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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, Pregabalin

N-Formyl Pregabalin

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CAS No.

: 1488274-42-5

Mol F.

: C9H17NO3

Mol W.

: 187.2

Cat No.

: SA24845

Ribociclib

N-Formyl Ribociclib Impurity

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CAS No.

: 2460732-08-3

Mol F.

: C24H30N8O2

Mol W.

: 462.56

Cat No.

: SA47105

Impurities, Risdiplam

N-Formyl Risdiplam Impurity

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CAS No.

: NA

Mol F.

: C23H23N7O2

Mol W.

: 429.5

Cat No.

: SA52307

Impurities, Sitagliptin

N-Formyl Sitagliptin

$395.00 25 mg

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CAS No.

Mol F.

: C17H15F6N5O2

Mol W.

: 435.32

Cat No.

: SA10423

Impurities, Trimetazidine

N-Formyl Trimetazidine Impurity

$195.00 100 mg

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CAS No.

: 879646-17-0

Mol F.

: C15H22N2O4

Mol W.

: 294.35

Cat No.

: SA35112

Impurities, Nicotine

N-Formylnornicotine

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CAS No.

: 3000-81-5

Mol F.

: C₁₀H₁₂N₂O

Mol W.

: 176.22

Cat No.

: SA32211

Impurities, Lenalidomide

N-Glucoside Lenalidomide Impurity

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CAS No.

: NA

Mol F.

: C19H23N3O8

Mol W.

: 421.4

Cat No.

: SA34101

Fingolimod, Impurities

N-Hydroxy Fingolimod Impurity

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CAS No.

: NA

Mol F.

: C19H33NO3

Mol W.

: 323.47000000000003

Cat No.

: SA34516

Impurities, Lenalidomide

N-Hydroxy Lenalidomide Impurity

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CAS No.

: NA

Mol F.

: C₁₃H₁₃N₃O₄

Mol W.

: 275.26

Cat No.

: SA34102

Emtricitabine, Impurities

N-Hydroxy methyl Emtricitabine

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CAS No.

: NA

Mol F.

: C9H12FN3O4S

Mol W.

: 277.3

Cat No.

: SA22946

Impurities, Palbociclib

N-Hydroxy Palbociclib

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CAS No.

: 2231085-26-8

Mol F.

: C24H29N7O3

Mol W.

: 463.53

Cat No.

: SA40409

Impurities, Risdiplam

N-Hydroxy Risdiplam Impurity | CAS : 2250441-24-6

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CAS No.

: 2250441-24-6

Mol F.

: C22H23N7O2

Mol W.

: 417.46

Cat No.

: SA52309

Impurities, Sulfamethoxazole

N-Hydroxy Sulfamethoxazole

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CAS No.

: 114438-33-4

Mol F.

: C10H11N3O4S

Mol W.

: 269.28

Cat No.

: SA25506

Carvedilol, Impurities

N-Isopropyl Carvedilol

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CAS No.

: 1246819-01-1

Mol F.

: C₂₇H₃₂N₂O₄

Mol W.

: 448.55

Cat No.

: SA31710

Duloxetine, Impurities

N-Methyl Duloxetine (Racemic)

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CAS No.

: 116817-11-9

Mol F.

: C19H21NOS

Mol W.

: 311.44

Cat No.

: SA36323

Impurities, Lenalidomide

N-Methyl Lenalidomide Impurity

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CAS No.

: 2197421-58-0

Mol F.

: C14H15N3O3

Mol W.

: 273.29000000000002

Cat No.

: SA34103

Impurities, Omeprazole

N-Methyl Omeprazole (Mixture of Isomers)

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CAS No.

: 784143-42-6

Mol F.

: C18H21N3O3S

Mol W.

: 359.44

Cat No.

: SA19417

Impurities, Paroxetine

N-Methyl Paroxetine

$99.00 25 mg

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CAS No.

: 110429-36-2

Mol F.

: C20H22FNO3

Mol W.

: 343.4

Cat No.

: SA18316

Pioglitazone

N-Methyl Pioglitazone Impurity | CAS : 1333110-79-4

$995.00 100 mg

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CAS No.

: 1333110-79-4

Mol F.

: C20H22N2O3S

Mol W.

: 370.5

Cat No.

: SA52817

Ganciclovir, Impurities

N-Methyl Valganciclovir Hydrochloride

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CAS No.

: 1401562-16-0

Mol F.

: C₁₅H₂₄N₆O₅.HCl

Mol W.

: 368.39

Cat No.

: SA13717

Impurities, Varenicline

N-methyl varenicline Impurity

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CAS No.

: 328055-92-1

Mol F.

: C14H15N3

Mol W.

: 225.29

Cat No.

: SA39510

Impurities, Nitrosamine

N-Methyl-N-(4-oxobutyl)nitrous Amide

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CAS No.

: 339362-86-6

Mol F.

: C5H10N2O2

Mol W.

: 130.15

Cat No.

: SA446116

Impurities, Nitrosamine

N-Methyl-N-Nitroso Benzylamine

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CAS No.

: 937-40-6

Mol F.

: C8H10N2O

Mol W.

: 150.2

Cat No.

: SA446127

Impurities, Nitrosamine

N-Methyl-N-nitroso-2-propanamine

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CAS No.

: 30533-08-5

Mol F.

: C4H10N2O

Mol W.

: 102.14

Cat No.

: SA44645

Impurities, Nitrosamine

N-methyl-N-phenylnitrous amide

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CAS No.

: 614-00-6

Mol F.

: C7H8N2O

Mol W.

