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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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Aciclovir, Impurities

Aciclovir EP Impurity R

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CAS No.

: NA

Mol F.

: C17H22N10O6

Mol W.

: 462.42

Cat No.

: SA21419

Aciclovir, Impurities

Aciclovir Monophosphate

$295.00 25 mg

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CAS No.

: 66341-16-0

Mol F.

: C8H12N5O6P

Mol W.

: 305.18

Cat No.

: SA21421

Aciclovir, Impurities

Aciclovir N-Methyl-L-valinate Hydrochloride

$250.00 25 mg

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CAS No.

: 1346617-39-7

Mol F.

: C14H23ClN6O4

Mol W.

: 374.82

Cat No.

: SA21420

Oxcarbazepine

Acridine

$95.00 25 mg

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CAS No.

: 260-94-6

Mol F.

: C13H9N

Mol W.

: 179.22

Cat No.

: SA12508

Oxcarbazepine

Acridine Carboxylic Acid Hydrate

$95.00 25 mg

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CAS No.

: 332927-03-4

Mol F.

: C15H9NO2

Mol W.

: 233.23

Cat No.

: SA12502

Adapalene, Impurities

Adapalene

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CAS No.

: 106685-40-9

Mol F.

: C28H28O3

Mol W.

: 412.5

Cat No.

: SA55100

Adapalene, Impurities

Adapalene EP Impurity A

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CAS No.

: 932033-58-4

Mol F.

: C22H14O4

Mol W.

: 342.3

Cat No.

: SA55101

Adapalene, Impurities

Adapalene EP Impurity B

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CAS No.

: 1346599-76-5

Mol F.

: C28H28O4

Mol W.

: 428.5

Cat No.

: SA55102

Adapalene, Impurities

Adapalene EP Impurity C

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CAS No.

: 43109-77-9

Mol F.

: C17H22O

Mol W.

: 242.4

Cat No.

: SA55103

Adapalene, Impurities

Adapalene EP Impurity D

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CAS No.

: 932033-57-3

Mol F.

: C34H42O2

Mol W.

: 482.7

Cat No.

: SA55104

Adapalene, Impurities

Adapalene Methyl Ester

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CAS No.

: 106685-41-0

Mol F.

: C29H30O3

Mol W.

: 426.5

Cat No.

: SA55105

Adapalene, Impurities

Adapalene USP Related Compound A

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CAS No.

: 33626-98-1

Mol F.

: C12H9BrO2

Mol W.

: 265.1

Cat No.

: SA55106

Albendazole, Impurities

Albendazole

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CAS No.

: 54965-21-8

Mol F.

: C12H15N3O2S

Mol W.

: 265.33

Cat No.

: SA31100

Albendazole, Impurities

Albendazole Chlorosulfonyl Analog

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CAS No.

: 79213-74-4

Mol F.

: C9H8ClN3O4S

Mol W.

: 289.7

Cat No.

: SA31109

Albendazole, Impurities

Albendazole EP Impurity A

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CAS No.

: 80983-36-4

Mol F.

: C10H13N3S

Mol W.

: 207.3

Cat No.

: SA31101

Albendazole, Impurities

Albendazole EP Impurity B

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CAS No.

: 54029-12-8

Mol F.

: C12H15N3O3S

Mol W.

: 281.33

Cat No.

: SA31102

Albendazole, Impurities

Albendazole EP Impurity C

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CAS No.

: 75184-71-3

Mol F.

: C12H15N3O4S

Mol W.

: 297.33

Cat No.

: SA31103

Albendazole, Impurities

Albendazole EP Impurity D

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CAS No.

: 80983-34-2

Mol F.

: C10H13N3O2S

Mol W.

: 239.29

Cat No.

: SA31104

Albendazole, Impurities

Albendazole EP Impurity E

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CAS No.

: 10605-21-7

Mol F.

: C9H9N302

Mol W.

: 191.19

Cat No.

: SA31105

Albendazole, Impurities

Albendazole EP Impurity F

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CAS No.

: 80983-45-5

Mol F.

: C10H11N302S

Mol W.

: 237.28

Cat No.

: SA31106

Albendazole, Impurities

Albendazole EP Impurity I

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CAS No.

: 20559-55-1

Mol F.

: C12H15N3O3

Mol W.

: 249.3

Cat No.

: SA31111

Albendazole, Impurities

Albendazole Impurity G

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CAS No.

: 139751-05-6

Mol F.

: C13H17N3O2S

Mol W.

: 279.36

Cat No.

: SA31107

Albendazole, Impurities

Albendazole Impurity H

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CAS No.

: 20367-38-8

Mol F.

: C9H8ClN3O2

Mol W.

: 225.63

Cat No.

: SA31108

Albendazole, Impurities

Albendazole Mercapto Analog

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CAS No.

: 79213-76-6

Mol F.

: C9H9N3O2S

Mol W.

: 223.25

Cat No.

: SA31110

Impurities, Salbutamol

Albuterol Related Compound F | CAS : 1221742-55-7

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CAS No.

: 1221742-55-7

Mol F.

: C15H25NO3

Mol W.

: 267.4

Cat No.

: SA26022

Alcaftadine, Impurities

Alcaftadine

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CAS No.

