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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, Levomilnacipran

p-Hydroxy-Levomilnacipran Carbamoyl-β-D-glucuronide

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CAS No.

: NA

Mol F.

: C₂₂H₃₀N₂O₁₀

Mol W.

: 482.48

Cat No.

: SA29202

Ezetimibe, Impurities

P-Methyl oxazolidone

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CAS No.

Mol F.

: C21H21NO4

Mol W.

: 351.39

Cat No.

: SA14844

Ezetimibe, Impurities

p-Tolyl Keto Pentanoic Acid | CAS : 833-85-2

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CAS No.

: 833-85-2

Mol F.

: C12H14O3

Mol W.

: 206.24

Cat No.

: SA14861

Impurities, Palbociclib

Palbociclib

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CAS No.

: 571190-30-2

Mol F.

: C24H29N7O2

Mol W.

: 447.53

Cat No.

: SA40400

Impurities, Palbociclib

Palbociclib 2-Hydroxy Acetyl Impurity

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CAS No.

: 2172256-78-7

Mol F.

: C15H17N3O3

Mol W.

: 287.3

Cat No.

: SA40430

Impurities, Palbociclib

Palbociclib 7A Regio-Isomer Impurity

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CAS No.

: 1941177-47-4

Mol F.

: C33H45N7O4

Mol W.

: 603.75

Cat No.

: SA40442

Impurities, Palbociclib

Palbociclib Des Acetyl N-Oxide

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CAS No.

Mol F.

: C22H27N7O2

Mol W.

: 421.5

Cat No.

: SA40440

Impurities, Palbociclib

Palbociclib Impurity 93

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CAS No.

: 2410426-60-5

Mol F.

: C22H30BrN5O3

Mol W.

: 492.41

Cat No.

: SA40441

Impurities, Palbociclib

Palbociclib Maleic Acid Adduct

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CAS No.

Mol F.

: C28H31N7O5

Mol W.

: 545.6

Cat No.

: SA40443

Impurities, Palbociclib

Palbociclib N-Acetic Acid

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CAS No.

: 2363160-84-1

Mol F.

: C22H24N6O4

Mol W.

: 505.57

Cat No.

: SA40402

Impurities, Palbociclib

Palbociclib Nitroso Piperazine Amine

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CAS No.

Mol F.

: C9H13N5O

Mol W.

: 207.23

Cat No.

: SA40438

Impurities, Palbociclib

Palbociclib Sulfate Sodium Salt

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CAS No.

: NA

Mol F.

: C24H28N7NaO5S

Mol W.

: 549.58

Cat No.

: SA40403

Impurities, Paliperidone

Paliperidone

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CAS No.

: 144598-75-4

Mol F.

: C23H27FN4O3

Mol W.

: 426.2

Cat No.

: SA49200

Impurities, Paliperidone

Paliperidone Hydroxybenzoyl Derivative | CAS : 152542-03-5

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CAS No.

: 152542-03-5

Mol F.

: C23H28FN3O4

Mol W.

: 429.5

Cat No.

: SA49207

Impurities, Paliperidone

Paliperidone Ketone Impurity | CAS : 1189516-65-1

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CAS No.

: 1189516-65-1

Mol F.

: C23H25FN4O3

Mol W.

: 424.19

Cat No.

: SA49206

Impurities, Paliperidone

Paliperidone USP Related Compound A

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CAS No.

: 849903-79-3

Mol F.

: C11H16N2O2

Mol W.

: 208.3

Cat No.

: SA49201

Impurities, Paliperidone

Paliperidone USP Related Compound B

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CAS No.

: 84163-77-9

Mol F.

: C12H13FN2O

Mol W.

: 220.2

Cat No.

: SA49202

Impurities, Paliperidone

Paliperidone USP Related Compound C

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CAS No.

: 130049-82-0

Mol F.

: C11H15ClN2O2

Mol W.

: 242.7

Cat No.

: SA49203

Impurities, Paliperidone

Paliperidone USP Related Compound D

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CAS No.

: 761460-08-6

Mol F.

: C23H27FN4O4

Mol W.

: 442.5

Cat No.

: SA49204

Impurities, Paliperidone

Paliperidone Z-Oxime

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CAS No.

: 1388021-47-3

Mol F.

: C23H28F2N4O3

Mol W.

: 446.5

Cat No.

: SA49205

Fingolimod, Impurities

Palmitate Amide Fingolimod Impurity

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CAS No.

: 1242271-26-6

Mol F.

: C35H63NO3

Mol W.

: 545.88

Cat No.

: SA34519

Impurities, Nitrosamine

Palonosetron Hydrochloride nitrosamine impurity

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CAS No.

: NA

Mol F.

: C15H21N3O

Mol W.

: 259.35

Cat No.

: SA44609

Impurities, Pantoprazole

Pantoprazole

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CAS No.

: 102625-70-7

Mol F.

: C₁₆H₁₅F₂N₃O₄S

Mol W.

: 383.4

Cat No.

: SA29100

Impurities, Pantoprazole

Pantoprazole EP Impurity A

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CAS No.

: 127780-16-9

Mol F.

: C16H15F2N3O5S

Mol W.

: 399.37

Cat No.

: SA29101

Impurities, Pantoprazole

Pantoprazole EP Impurity B

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CAS No.

: 102625-64-9

Mol F.

: C16H15F2N3O3S

Mol W.

: 367.37

Cat No.

: SA29102

Impurities, Pantoprazole

Pantoprazole EP Impurity C

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CAS No.

: 97963-62-7

Mol F.

