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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, Omeprazole

Omeprazole EP Impurity A

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CAS No.

: 37052-78-1

Mol F.

: C8H8N2OS

Mol W.

: 180.23

Cat No.

: SA19407

Impurities, Omeprazole

Omeprazole EP Impurity C

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CAS No.

: 73590-85-9

Mol F.

: C17H19N3O2S

Mol W.

: 329.42

Cat No.

: SA19409

Impurities, Omeprazole

Omeprazole EP Impurity D

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CAS No.

: 88546-55-8

Mol F.

: C17H19N3O4S

Mol W.

: 361.42

Cat No.

: SA19410

Impurities, Omeprazole

Omeprazole EP Impurity E

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CAS No.

: 176219-04-8

Mol F.

: C17H19N3O4S

Mol W.

: 361.42

Cat No.

: SA19411

Impurities, Omeprazole

Omeprazole EP Impurity F

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CAS No.

: 125656-82-8

Mol F.

: C16H13N3O2S

Mol W.

: 311.36

Cat No.

: SA19412

Impurities, Omeprazole

Omeprazole EP Impurity G

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CAS No.

: 125656-83-9

Mol F.

: C16H13N3O2S

Mol W.

: 311.36

Cat No.

: SA19413

Impurities, Omeprazole

Omeprazole EP Impurity I

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CAS No.

: 158812-85-2

Mol F.

: C17H19N3O5S

Mol W.

: 377.41

Cat No.

: SA19415

Impurities, Omeprazole

Omeprazole Hydroxymethyl Impurity

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CAS No.

: 86604-78-6

Mol F.

: C9H13NO2

Mol W.

: 167.2

Cat No.

: SA19402

Impurities, Omeprazole

Omeprazole Pyridone Acid Impurity | CAS : 1227380-90-6

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CAS No.

: 1227380-90-6

Mol F.

: C16H15N3O4

Mol W.

: 313.31

Cat No.

: SA19416

Impurities, Ondansetron

Ondansetron

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CAS No.

: 99614-01-4;103639-04-9(dihydrate)

Mol F.

: C18H19N3O

Mol W.

: 293.36

Cat No.

: SA35800

Impurities, Ondansetron

Ondansetron EP Impurity A

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CAS No.

: 153139-56-1

Mol F.

: C16H20N2O

Mol W.

: 256.33999999999997

Cat No.

: SA35801

Impurities, Ondansetron

Ondansetron EP Impurity B; Ondansetron Dimer

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CAS No.

: 1076198-52-1

Mol F.

: C37H38N6O2

Mol W.

: 598.73

Cat No.

: SA35802

Impurities, Ondansetron

Ondansetron EP Impurity C

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CAS No.

: 27387-31-1

Mol F.

: C13H13NO

Mol W.

: 199.25

Cat No.

: SA35803

Impurities, Ondansetron

Ondansetron EP Impurity D

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CAS No.

: 99614-64-9

Mol F.

: C14H13NO

Mol W.

: 211.26

Cat No.

: SA35804

Impurities, Ondansetron

Ondansetron EP Impurity E

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CAS No.

: NA

Mol F.

: C3H4N2

Mol W.

: 68.08

Cat No.

: SA35805

Impurities, Ondansetron

Ondansetron EP Impurity F

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CAS No.

: 693-98-1

Mol F.

: C4H6N2

Mol W.

: 82.1

Cat No.

: SA35806

Impurities, Ondansetron

Ondansetron EP Impurity G

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CAS No.

: 99614-03-6

Mol F.

: C17H17N3O

Mol W.

: 279.33999999999997

Cat No.

: SA35807

Donepezil, Impurities

Open-Ring Hydroxy Acid Donepezil Impurity

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CAS No.

: NA

Mol F.

: C24H31NO5

Mol W.

: 413.51

Cat No.

: SA34318

Donepezil, Impurities

Open-Ring Keto Acid Donepezil Impurity

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CAS No.

: 197010-25-6

Mol F.

: C24H28NNaO5

Mol W.

: 433.47

Cat No.

: SA34319

Impurities, Orphenadrine

Orphenadrine

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CAS No.

: 4682-36-4

Mol F.

: C18H23NO

Mol W.

: 269.38

Cat No.

: SA28300

Impurities, Orphenadrine

Orphenadrine EP Impurity A

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CAS No.

: 5472-13-9

Mol F.

: C14H14O

Mol W.

: 198.26

Cat No.

: SA28301

Impurities, Orphenadrine

Orphenadrine EP Impurity B

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CAS No.

: 131-58-8

Mol F.

: C14H12O

Mol W.

: 196.24

Cat No.

: SA28302

Impurities, Orphenadrine

Orphenadrine EP Impurity C

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CAS No.

: 17752-32-8

Mol F.

: C16H19NO

Mol W.

: 241.33

Cat No.

: SA28303

Impurities, Orphenadrine

Orphenadrine EP Impurity D

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CAS No.

: 147-24-0

Mol F.

: C17H21NO

Mol W.

: 255.35

Cat No.

: SA28304

Impurities, Orphenadrine

Orphenadrine EP Impurity E

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CAS No.

: 21945-86-8

Mol F.

: C18H23NO

Mol W.

: 269.38

Cat No.

: SA28305

Impurities, Orphenadrine

Orphenadrine EP Impurity F

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CAS No.

