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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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Febuxostat Isopropyl Isomer | 144060-52-6 | Febuxostat

,

Febuxostat Isopropyl Isomer
Please enquire for price & pack size
In Stock

CAS No.

: 144060-52-6

Mol F.

: C15H14N2O3S

Mol W.

: 302.35

Cat No.

: SA32001

Febuxostat n-Butyl Isomer | 1657014-33-9 | Febuxostat

,

Febuxostat n-Butyl Isomer
$130.00 25 mg
In Stock

CAS No.

: 1657014-33-9

Mol F.

: C16H16N2O3S

Mol W.

: 316.37

Cat No.

: SA32006

FEBUXOSTAT SYSTEM SUITABILITY MIXTURE | Febuxostat

FEBUXOSTAT SYSTEM SUITABILITY MIXTURE
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C35H38N4O6S2

Mol W.

: 674.83

Cat No.

: SA32022

Felodipine | 72509-76-3 | Felodipine

,

Felodipine
$150.00 100 mg
In Stock

CAS No.

: 72509-76-3

Mol F.

: C18H19Cl2NO4

Mol W.

: 384.25

Cat No.

: SA37100

Felodipine EP Impurity A | 96382-71-7 | Felodipine

,

Felodipine EP Impurity A
$85.00 25 mg
In Stock

CAS No.

: 96382-71-7

Mol F.

: C18H17Cl2NO4

Mol W.

: 382.23

Cat No.

: SA37101

Felodipine EP Impurity B | 91189-59-2 | Felodipine

,

Felodipine EP Impurity B
$150.00 100 mg
In Stock

CAS No.

: 91189-59-2

Mol F.

: C17H17Cl2NO4

Mol W.

: 370.22

Cat No.

: SA37102

Felodipine EP Impurity C | 79925-38-5 | Felodipine

,

Felodipine EP Impurity C
$150.00 100 mg
In Stock

CAS No.

: 79925-38-5

Mol F.

: C19H21Cl2NO4

Mol W.

: 398.28

Cat No.

: SA37103

Fenofibrate | 49562-28-9 | Fenofibrate

,

Fenofibrate
$125.00 100 mg
In Stock

CAS No.

: 49562-28-9

Mol F.

: C20H21ClO4

Mol W.

: 360.83

Cat No.

: SA27200

Fenofibrate EP Impurity A | 42019-78-3 | Fenofibrate

Fenofibrate EP Impurity A
$95.00 100 mg
In Stock

CAS No.

: 42019-78-3

Mol F.

: C13H9ClO2

Mol W.

: 232.66

Cat No.

: SA27201

Fenofibrate EP Impurity B | 42017-89-0 | Fenofibrate

,

Fenofibrate EP Impurity B
$85.00 100 mg
In Stock

CAS No.

: 42017-89-0

Mol F.

: C17H15ClO4

Mol W.

: 318.75

Cat No.

: SA27202

Fenofibrate EP Impurity D | 42019-07-8 | Fenofibrate

,

Fenofibrate EP Impurity D
$85.00 25 mg
In Stock

CAS No.

: 42019-07-8

Mol F.

: C18H17Cl04

Mol W.

: 332.78

Cat No.

: SA27204

Fenofibrate EP Impurity E | 42019-08-9 | Fenofibrate

,

Fenofibrate EP Impurity E
$110.00 50 mg
In Stock

CAS No.

: 42019-08-9

Mol F.

: C19H19ClO4

Mol W.

: 346.8

Cat No.

: SA27205

Fenofibrate EP Impurity G | 217636-48-1 | Fenofibrate

,

Fenofibrate EP Impurity G
$125.00 50 mg
In Stock

CAS No.

: 217636-48-1

Mol F.

: C24H27ClO6

Mol W.

: 446.92

Cat No.

: SA27207

Flumethasone Acetate | 2823-42-9 | Flumethasone

,

Flumethasone Acetate
$95.00 25 mg
In Stock

CAS No.