: 136.15

Cat No.

: SA446107

Impurities, Saxagliptin

N-methylcyanamide Saxagliptin carboxylic acid Impurity

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CAS No.

: NA

Mol F.

: C19H25N3O4

Mol W.

: 359.42

Cat No.

: SA27408

Alimemazine, Impurities

N-Nitoso Alimemazine EP Impurity B

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CAS No.

: NA

Mol F.

: C17H19N3OS

Mol W.

: 313.4

Cat No.

: SA55904

Impurities, Linagliptin, Nitrosamine

N-Nitoso Linagliptin N-Alkyl Dimer Impurity

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CAS No.

: NA

Mol F.

: C51H55N17O5

Mol W.

: 986.09

Cat No.

: SA49954

Impurities, Nitrosamine

N-Nitrosamine piperazine ethanol | CAS :48121-20-6

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CAS No.

: 48121-20-6

Mol F.

: C6H13N3O2

Mol W.

: 159.19

Cat No.

: SA446108

Impurities, Nitrosamine, Tranexamic Acid

N-Nitrosamine Tranexamic Acid Dimer

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CAS No.

Mol F.

: C16H26N2O5

Mol W.

: 326.39

Cat No.

: SA17409

Impurities, Nitrosamine

N-Nitroso Acetylcysteine

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CAS No.

: NA

Mol F.

: C5H8N2O4S

Mol W.

: 192.2

Cat No.

: SA446112

Amlodipine, Impurities, Nitrosamine

N-Nitroso Amlodipine

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CAS No.

Mol F.

: C20H24ClN3O6

Mol W.

: 437.88

Cat No.

: SA30518

Amoxicillin, Impurities, Nitrosamine

N-Nitroso Amoxicillin EP Impurity C

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CAS No.

: NA

Mol F.

: C16H18N4O6S

Mol W.

: 394.4

Cat No.

: SA15322

Amoxicillin, Impurities, Nitrosamine

N-Nitroso Amoxicillin EP Impurity D

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CAS No.

: NA

Mol F.

: C16H20N4O7S

Mol W.

: 412.4

Cat No.

: SA15321

Amoxicillin, Impurities, Nitrosamine

N-Nitroso Amoxicillin EP Impurity E

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CAS No.

: NA

Mol F.

: C15H20N4O5S

Mol W.

: 368.4

Cat No.

: SA15303

Apalutamide, Impurities, Nitrosamine

N-Nitroso Apalutamide

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CAS No.

: NA

Mol F.

: C21H14F4N6O3S

Mol W.

: 506.4

Cat No.

: SA55811

Apalutamide, Impurities, Nitrosamine

N-Nitroso Apalutamide Benzylamine Impurity

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CAS No.

: NA

Mol F.

: C13H13FN4O2

Mol W.

: 276.3

Cat No.

: SA55813

Aripiprazole

N-Nitroso Aripiprazole EP Impurity B

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CAS No.

: 2989508-28-1

Mol F.

: C10H11Cl2N3O

Mol W.

: 260.12

Cat No.

: SA24028

Impurities, Nitrosamine

N-Nitroso Arotinolol

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CAS No.

Mol F.

: C15H20N4O3S3

Mol W.

: 400.53

Cat No.

: SA44682

Aspartame, Impurities, Nitrosamine

N-Nitroso Aspartame

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CAS No.

: NA

Mol F.

: C14H17N3O6

Mol W.

: 323.3

Cat No.

: SA56304

Atazanavir, Impurities, Nitrosamine

N-Nitroso Atazanavir EP Impurity C

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CAS No.

: NA

Mol F.

: C26H42N6O8

Mol W.

: 566.7

Cat No.

: SA56813

Azelastine, Impurities, Nitrosamine

N-Nitroso Azelastine EP Impurity A

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CAS No.

: NA

Mol F.

: C7H7N3O2

Mol W.

: 165.2

Cat No.

: SA54711

Azelastine, Impurities, Nitrosamine

N-Nitroso Azelastine EP Impurity B

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CAS No.

: NA

Mol F.

: C14H20N4O2

Mol W.

: 276.3

Cat No.

: SA54710

Impurities, Nitrosamine

N-Nitroso Azelnidipine

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CAS No.

Mol F.

: C33H33N5O7

Mol W.

: 611.64

Cat No.

: SA44683

Azithromycin, Impurities, Nitrosamine

N-Nitroso Azithromycin EP Impurity A

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CAS No.

: NA

Mol F.

: C37H69N3O13

Mol W.

: 763.96

Cat No.

: SA10316

Benserazide, Impurities, Nitrosamine

N-Nitroso Benserazide

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CAS No.

: NA

Mol F.

: C10H14N4O6

Mol W.

: 286.2

Cat No.

: SA56604

Benzydamine, Impurities, Nitrosamine

N-Nitroso Benzydamine EP Impurity A

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CAS No.

: NA

Mol F.

: C19H23N3O3

Mol W.

: 341.4

Cat No.

: SA54608

Impurities, Nitrosamine

N-Nitroso Binimetinib

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CAS No.

: NA

Mol F.

: C17H14BrF2N5O4

Mol W.

: 470.2

Cat No.

: SA446129

Impurities, Nitrosamine

N-Nitroso Blonanserin Impurity

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CAS No.

Mol F.

: C21H25FN4O

Mol W.

: 368.5

Cat No.

: SA44667

Impurities, Nitrosamine

N-Nitroso Bromocriptine

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CAS No.

: NA

Mol F.

: C32H39BrN6O6

Mol W.

: 683.6

Cat No.

: SA44630