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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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Ezetimibe, Impurities

Ezetimibe desfluoro chloro impurity

$350.00 25 mg

In Stock

CAS No.

: 1700622-08-7

Mol F.

: C24H21ClFNO3

Mol W.

: 425.88

Cat No.

: SA14820

Ezetimibe, Impurities

Ezetimibe desfluoro methyl impurity

$350.00 25 mg

In Stock

CAS No.

: 1700622-07-6

Mol F.

: C25H24FNO3

Mol W.

: 405.46

Cat No.

: SA14819

Ezetimibe, Impurities

Ezetimibe Diacetate

$350.00 25 mg

In Stock

CAS No.

: 163380-20-9

Mol F.

: C28H25F2NO5

Mol W.

: 493.5

Cat No.

: SA14807

Ezetimibe, Impurities

Ezetimibe Diol

$395.00 25 mg

In Stock

CAS No.

: 1374250-08-4

Mol F.

: C24H25F2NO3

Mol W.

: 413.47

Cat No.

: SA14815

Ezetimibe, Impurities

Ezetimibe Impurity B; methyl 5-(4-fluorophenyl)-5-oxopentanoate

$150.00 25 mg

In Stock

CAS No.

: 1368310-60-4

Mol F.

: C12H15FO3

Mol W.

: 226.25

Cat No.

: SA14827

Ezetimibe, Impurities

Ezetimibe Ketone

$150.00 25 mg

In Stock

CAS No.

: 191330-56-0

Mol F.

: C24H19F2NO3

Mol W.

: 407.41

Cat No.

: SA14803

Ezetimibe

Ezetimibe m-fluoro aniline analog

$200.00 25 mg

In Stock

CAS No.

: 1700622-06-5

Mol F.

: C24H21F2NO3

Mol W.

: 409.43

Cat No.

: SA14818

Ezetimibe

Ezetimibe Resolution Mixture

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C24H21F2NO3

Mol W.

: 409.42

Cat No.

: SA14854

Ezetimibe, Impurities

Ezetimibe Tetrahydropyran Impurity

$150.00 25 mg

In Stock

CAS No.

: 1296129-15-1; 1050631-82-7

Mol F.

: C24H21F2NO3

Mol W.

: 409.43

Cat No.

: SA14801

Ezetimibe, Impurities

Ezetimibe TMS intermediate

$80.00 25 mg

In Stock

CAS No.

: 272778-12-8

Mol F.

: C39H46F2N2O5Si2

Mol W.

: 716.96

Cat No.

: SA14835

Famotidine, Impurities

Famotidine Chloromethyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 81152-53-6

Mol F.

: C5H7ClN4S

Mol W.

: 190.65

Cat No.

: SA40814

Famotidine, Impurities

Famotidine EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 76824-17-4

Mol F.

: C8H15ClN6O3S3 (HCl salt)

Mol W.

: 374.89

Cat No.

: SA40803

Famotidine, Impurities

Famotidine EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 76824-16-3

Mol F.

: C8H13N5OS2

Mol W.

: 259.36

Cat No.

: SA40804

Famotidine, Impurities

Famotidine EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 129083-44-9

Mol F.

: C10H14N8S4

Mol W.

: 374.53

Cat No.

: SA40805

Famotidine, Impurities

Famotidine EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 107880-74-0

Mol F.

: C8H12N4O2S2

Mol W.

: 260.34

Cat No.

: SA40806

Famotidine, Impurities

Famotidine EP Impurity I

Please enquire for price & pack size

In Stock

CAS No.

: 1020719-36-1

Mol F.

: C8H14N6O4S3 : HCl

Mol W.

: 354.43

Cat No.

: SA40808

Famotidine, Impurities

Famotidine EP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: 76824-14-1(free base); 1798006-30-0

Mol F.

: C9H14N4O2S2

Mol W.

: 274.37

Cat No.

: SA40810

Famotidine, Impurities

Famotidine Isothiourea Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 88046-01-9; 106649-96-1 (Free Base)

Mol F.

: C6H10N6S2

Mol W.

: 230.32

Cat No.

: SA40813

Famotidine, Impurities

Famotidine Sulfoxide

Please enquire for price & pack size

In Stock

CAS No.

: 90237-03-9

Mol F.

: C8H15N7O3S3

Mol W.

: 353.44

Cat No.

: SA40809

Febuxostat, Impurities

Febuxostat

Please enquire for price & pack size

In Stock

CAS No.

: 144060-53-7

Mol F.

: C16H16N2O3S

Mol W.

: 316.37

Cat No.

: SA32000

Febuxostat, Impurities

Febuxostat 2-Butyl Isomer

Please enquire for price & pack size

In Stock

CAS No.

: 1335202-59-9

Mol F.

: C16H16N2O3S

Mol W.

: 316.37

Cat No.

: SA32002

Febuxostat, Impurities

Febuxostat Amide Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1239233-86-3

Mol F.

: C16H18N2O4S

Mol W.

: 334.39

Cat No.

: SA32010

Febuxostat, Impurities

Febuxostat Ethyl Ester

Please enquire for price & pack size

In Stock

CAS No.

: 160844-75-7

Mol F.

: C18H20N2O3S

Mol W.

: 344.43

Cat No.

: SA32019

Febuxostat, Impurities

Febuxostat Isopropyl Ester

Please enquire for price & pack size

In Stock

CAS No.

: 1346238-10-5

Mol F.

: C19H22N2O3S

Mol W.