: 2823-42-9

Mol F.

: C24H30F2O6

Mol W.

: 452.5

Cat No.

: SA50103

Flumethasone Impurity 2 | 1744-64-5 | Flumethasone

,

Flumethasone Impurity 2
$295.00 25 mg
In Stock

CAS No.

: 1744-64-5

Mol F.

: C22H28ClFO5

Mol W.

: 426.91

Cat No.

: SA50101

Flunisolide Related Compound B | 1997-76-8 | Flunisolide

,

Flunisolide Related Compound B
$250.00 25 mg
In Stock

CAS No.

: 1997-76-8

Mol F.

: C24H29FO6

Mol W.

: 432.48

Cat No.

: SA47502

Flunisolide Related Compound D | Flunisolide

,

Flunisolide Related Compound D
$295.00 25 mg
In Stock

CAS No.

Mol F.

: C24H30BrFO6

Mol W.

: 513.39

Cat No.

: SA47504

Fluorometholone 11,17-Diacetate | Fluorometholone

,

Fluorometholone 11,17-Diacetate
$395.00 25 mg
In Stock

CAS No.

Mol F.

: C26H33FO6

Mol W.

: 460.53

Cat No.

: SA38403

Fluorometholone 6-Desmethyl | 426-20-0 | Fluorometholone

,

Fluorometholone 6-Desmethyl
$275.00 25 mg
In Stock

CAS No.

: 426-20-0

Mol F.

: C21H27FO4

Mol W.

: 362.43

Cat No.

: SA38404

Fluorometholone Acetate 6,9(11)-diene | 95955-20-7 | Fluorometholone

,

Fluorometholone Acetate 6,9(11)-diene
$395.00 25 mg
In Stock

CAS No.

: 95955-20-7

Mol F.

: C₂₄H₂₈O₄

Mol W.

: 380.48

Cat No.

: SA38407

Fluorometholone Epoxy Metradiene | 83873-16-9 | Fluorometholone

,

Fluorometholone Epoxy Metradiene
$395.00 25 mg
In Stock

CAS No.

: 83873-16-9

Mol F.

: C22H28O3

Mol W.

: 356.46

Cat No.

: SA38406

Fluorometholone USP Related Compound A | 6870-94-6 | Fluorometholone

,

Fluorometholone USP Related Compound A
$150.00 25 mg
In Stock

CAS No.

: 6870-94-6

Mol F.

: C22H30O4

Mol W.

: 358.46

Cat No.

: SA38402

Fluoxymesterone API | 76-43-7 | FLUOXYMESTERONE

,

Fluoxymesterone API
$250.00 100 mg
In Stock

CAS No.

: 76-43-7

Mol F.

: C20H29FO3

Mol W.

: 336.44

Cat No.

: SA51200

Fluphenazine | 69-23-8 | Fluphenazine

,

Fluphenazine
$125.00 100 mg
In Stock

CAS No.

: 69-23-8

Mol F.

: C22H26F3N3OS

Mol W.

: 437.52

Cat No.

: SA39300

Flurbiprofen EP Impurity B | 1797883-74-9 | Flurbiprofen

,

Flurbiprofen EP Impurity B
$180.00 25 mg
In Stock

CAS No.

: 1797883-74-9

Mol F.

: C18H17FO4

Mol W.

: 316.32

Cat No.

: SA14602

Flurbiprofen EP Impurity D | 42771-79-9 | Flurbiprofen

,

Flurbiprofen EP Impurity D
$95.00 100 mg
In Stock

CAS No.

: 42771-79-9

Mol F.

: C14H11FO

Mol W.

: 214.23

Cat No.

: SA14601

Flurbiprofen EP Impurity E | 137045-30-8 | Flurbiprofen

,

Flurbiprofen EP Impurity E
$125.00 100 mg
In Stock

CAS No.

: 137045-30-8

Mol F.

: C13H9FO2

Mol W.