: C8H6F2N2OS

Mol W.

: 216.21

Cat No.

: SA29103

Impurities, Pantoprazole

Pantoprazole EP Impurity D

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CAS No.

: 624742-53-6

Mol F.

: C17H17F2N3O4S

Mol W.

: 397.4

Cat No.

: SA29104

Impurities, Pantoprazole

Pantoprazole N-Methyl 5-Difluoromethoxy Thiol Impurity

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CAS No.

: NA

Mol F.

: C9H10N2OS

Mol W.

: 230.23

Cat No.

: SA29111

Impurities, Pantoprazole

Pantoprazole N-Methyl 6-Difluoromethoxy Thiol Impurity

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CAS No.

: NA

Mol F.

: C9H10N2OS

Mol W.

: 230.23

Cat No.

: SA29112

Impurities, Pantoprazole

Pantoprazole N-Oxide

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CAS No.

: 953787-60-5

Mol F.

: C16H15F2N3O5S

Mol W.

: 399.37

Cat No.

: SA29108

Impurities, Pantoprazole

Pantoprazole Sulfide N-Methyl 5-Difluoromethoxy Analog

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CAS No.

: NA

Mol F.

: C17H17F2N3O3S

Mol W.

: 381.4

Cat No.

: SA29109

Impurities, Pantoprazole

Pantoprazole Sulfide N-Methyl 6-Difluoromethoxy Analog

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CAS No.

: NA

Mol F.

: C17H17F2N3O3S

Mol W.

: 381.4

Cat No.

: SA29110

Impurities, Pantoprazole

Pantoprazole Sulfone N-Oxide

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CAS No.

: 953787-55-8

Mol F.

: C16H15F2N3O6S

Mol W.

: 415.37

Cat No.

: SA29107

Impurities, Paroxetine

Paroxetine Dimer N-Methyl Analog

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CAS No.

: NA

Mol F.

: C41H44F2N2O6

Mol W.

: 698.79

Cat No.

: SA18313

Impurities, Paroxetine

Paroxetine Hydrochloride

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CAS No.

: 78246-49-8

Mol F.

: C₁₉H₂₁ClFNO₃

Mol W.

: 365.83

Cat No.

: SA18314

Impurities, Paroxetine

Paroxetine Hydrochloride Anhydrous EP Impurity A

$550.00 25 mg

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CAS No.

: 1394842-91-1

Mol F.

: C19H21NO3

Mol W.

: 311.37

Cat No.

: SA18306

Impurities, Paroxetine

Paroxetine Hydrochloride Anhydrous EP Impurity B

$80.00 25 mg

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CAS No.

: 533-31-3

Mol F.

: C7H6O3

Mol W.

: 138.12

Cat No.

: SA18308

Impurities, Paroxetine

Paroxetine Hydrochloride Anhydrous EP Impurity F

$350.00 25 mg

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CAS No.

: 105813-39-6; 105813-40-9

Mol F.

: C26H27NO3

Mol W.

: 401.5

Cat No.

: SA18307

Impurities, Paroxetine

Paroxetine Hydrochloride Anhydrous EP Impurity J

$1,550.00 25 mg

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CAS No.

Mol F.

: C25H24FNO3

Mol W.

: 405.46

Cat No.

: SA18302

Impurities, Paroxetine

Paroxetine Hydrochloride Hemihydrate EP Impurity F

$1,550.00 25 mg

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CAS No.

: 606968-05-2

Mol F.

: C39H40F2N2O6

Mol W.

: 670.74

Cat No.

: SA18312

Impurities, Pazopanib

Pazopanib

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CAS No.

: 444731-52-6

Mol F.

: C21H23N7O2S

Mol W.

: 437.52

Cat No.

: SA51300

Impurities, Pazopanib

Pazopanib Chloro Impurity

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CAS No.

: 444731-75-3

Mol F.

: C14H14ClN5

Mol W.

: 287.75

Cat No.

: SA51311

Impurities, Pazopanib

Pazopanib Dimer

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CAS No.

: 2095544-42-4

Mol F.

: C42H43N13O4S2

Mol W.

: 858.01

Cat No.

: SA51304

Impurities, Pazopanib

Pazopanib Dimer Impurity

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CAS No.

: 1226499-98-4

Mol F.

: C22H22N8

Mol W.

: 398.5

Cat No.

: SA51308

Impurities, Pazopanib

Pazopanib Impurity 11

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CAS No.

: 1296888-47-5

Mol F.

: C15H17N5O

Mol W.

: 283.33

Cat No.

: SA51313

Impurities, Pazopanib

Pazopanib Impurity 17

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CAS No.

: 1821666-71-0

Mol F.

: C14H16N6

Mol W.

: 268.32

Cat No.

: SA51302

Impurities, Pazopanib

Pazopanib Impurity 19

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CAS No.

: 1821666-70-9

Mol F.

: C12H15N5O2S

Mol W.

: 293.3

Cat No.

: SA51303

Impurities, Pazopanib

Pazopanib Impurity 29

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CAS No.

: 1296888-46-4

Mol F.

: C16H20N6

Mol W.

: 296.4

Cat No.

: SA51305

Impurities, Pazopanib

Pazopanib Impurity 37

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CAS No.

: 1252927-45-9

Mol F.

: C14H14ClN5

Mol W.

: 287.75

Cat No.

: SA51301

Impurities, Pazopanib

Pazopanib Impurity 39

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CAS No.

: 1226499-97-3

Mol F.

: C13H12ClN5

Mol W.

: 273.7

Cat No.

: SA51307