: 4024-34-4

Mol F.

: C18H23NO

Mol W.

: 269.38

Cat No.

: SA28306

Impurities, Orphenadrine

Orphenadrine N-Oxide

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CAS No.

: 29215-00-7

Mol F.

: C18H23NO2

Mol W.

: 285.38

Cat No.

: SA28307

Impurities, Osimertinib

Osimertinib 2-Amide impurity

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CAS No.

: 2213409-62-0

Mol F.

: C23H20FN5O2

Mol W.

: 417.4

Cat No.

: SA44710

Impurities, Osimertinib

Osimertinib Acetyl impurity

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CAS No.

: 2227103-37-7

Mol F.

: C27H33N7O2

Mol W.

: 487.6

Cat No.

: SA44709

Impurities, Osimertinib

Osimertinib Impurity N

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CAS No.

: 1932710-29-6

Mol F.

: C31H35N7O3

Mol W.

: 553.65

Cat No.

: SA44707

Impurities, Osimertinib

Osimertinib Mesylate

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CAS No.

: 1421373-66-1

Mol F.

: C29H37N7O5S

Mol W.

: 595.71

Cat No.

: SA44713

Impurities, Osimertinib

Osimertinib N-Oxide

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CAS No.

: NA

Mol F.

: C28H33N7O3

Mol W.

: 515.61

Cat No.

: SA44708

Impurities, Osimertinib

Osimertinib N,N’-Dioxide

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CAS No.

: 2411395-23-6

Mol F.

: C28H33N7O4

Mol W.

: 531.6

Cat No.

: SA44706

Impurities, Osimertinib

Osimertinib N’-Oxide

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CAS No.

: 1975982-94-5

Mol F.

: C28H33N7O3

Mol W.

: 515.61

Cat No.

: SA44711

Impurities, Raltegravir

Oxadiazole-2-carboxylic Acid Raltegravir Impurity

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CAS No.

: 19703-92-5

Mol F.

: C4H4N2O3

Mol W.

: 128.09

Cat No.

: SA25616

Cinnarizine, Impurities

Oxatomide

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CAS No.

: 60607-34-3

Mol F.

: C₂₇H₃₀N₄O

Mol W.

: 426.55

Cat No.

: SA12409

Impurities, Oxcarbazepine

Oxcarbazepine N-Sulfate

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CAS No.

: 1159977-54-4

Mol F.

: C15H12N2O5S

Mol W.

: 332.33

Cat No.

: SA12513

Impurities, Oxcarbazepine

Oxcarbazepine O-Propan-1-one

$355.00 25 mg

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CAS No.

: 186694-22-4

Mol F.

: C18H18N2O3

Mol W.

: 310.35

Cat No.

: SA12514

Flurbiprofen, Impurities

Oxime Flurbiprofen

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CAS No.

Mol F.

: C16H16FNO2

Mol W.

: 273.3

Cat No.

: SA14610

Citalopram, Impurities

Oxime Impurity of Escitalopram oxalate

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CAS No.

: 227954-88-3

Mol F.

: C20H23FN2O2

Mol W.

: 342.41

Cat No.

: SA17021

Diclofenac, Impurities

Oxindole

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CAS No.

: 59-48-3

Mol F.

: C₈H₇NO

Mol W.

: 133.15

Cat No.

: SA12710

Impurities, Indacaterol

Oxo-indacaterol

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CAS No.

: NA

Mol F.

: C24H26N2O4

Mol W.

: 406.5

Cat No.

: SA48707

Ciprofloxacin, Impurities

Oxociprofloxacin

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CAS No.

: 103237-52-1

Mol F.

: C17H16FN3O4

Mol W.

: 345.33

Cat No.

: SA42012

Impurities, Oxymetazoline

Oxymetazoline EP Impurity A

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CAS No.

: 1391053-50-1

Mol F.

: C16H27ClN2O2

Mol W.

: 314.85

Cat No.

: SA44201

Impurities, Oxymetazoline

Oxymetazoline HCl

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CAS No.

: 2315-02-8

Mol F.

: C16H25ClN2O

Mol W.

: 296.84

Cat No.

: SA44207

Impurities, Oxymetazoline

Oxymetazoline Nitroso Impurity 1

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CAS No.

: NA

Mol F.

: C16H23N3O2

Mol W.

: 289.39999999999998

Cat No.

: SA44206

Impurities, Salmeterol

P-Bromophenyl Dibenzyl Salmeterol

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CAS No.

: NA

Mol F.

: C39H48BrNO4

Mol W.

: 674.71

Cat No.

: SA10119

Impurities, Tolterodine

P-Cresol Tolterodine impurity

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CAS No.

: 106-44-5

Mol F.

: C7H8O

Mol W.

: 108.14

Cat No.

: SA28206

Ezetimibe, Impurities

P-Fluoro (R)-Oxazolidone

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CAS No.

: 404874-93-7

Mol F.

: C21H20FNO3

Mol W.

: 353.39

Cat No.

: SA14849

Impurities, Levomilnacipran

p-Hydroxy Levomilnacipran Hydrochloride

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CAS No.

: 688320-03-8

Mol F.

: C₁₅H₂₂N₂O₂•HCl

Mol W.

: 262.35

Cat No.

: SA29201