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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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Buspirone, Impurities

Buspirone EP Impurity I

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CAS No.

: 2725354-99-2

Mol F.

: C21H30ClN5O2

Mol W.

: 419.95

Cat No.

: SA25808

Butamirate

Butamirate Impurity A

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CAS No.

: 140-82-9

Mol F.

: C8H19NO2

Mol W.

: 161.25

Cat No.

: SA62900

Butamirate

Butamirate Impurity C Trifluoroacetate

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CAS No.

: 33987-92-7

Mol F.

: C16H25NO3 : C6H8O7

Mol W.

: 279.4 : 192.1

Cat No.

: SA62901

Butamirate

Butamirate Impurity D

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CAS No.

: 92321-53-4

Mol F.

: C14H21NO

Mol W.

: 219.32

Cat No.

: SA62902

Butenafine

Butenafine Bis 4-(tert-Butyl)benzyl) Amine Impurity

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CAS No.

: 122152-13-0

Mol F.

: C23H33N

Mol W.

: 323.52

Cat No.

: SA66300

Butenafine

Butenafine N-Desmethyl Impurity

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CAS No.

: 101846-83-7

Mol F.

: C22H25N

Mol W.

: 303.4

Cat No.

: SA66301

Cabergoline

Cabergoline EP Impurity A

$1,555.00 100 mg

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CAS No.

: 81409-74-7

Mol F.

: C18H20N2O2

Mol W.

: 296.36

Cat No.

: SA51804

Cabozantinib, Impurities

Cabozantinib (S) Malate | CAS : 1140909-48-3

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CAS No.

: 1140909-48-3

Mol F.

: C32H30FN3O10

Mol W.

: 635.59

Cat No.

: SA52517

Cabozantinib, Impurities

Cabozantinib 2-Fluoro Impurity

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CAS No.

: NA

Mol F.

: C28H24FN3O5

Mol W.

: 501.5

Cat No.

: SA52501

Cabozantinib, Impurities

Cabozantinib 2-fluorophenyl amide Impurity

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CAS No.

: 918642-61-2

Mol F.

: C11H10FNO3

Mol W.

: 223.2

Cat No.

: SA52522

Cabozantinib, Impurities

Cabozantinib 3-Fluoro Impurity

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CAS No.

: NA

Mol F.

: C28H24FN3O5

Mol W.

: 501.5

Cat No.

: SA52502

Cabozantinib, Impurities

Cabozantinib 3-fluorophenyl amide Impurity | CAS : 1247859-37-5

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CAS No.

: 1247859-37-5

Mol F.

: C11H10FNO3

Mol W.

: 223.2

Cat No.

: SA52523

Cabozantinib, Impurities

Cabozantinib 4-Chlorophenyl Analog

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CAS No.

: NA

Mol F.

: C28H24ClN3O5

Mol W.

: 518.0

Cat No.

: SA52515

Cabozantinib

Cabozantinib 4-Fluorophenyl Amide Impurity

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CAS No.

: 849217-48-7

Mol F.

: C11H10FNO3

Mol W.

: 223.2

Cat No.

: SA52525

Cabozantinib, Impurities

Cabozantinib 4-fluorophenyl amide Impurity | CAS : 1345847-71-3

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CAS No.

: 1345847-71-3

Mol F.

: C12H12FNO3

Mol W.

: 237.2

Cat No.

: SA52520

Cabozantinib, Impurities

Cabozantinib 4-fluorophenyl oxalamide Dimer Impurity

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CAS No.

: 10197-51-0

Mol F.

: C14H10F2N2O2

Mol W.

: 276.2

Cat No.

: SA52521

Cabozantinib, Impurities

Cabozantinib 4-nitrophenoxy Impurity | CAS : 190728-24-6

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CAS No.

: 190728-24-6

Mol F.

: C17H14N2O5

Mol W.

: 326.3

Cat No.

: SA52510

Cabozantinib, Impurities

Cabozantinib 6-hydroxy Impurity | CAS : 1628530-47-1

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CAS No.

: 1628530-47-1

Mol F.

: C27H22FN3O5

Mol W.

: 487.5

Cat No.

: SA52506

Cabozantinib, Impurities

Cabozantinib 7-hydroxy Impurity | CAS : 1628530-42-6

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CAS No.

: 1628530-42-6

Mol F.

: C27H22FN3O5

Mol W.

: 487.5

Cat No.

: SA52505

Cabozantinib, Impurities

Cabozantinib API | CAS : 849217-68-1

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CAS No.

: 849217-68-1

Mol F.

: C28H24FN3O5

Mol W.

: 501.5

Cat No.

: SA52500

Cabozantinib, Impurities

Cabozantinib Bis(4-fluorophenyl) dicarboxamide Impurity

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CAS No.

: 1431468-36-8

Mol F.

: C17H14F2N2O2

Mol W.

: 316.3

Cat No.

: SA52511

Cabozantinib, Impurities

Cabozantinib Carboxylic Acid Impurity | CAS : 849217-77-2

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CAS No.

: 849217-77-2

Mol F.

: C22H20N2O6

Mol W.

: 408.4

Cat No.

: SA52504

Cabozantinib, Impurities

Cabozantinib Chloro Impurity | CAS : 35654-56-9

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CAS No.

: 35654-56-9

Mol F.

: C11H10ClNO2

Mol W.

: 223.7

Cat No.

: SA52524

Cabozantinib, Impurities

Cabozantinib cyclopropyl dicarboxamide Dimer

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CAS No.

: 2439164-91-5

Mol F.

: C39H34N4O8

Mol W.

: 686.7

Cat No.

: SA52516

Cabozantinib, Impurities

Cabozantinib Des Cyclopropanyl Acetamide Impurity

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CAS No.

