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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 Olopatadine N-Desmethyl Impurity

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CAS No.

: NA

Mol F.

: C20H20N2O4

Mol W.

: 352.4

Cat No.

: SA44625

Impurities, 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, 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

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, Varenicline

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

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

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, Valacyclovir

N-Nitroso-N-Ethyl Valaciclovir

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CAS No.

: NA

Mol F.

: C15H23N7O5

Mol W.

: 381.39

Cat No.

: SA49506

Impurities, Nitrosamine

N-Nitroso-N-isopropyl-4-aminobutyric Acid

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CAS No.

: 2624122-60-5

Mol F.

: C7H14N2O3

Mol W.

: 174.2

Cat No.

: SA44649

Impurities, Valacyclovir

N-Nitroso-N-Methyl Valaciclovir

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CAS No.

: NA

Mol F.

: C14H21N7O5

Mol W.

: 367.37

Cat No.

: SA49505

Impurities, Nitrosamine

N-Nitroso-N-methyl-4-aminobutyric Acid

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CAS No.

: 61445-55-4

Mol F.

: C5H10N2O3

Mol W.

: 146.13999999999999

Cat No.

: SA44644

Impurities, Nitrosamine

N-Nitroso-N-methylbutylamine

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CAS No.

: 7068-83-9

Mol F.

: C5H12N2O

Mol W.

: 116.16

Cat No.

: SA44646

Impurities, Nitrosamine

N-Nitroso-N-n-butyl-N-isopropylamine

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CAS No.

: 2680532-87-8

Mol F.

: C7H16N2O

Mol W.

: 144.21

Cat No.

: SA44647

Impurities, Nitrosamine

N-Nitroso-Pramipexole

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CAS No.

Mol F.

: C10H16N4OS

Mol W.

: 240.3

Cat No.

: SA44659

Impurities, Nitrosamine

N-Nitroso-Rasagiline

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CAS No.

: 2470278-90-9

Mol F.

: C12H12N2O

Mol W.

: 508.5

Cat No.

: SA44657

Impurities, Nitrosamine

N-Nitroso-Sertraline

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CAS No.

: NA

Mol F.

: C17H16Cl2N2O

Mol W.

: 335.2

Cat No.

: SA44673

Impurities, Nitrosamine

N-Nitroso-Vancomycin

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CAS No.

: 155386-25-7

Mol F.

: C66H74Cl2N10O25

Mol W.

: 1478.25

Cat No.

: SA44693

Impurities, Nitrosamine

N-Nitrosodibenzylamine

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CAS No.

: 5336-53-8

Mol F.

: C14H14N2O

Mol W.

: 226.27

Cat No.

: SA44636

Impurities, Nitrosamine

N-Nitrosodibutylamine

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CAS No.

: 924-16-3

Mol F.

: C8H18N2O

Mol W.

: 158.24

Cat No.

: SA44603

Impurities, Nitrosamine

N-Nitrosodiethanolamine

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CAS No.

: 1116-54-7

Mol F.

: C4H10N2O3

Mol W.

: 134.13

Cat No.

: SA44642

Impurities, Nitrosamine

N-Nitrosodiethylamine

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CAS No.

: 55-18-5

Mol F.

: C4H10N2O

Mol W.

: 102.13

Cat No.

: SA44643

Impurities, Nitrosamine

N-Nitrosodiisopropylamine

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CAS No.

: 601-77-4

Mol F.

: C6H14N2O

Mol W.

: 130.19

Cat No.

: SA44651

Impurities, Nitrosamine

N-Nitrosodipropylamine

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CAS No.

: 621-64-7

Mol F.

: C6H14N2O

Mol W.

: 130.19

Cat No.

: SA44650

Impurities, Nitrosamine

N-Nitrosofenfluramine

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CAS No.

: 19023-40-6

Mol F.

: C12H15F3N2O

Mol W.

: 260.26

Cat No.

: SA44638

Impurities, Nitrosamine

N-Nitrosomorpholine

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CAS No.

: 59-89-2

Mol F.

: C4H8N2O2

Mol W.

: 116.12

Cat No.

: SA44641

Impurities, Nitrosamine

N-Nitrosonadolol

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CAS No.

: 134720-06-2

Mol F.

: C17H26N2O5

Mol W.

: 338.4

Cat No.

: SA44633

Impurities, Nitrosamine

N-Nitrososarcosine

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CAS No.

: 13256-22-9

Mol F.

: C3H6N2O3

Mol W.

: 118.09

Cat No.

: SA44634

Impurities, Trimetazidine

N-Oxide Trimetazidine Impurity

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CAS No.

Mol F.

: C14H22N2O4

Mol W.

: 282.34

Cat No.

: SA35113

Impurities, Pregabalin

N-Phenyl-rac-pregabalin

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CAS No.

: NA

Mol F.

: C14H21NO2

Mol W.

: 235.32

Cat No.

: SA24817

Impurities, Sitagliptin

N-phosphate Impurity

$395.00 25 mg

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CAS No.

: 1351498-25-3

Mol F.

: C16H16F6N5O4P

Mol W.

: 487.29

Cat No.

: SA10424

Gabapentin, Impurities

N-tert-Butyloxycarbonyl Gabapentin

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CAS No.

: 227626-60-0

Mol F.

: C₁₄H₂₅NO₄

Mol W.

: 271.35000000000002

Cat No.

: SA22809

Brimonidine, Impurities

N-tert-Butyloxycarbonyl Hydroxy Brimonidine

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CAS No.

: 1391053-57-8

Mol F.

: C16H20BrN5O3

Mol W.

: 410.27

Cat No.

: SA20715