: 147084-10-4

Mol F.

: C19H21N3O

Mol W.

: 307.39

Cat No.

: SA31000

Alcaftadine, Impurities

Alcaftadine 3-Carboxylic Acid Impurity

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CAS No.

: 147083-93-0

Mol F.

: C19H21N3O2

Mol W.

: 323.39

Cat No.

: SA31001

Alcaftadine, Impurities

Alcaftadine 3-hydroxy methyl Impurity

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CAS No.

: 147083-89-4

Mol F.

: C19H23N3O

Mol W.

: 309.41

Cat No.

: SA31003

Alcaftadine, Impurities

Alcaftadine di hydroxymethyl Impurity

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CAS No.

: 147083-92-9

Mol F.

: C20H25N3O2

Mol W.

: 339.44

Cat No.

: SA31007

Alcaftadine, Impurities

Alcaftadine dicarboxaldehyde Impurity

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CAS No.

: NA

Mol F.

: C20H21N3O2

Mol W.

: 335.41

Cat No.

: SA31005

Alcaftadine, Impurities

Alcaftadine Open Ring Impurity

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CAS No.

: NA

Mol F.

: C18H23N3O

Mol W.

: 297.4

Cat No.

: SA31004

Alcaftadine, Impurities

Alcaftadine-N-Oxide

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CAS No.

: 952649-75-1

Mol F.

: C19H21N3O2

Mol W.

: 323.39

Cat No.

: SA31002

Alclometasone Dipropionate, Impurities

Alclometasone

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CAS No.

: 67452-97-5

Mol F.

: C22H29ClO5

Mol W.

: 408.9

Cat No.

: SA56201

Alclometasone Dipropionate, Impurities

Alclometasone 17-Propionate

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CAS No.

: 76576-24-4

Mol F.

: C25H33ClO6

Mol W.

: 465

Cat No.

: SA56203

Alclometasone Dipropionate, Impurities

Alclometasone 21-Propionate

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CAS No.

: 129459-98-9

Mol F.

: C25H33ClO6

Mol W.

: 465

Cat No.

: SA56204

Alclometasone Dipropionate, Impurities

Alclometasone Dipropionate

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CAS No.

: 66734-13-2

Mol F.

: C28H37ClO7

Mol W.

: 521

Cat No.

: SA56200

Alclometasone Dipropionate, Impurities

Alclometasone Dipropionate USP Related Compound A

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CAS No.

: 71868-53-6

Mol F.

: C28H38O7

Mol W.

: 486.6

Cat No.

: SA56205

Alogliptin, Impurities

Alcohol Impurity of Alogliptin

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CAS No.

: NA

Mol F.

: C13H11N3O3

Mol W.

: 257.2

Cat No.

: SA54112

Donepezil, Impurities

Aldehyde Impurity Donepezil Impurity

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CAS No.

: 22065-85-6

Mol F.

: C13H17NO

Mol W.

: 203.28

Cat No.

: SA34320

Alfuzosin, Impurities

Alfuzosin

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CAS No.

: 81403-80-7

Mol F.

: C19H27N5O4

Mol W.

: 389.46

Cat No.

: SA55400

Alfuzosin, Impurities

Alfuzosin EP Impurity A

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CAS No.

: 98902-36-4

Mol F.

: C19H23N5O4

Mol W.

: 385.42

Cat No.

: SA55401

Alfuzosin, Impurities

Alfuzosin EP Impurity B

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CAS No.

: 23680-84-4

Mol F.

: C10H10ClN3O2

Mol W.

: 239.66

Cat No.

: SA55402

Alfuzosin, Impurities

Alfuzosin EP Impurity C

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CAS No.

: 98902-34-2

Mol F.

: C19H27N5O4

Mol W.

: 389.45

Cat No.

: SA55403

Alfuzosin, Impurities

Alfuzosin EP Impurity D

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CAS No.

: 76362-29-3

Mol F.

: C14H21N5O2

Mol W.

: 291.35

Cat No.

: SA55404

Alfuzosin, Impurities

Alfuzosin EP Impurity E

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CAS No.

: 1026411-59-5

Mol F.

: C15H21N5O3

Mol W.

: 319.37

Cat No.

: SA55405

Alfuzosin, Impurities

Alfuzosin EP Impurity F

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CAS No.

: 19216-53-6

Mol F.

: C12H16N4O2

Mol W.

: 248.28

Cat No.

: SA55406

Alfuzosin, Impurities

Alfuzosin EP Impurity G

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CAS No.

: 928780-95-4

Mol F.

: C24H30N8O4

Mol W.

: 494.55

Cat No.

: SA55407

Alimemazine, Impurities

Alimemazine

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CAS No.

: 84-96-8

Mol F.

: C18H22N2S

Mol W.

: 298.4

Cat No.

: SA55900

Alimemazine, Impurities

Alimemazine Dimer Impurity

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CAS No.

: NA

Mol F.

: C30H29N3S2

Mol W.

: 495.7

Cat No.

: SA55906

Alimemazine, Impurities

Alimemazine EP Impurity A

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CAS No.

: 10071-07-5

Mol F.

: C18H22N2OS

Mol W.

: 314.4

Cat No.

: SA55901