: 651054-52-3

Mol F.

: C19H18N2O4

Mol W.

: 338.4

Cat No.

: SA52527

Cabozantinib, Impurities

Cabozantinib Des Fluoro Impurity | CAS : 849221-94-9

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CAS No.

: 849221-94-9

Mol F.

: C28H25N3O5

Mol W.

: 483.5

Cat No.

: SA52503

Cabozantinib, Impurities

Cabozantinib Fumarate

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CAS No.

: NA

Mol F.

: C32H28FN3O9

Mol W.

: 617.59

Cat No.

: SA52508

Cabozantinib, Impurities

Cabozantinib Hydroxyphenyl Impurity | CAS : 849217-60-3

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CAS No.

: 849217-60-3

Mol F.

: C17H15FN2O3

Mol W.

: 314.3

Cat No.

: SA52509

Cabozantinib, Impurities

Cabozantinib Methyl Ester Analog | CAS : 1584696-82-1

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CAS No.

: 1584696-82-1

Mol F.

: C23H22N2O6

Mol W.

: 422.4

Cat No.

: SA52512

Cabozantinib, Impurities

Cabozantinib N-oxide Impurity | CAS : 1621681-63-7

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CAS No.

: 1621681-63-7

Mol F.

: C28H24FN3O6

Mol W.

: 517.5

Cat No.

: SA52513

Cabozantinib, Impurities

Cabozantinib Oxalamide Dimer Impurity | CAS : 2832439-31-1

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CAS No.

: 2832439-31-1

Mol F.

: C36H30N4O8

Mol W.

: 646.7

Cat No.

: SA52507

Cabozantinib, Impurities

Cabozantinib oxy aniline Impurity | CAS : 190728-25-7

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CAS No.

: 190728-25-7

Mol F.

: C17H16N2O3

Mol W.

: 296.3

Cat No.

: SA52519

Cabozantinib

Cabozantinib Phenylcarbamoyl Acid Impurity

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CAS No.

: NA

Mol F.

: C11H11NO3

Mol W.

: 205.21

Cat No.

: SA52526

Cabozantinib, Impurities

Cabozantinib Quinolinol Impurity | CAS : 13425-93-9

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CAS No.

: 13425-93-9

Mol F.

: C11H11NO3

Mol W.

: 205.2

Cat No.

: SA52518

Cabozantinib, Impurities

Cabozantinib Urea Dimer | CAS : 2840522-81-6

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CAS No.

: 2840522-81-6

Mol F.

: C35H30N4O7

Mol W.

: 618.6

Cat No.

: SA52514

Caffeine

Caffeine EP Impurity B

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CAS No.

: 7597-60-6

Mol F.

: C7H10N4O3

Mol W.

: 198.18

Cat No.

: SA63000

Caffeine

Caffeine EP Impurity C

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CAS No.

: 519-32-4

Mol F.

: C8H10N4O2

Mol W.

: 194.19

Cat No.

: SA63001

Caffeine

Caffeine EP Impurity D

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CAS No.

: 83-67-0

Mol F.

: C₇H₈N₄O₂

Mol W.

: 180.16

Cat No.

: SA63002

Caffeine

Caffeine EP Impurity E

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CAS No.

: 20041-90-1

Mol F.

: C7H12N4O

Mol W.

: 168.2

Cat No.

: SA63003

Caffeine

Caffeine EP Impurity F

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CAS No.

: 611-59-6

Mol F.

: C7H8N4O2

Mol W.

: 180.16

Cat No.

: SA63004

Canagliflozin, Impurities

Canagliflozin

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CAS No.

: 842133-18-0

Mol F.

: C₂₄H₂₅FO₅S

Mol W.

: 444.52

Cat No.

: SA14911

Canagliflozin, Impurities

Canagliflozin (S,S,S,S,R) Furanose Isomer

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CAS No.

Mol F.

: C24H25FO5S

Mol W.

: 444.5

Cat No.

: SA14936

Canagliflozin, Impurities

Canagliflozin 2,3-dehydroxy impurity

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CAS No.

Mol F.

: C24H23FO4S

Mol W.

: 426.5

Cat No.

: SA14920

Canagliflozin, Impurities

Canagliflozin Acetophenon Impurity

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CAS No.

Mol F.

: C20H17FOS

Mol W.

: 324.42

Cat No.

: SA14913

Canagliflozin, Impurities

Canagliflozin Bromo Impurity

$85.00 25 mg

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CAS No.

: 1030825-20-7

Mol F.

: C18H14BrFS

Mol W.

: 361.27

Cat No.

: SA14916

Canagliflozin, Impurities

Canagliflozin Chloro Impurity; 2′-Deshydroxymethyl-2′-Chloromethyl-canagliflozin

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CAS No.

Mol F.

: C24H24ClFO4S

Mol W.

: 463

Cat No.

: SA14928

Canagliflozin, Impurities

Canagliflozin Dimer

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CAS No.

Mol F.

: C48H48F2O10S2

Mol W.

: 887.02

Cat No.

: SA14907

Canagliflozin, Impurities

Canagliflozin Dimer Impurity

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CAS No.

Mol F.

: C48H48F2O10S2

Mol W.

: 887.02

Cat No.

: SA14931

Canagliflozin

Canagliflozin Furanose Impurity

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CAS No.

: 2161394-94-9

Mol F.

: C24H25FO5S

Mol W.

: 444.52

Cat No.

: SA14929

Canagliflozin, Impurities

Canagliflozin Hydroperoxide

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CAS No.

: 2247196-28-5

Mol F.

: C24H25FO7S

Mol W.

: 476.51

Cat No.

: SA14918