: 358.45

Cat No.

: SA32005

Febuxostat, Impurities

Febuxostat Isopropyl Isomer

Please enquire for price & pack size

In Stock

CAS No.

: 144060-52-6

Mol F.

: C15H14N2O3S

Mol W.

: 302.35000000000002

Cat No.

: SA32001

Febuxostat, Impurities

Febuxostat n-Butyl Isomer

Please enquire for price & pack size

In Stock

CAS No.

: 1657014-33-9

Mol F.

: C16H16N2O3S

Mol W.

: 316.37

Cat No.

: SA32006

Febuxostat, Impurities

FEBUXOSTAT SYSTEM SUITABILITY MIXTURE

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C35H38N4O6S2

Mol W.

: 674.83

Cat No.

: SA32022

Felodipine, Impurities

Felodipine

Please enquire for price & pack size

In Stock

CAS No.

: 72509-76-3

Mol F.

: C18H19Cl2NO4

Mol W.

: 384.25

Cat No.

: SA37100

Felodipine, Impurities

Felodipine EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 96382-71-7

Mol F.

: C18H17Cl2NO4

Mol W.

: 382.23

Cat No.

: SA37101

Felodipine, Impurities

Felodipine EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 91189-59-2

Mol F.

: C17H17Cl2NO4

Mol W.

: 370.22

Cat No.

: SA37102

Felodipine, Impurities

Felodipine EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C19H21Cl2NO4

Mol W.

: 398.28

Cat No.

: SA37103

Fenofibrate, Impurities

Fenofibrate

Please enquire for price & pack size

In Stock

CAS No.

: 49562-28-9

Mol F.

: C20H21ClO4

Mol W.

: 360.83

Cat No.

: SA27200

Fenofibrate, Impurities

Fenofibrate EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 42019-78-3

Mol F.

: C13H9ClO2

Mol W.

: 232.66

Cat No.

: SA27201

Fenofibrate, Impurities

Fenofibrate EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 42017-89-0

Mol F.

: C17H15ClO4

Mol W.

: 318.75

Cat No.

: SA27202

Fenofibrate, Impurities

Fenofibrate EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 42019-07-8

Mol F.

: C18H17Cl04

Mol W.

: 332.78

Cat No.

: SA27204

Fenofibrate, Impurities

Fenofibrate EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 42019-08-9

Mol F.

: C19H19ClO4

Mol W.

: 346.8

Cat No.

: SA27205

Fenofibrate, Impurities

Fenofibrate EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 217636-48-1

Mol F.

: C24H27ClO6

Mol W.

: 446.92

Cat No.

: SA27207

Flumethasone, Impurities

Flumethasone Impurity 2

Please enquire for price & pack size

In Stock

CAS No.

: 1744-64-5

Mol F.

: C22H28ClFO5

Mol W.

: 426.91

Cat No.

: SA50101

Flunisolide, Impurities

Flunisolide Related Compound B

Please enquire for price & pack size

In Stock

CAS No.

: 1997-76-8

Mol F.

: C24H29FO6

Mol W.

: 432.48

Cat No.

: SA47502

Flunisolide, Impurities

Flunisolide Related Compound D

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C24H30BrFO6

Mol W.

: 513.39

Cat No.

: SA47504

Fluorometholone, Impurities

Fluorometholone 11,17-Diacetate

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C26H33FO6

Mol W.

: 460.53

Cat No.

: SA38403

Fluorometholone, Impurities

Fluorometholone 6-Desmethyl

Please enquire for price & pack size

In Stock

CAS No.

: 426-20-0

Mol F.

: C21H27FO4

Mol W.

: 362.43

Cat No.

: SA38404

Fluorometholone, Impurities

Fluorometholone Acetate 6,9(11)-diene

Please enquire for price & pack size

In Stock

CAS No.

: 95955-20-7

Mol F.

: C₂₄H₂₈O₄

Mol W.

: 380.48

Cat No.

: SA38407

Fluorometholone, Impurities

Fluorometholone Epoxy Metradiene

Please enquire for price & pack size

In Stock

CAS No.

: 83873-16-9

Mol F.

: C22H28O3

Mol W.

: 356.46

Cat No.

: SA38406

Fluorometholone, Impurities

Fluorometholone USP Related Ccompound A

Please enquire for price & pack size

In Stock

CAS No.

: 6870-94-6

Mol F.

: C22H30O4

Mol W.

: 358.46

Cat No.

: SA38402

FLUOXYMESTERONE, Impurities

Fluoxymesterone API

Please enquire for price & pack size

In Stock

CAS No.

: 76-43-7

Mol F.

: C20H29FO3

Mol W.

: 336.44

Cat No.

: SA51200

Fluphenazine, Impurities

Fluphenazine

Please enquire for price & pack size

In Stock

CAS No.

: 69-23-8

Mol F.

: C22H26F3N3OS

Mol W.

: 437.52

Cat No.

: SA39300

Flurbiprofen, Impurities

Flurbiprofen EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1797883-74-9

Mol F.

: C18H17FO4

Mol W.

: 316.32

Cat No.

: SA14602

Flurbiprofen, Impurities

Flurbiprofen EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 42771-79-9

Mol F.

: C14H11FO

Mol W.

: 214.23

Cat No.

: SA14601

Flurbiprofen, Impurities

Flurbiprofen EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 137045-30-8

Mol F.

: C13H9FO2

Mol W.

: 216.21

Cat No.

: SA14605