.

: SA20340

Impurities, Nitrosamine

N-Nitroso-Betahistine

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CAS No.

: 32635-81-7

Mol F.

: C8H11N3O

Mol W.

: 165.2

Cat No.

: SA44674

Impurities, Nitrosamine

N-Nitroso-betaxolol

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CAS No.

Mol F.

: C18H28N2O4

Mol W.

: 336.43

Cat No.

: SA44684

Felodipine, Impurities, Nitrosamine

N-Nitroso-Felodipine

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CAS No.

Mol F.

: C18H18Cl2N2O5

Mol W.

: 413.3

Cat No.

: SA37104

Impurities, Levofloxacin, Nitrosamine

N-Nitroso-Levofloxacin impurity

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CAS No.

: 1152314-62-9

Mol F.

: C17H17FN4O5

Mol W.

: 376.3

Cat No.

: SA44653

Impurities, Nitrosamine

N-Nitroso-Meglumine

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CAS No.

: 10356-92-0

Mol F.

: C7H16N2O6

Mol W.

: 224.21

Cat No.

: SA44677

Erythromycin, Impurities, Nitrosamine

N-Nitroso-N-Demethyl Erythromycin A

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CAS No.

: NA

Mol F.

: C36H64N2O14

Mol W.

: 748.9

Cat No.

: SA53201

Impurities, Nitrosamine, Rosuvastatin

N-Nitroso-N-Desmethyl Rosuvastatin

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CAS No.

Mol F.

: C21H25FN4O7S

Mol W.

: 496.5

Cat No.

: SA121134

Impurities, Nitrosamine, Valacyclovir

N-Nitroso-N-Ethyl Valaciclovir

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CAS No.

: NA

Mol F.

: C15H23N7O5

Mol W.

: 381.39

Cat No.

: SA49506