: 216.21

Cat No.

: SA14605

Fluticasone 11-Keto Impurity | 397864-56-1 | Fluticasone Furoate

,

Fluticasone 11-Keto Impurity
$250.00 25 mg
In Stock

CAS No.

: 397864-56-1

Mol F.

: C27H27F3O6S

Mol W.

: 536.56

Cat No.

: SA48215

Fluticasone 17-Acetoxy 17-Carboxylic Acid Impurity | 101916-26-1 | Fluticasone Propionate

,

Fluticasone 17-Acetoxy 17-Carboxylic Acid Impurity
$195.00 25 mg
In Stock

CAS No.

: 101916-26-1

Mol F.

: C23H28F2O6

Mol W.

: 438.5

Cat No.

: SA47032

Fluticasone 9,11-Ene 17-Hydroxy Carboxylic Acid Impurity | 133694-68-5 | Fluticasone Propionate

,

Fluticasone 9,11-Ene 17-Hydroxy Carboxylic Acid Impurity
$195.00 25 mg
In Stock

CAS No.

: 133694-68-5

Mol F.

: C21H25FO4

Mol W.

: 360.4

Cat No.

: SA47033

Fluticasone Carbothioic Acid Impurity | 80474-45-9 | Fluticasone Propionate

,

Fluticasone Carbothioic Acid Impurity
$150.00 25 mg
In Stock

CAS No.

: 80474-45-9

Mol F.

: C24H30F2O5S

Mol W.

: 468.55

Cat No.

: SA47020

Fluticasone Carboxylic Acid Impurity; Fluticasone USP Related Compound J | 28416-82-2 | Fluticasone Propionate

,

Fluticasone Carboxylic Acid Impurity; Fluticasone USP Related Compound J
$150.00 25 mg
In Stock

CAS No.

: 28416-82-2

Mol F.

: C21H26F2O5

Mol W.

: 396.42

Cat No.

: SA47017

Fluticasone Dimer Impurity | 220589-37-7 | Fluticasone Furoate

,

Fluticasone Dimer Impurity
$750.00 25 mg
In Stock

CAS No.

: 220589-37-7

Mol F.

: C43H51F5O8S

Mol W.

: 822.93

Cat No.

: SA48209

Fluticasone Dimer Impurity; Fluticasone EP Impurity G | 220589-37-7 | Fluticasone Propionate

,

Fluticasone Dimer Impurity; Fluticasone EP Impurity G
Please enquire for price & pack size
In Stock

CAS No.

: 220589-37-7

Mol F.

: C43H51F5O8S

Mol W.

: 822.92

Cat No.

: SA47009

Fluticasone EP Impurity A | 65429-42-7 | Fluticasone Propionate

Fluticasone EP Impurity A
$300.00 25 mg
In Stock

CAS No.

: 65429-42-7

Mol F.

: C25H31F3O5S

Mol W.

: 452.49

Cat No.

: SA47012

Fluticasone EP Impurity D; Ticabesone Propionate | 73205-13-7 | Fluticasone Propionate

,

Fluticasone EP Impurity D; Ticabesone Propionate
$150.00 25 mg
In Stock

CAS No.

: 73205-13-7

Mol F.

: C25H32F2O5S

Mol W.

: 482.58

Cat No.

: SA47004

Fluticasone EP Impurity H; Fluticasone Propionate EP Impurity H | 201812-64-8 | Fluticasone Propionate

Fluticasone EP Impurity H; Fluticasone Propionate EP Impurity H
$300.00 25 mg
In Stock

CAS No.

: 201812-64-8

Mol F.

: C48H58F4O10S2

Mol W.

: 935.09

Cat No.

: SA47010

Fluticasone EP Impurity I; Fluticasone Propionate EP Impurity I | 960071-64-1 | Fluticasone Propionate

Fluticasone EP Impurity I; Fluticasone Propionate EP Impurity I
$300.00 25 mg
In Stock

CAS No.

: 960071-64-1

Mol F.

: C48H58F4O10S3

Mol W.

: 967.2

Cat No.

: SA47011

Fluticasone EP Impurity K | Fluticasone Propionate

,

Fluticasone EP Impurity K
$1,000.00 25 mg
In Stock

CAS No.

Mol F.

: C25H31ClF2O5S

Mol W.

: 517.03

Cat No.

: SA47028

Fluticasone Furoate | 397864-44-7 | Fluticasone Furoate

,

Fluticasone Furoate
$95.00 25 mg
In Stock

CAS No.

: 397864-44-7

Mol F.

: C27H29F3O6S

Mol W.

: 538.58

Cat No.

: SA48200

Fluticasone Furoate EP Impurity A | 397864-63-0 | Fluticasone Furoate

,

Fluticasone Furoate EP Impurity A
$195.00 25 mg
In Stock

CAS No.

: 397864-63-0

Mol F.

: C26H28F2O7

Mol W.

: 490.49

Cat No.

: SA48201

Fluticasone Furoate EP Impurity B | 80474-24-4 | Fluticasone Furoate

,

Fluticasone Furoate EP Impurity B
$275.00 25 mg
In Stock

CAS No.

: 80474-24-4

Mol F.

: C24H29F3O5S

Mol W.

: 486.5

Cat No.

: SA48202

Fluticasone Furoate EP Impurity E | 398454-97-2 | Fluticasone Furoate

,

Fluticasone Furoate EP Impurity E
$250.00 25 mg
In Stock

CAS No.

: 398454-97-2

Mol F.

: C27H30F2O6S

Mol W.

: 520.6

Cat No.

: SA48203

Fluticasone Furoate EP Impurity F | Fluticasone Furoate

,

Fluticasone Furoate EP Impurity F
$250.00 25 mg
In Stock

CAS No.

Mol F.

: C29H34F2O7

Mol W.

: 532.6

Cat No.

: SA48204

Fluticasone Furoate EP Impurity G | 785806-96-4 | Fluticasone Furoate

,

Fluticasone Furoate EP Impurity G
$295.00 25 mg
In Stock

CAS No.

: 785806-96-4

Mol F.

: C27H29ClF2O6S

Mol W.

: 555

Cat No.

: SA48205

Fluticasone Furoate EP Impurity H | Fluticasone Furoate

,

Fluticasone Furoate EP Impurity H
$510.00 25 mg
In Stock

CAS No.

Mol F.

: C27H29ClF2O6S

Mol W.

: 555

Cat No.

: SA48206

Fluticasone Furoate EP Impurity J | Fluticasone Furoate

Fluticasone Furoate EP Impurity J
$250.00 25 mg
In Stock

CAS No.

Mol F.

: C27H28ClF3O6S

Mol W.

: 573

Cat No.

: SA48208

Fluticasone O- Fluoro methyl ester | 572880-17-2 | Fluticasone Furoate

,

Fluticasone O- Fluoro methyl ester
$250.00 25 mg
In Stock

CAS No.

: 572880-17-2

Mol F.

: C27H29F3O7

Mol W.

: 522.51

Cat No.

: SA48214

Fluticasone Propionate Dimethyl Amide Impurity | 105638-31-1 | Fluticasone Propionate

,

Fluticasone Propionate Dimethyl Amide Impurity
$95.00 25 mg
In Stock

CAS No.

: 105638-31-1

Mol F.

: C27H35F2NO6S

Mol W.

: 539.6

Cat No.

: SA47034

Fluticasone Propionate EP Impurity B; Fluticasone EP Impurity B | 948566-12-9 | Fluticasone Propionate

Fluticasone Propionate EP Impurity B; Fluticasone EP Impurity B
$350.00 25 mg
In Stock

CAS No.

: 948566-12-9

Mol F.

: C24H30F2O6S

Mol W.

: 484.55

Cat No.

: SA47002

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