Home / Products / Impurities / Page 3

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.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Impurities, Pregabalin

(R)-Pregabalin

$125.00 25 mg

In Stock

CAS No.

: 148553-51-9

Mol F.

: C8H17NO2

Mol W.

: 159.23

Cat No.

: SA24802

Empagliflozin, Impurities

(R)-tetrahydrofuran-3-yl 4-nitrobenzenesulfonate

$232.00 25 mg

In Stock

CAS No.

Mol F.

: C10H11NO6S

Mol W.

: 273.26

Cat No.

: SA15136

Efinaconazole, Impurities

(S, S)-Efinaconazole KSM- Protected Epoxy Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C15H18F2O3

Mol W.

: 284.3

Cat No.

: SA23626

Efinaconazole, Impurities

(S,S)-Efinaconazole Diol

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C12H13F2N3O2

Mol W.

: 269.25

Cat No.

: SA23619

Efinaconazole, Impurities

(S,S)-Efinaconazole Epoxide

Please enquire for price & pack size

In Stock

CAS No.

: 135270-10-9

Mol F.

: C12H11F2N3O

Mol W.

: 251.23

Cat No.

: SA23611

Impurities, Vildagliptin

(S)-1-(2-Hydroxyacetyl)pyrrolidine-2-carbonitrile

$160.00 25 mg

In Stock

CAS No.

: 1563006-28-9

Mol F.

: C7H10N2O2

Mol W.

: 154.2

Cat No.

: SA23916

Building Blocks, Impurities

(S)-2-Amino-3-(4-methoxyphenyl)-2-methylpropanoic acid

Please enquire for price & pack size

In Stock

CAS No.

: 65555-88-6

Mol F.

: C11H15NO3

Mol W.

: 209.2

Cat No.

: SB10712

Carbidopa, Impurities

(S)-3-(3,4-DIMETHOXYBENZYL)-2-METHYL HYDANTOIC ACID

Please enquire for price & pack size

In Stock

CAS No.

: 28861-00-9

Mol F.

: C13H18N2O5

Mol W.

: 282.29

Cat No.

: SA31814

Carbidopa, Impurities

(S)-3-(3,4-Dimethoxyphenyl)-2-hydrazineyl-2-methylpropanoic Acid

Please enquire for price & pack size

In Stock

CAS No.

: 28860-96-0

Mol F.

: C12H18N2O4

Mol W.

: 254.29

Cat No.

: SA31813

Empagliflozin, Impurities

(S)-3-(4-chloro-3-(4-((S)-tetrahydrofuran-3-yloxy)benzyl)phenoxy)tetrahydrofuran

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C21H23ClO4

Mol W.

: 374.86

Cat No.

: SA15152

Impurities, Rivaroxaban

(S)-4-(4-(3-Amino-2-hydroxypropylamino)phenyl)morpholin-3-one

$150.00 25 mg

In Stock

CAS No.

: 1403383-56-1

Mol F.

: C13H19N3O3

Mol W.

: 265.31

Cat No.

: SA18628

Impurities, Rosuvastatin

(S)-4-chloro-3-((trimethylsilyl)oxy)butanenitrile

$90.00 25 mg

In Stock

CAS No.

: 727382-14-1

Mol F.

: C7H14ClNOSi

Mol W.

: 191.7

Cat No.

: SA121113

Canagliflozin, Impurities

(S)-Canagliflozin Furanose Impurity

$365.00 25 mg

In Stock

CAS No.

: 2161394-94-9

Mol F.

: C24H25FO5S

Mol W.

: 444.53

Cat No.

: SA14904

Impurities, Timolol

(S)-Didemethyltimolol Maleate

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C15H24N4O7

Mol W.

: 404.44

Cat No.

: SA23212

Impurities, Timolol

(S)-Hydroxy Timolol

Please enquire for price & pack size

In Stock

CAS No.

: 1227468-61-2

Mol F.

: C13H24N4O4S

Mol W.

: 332.42

Cat No.

: SA23215

Impurities, Sitagliptin

(S)-Sitagliptin N-Boc-Acid Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 922178-94-7

Mol F.

: C15H18F3NO4

Mol W.

: 333.3

Cat No.

: SA10448

Atorvastatin, Impurities

(S)-tert-butyl 6-cyano-5-hydroxy-3-oxohexanoate

$550.00 500 mg

In Stock

CAS No.

: 312745-90-7

Mol F.

: C11H17NO4

Mol W.

: 227.12

Cat No.

: SA17835

Betamethasone Dipropionate, Impurities

(Z)-Betamethasone-Δ17,20,21- Aldehyde

Please enquire for price & pack size

In Stock

CAS No.

: 52647-06-0

Mol F.

: C22H27FO4

Mol W.

: 374.45

Cat No.

: SA14514

Impurities, Rilpivirine

(Z)-Rilpivirine

Please enquire for price & pack size

In Stock

CAS No.

: 500287-94-5

Mol F.

: C22H18N6

Mol W.

: 366.42

Cat No.

: SA25403

Cephalexin, Impurities

∆2-Cephalexin; Cefalexin EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 79750-46-2

Mol F.

: C16H17N3O4S

Mol W.

: 347.39

Cat No.

: SA12008

Fulvestrant, Impurities

∆6-Fulvestrant

$1,100.00 25 mg

In Stock

CAS No.

: 2170200-14-1

Mol F.

: C32H45F5O3S

Mol W.

: 604.75

Cat No.

: SA11803

Impurities, Testosterone

∆6-testosteron cypionate

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C27H38O3

Mol W.

: 410.59

Cat No.

: SA16217

Impurities, Testosterone

∆8(9)-Testosterone

Please enquire for price & pack size

In Stock

CAS No.

: 2608628-54-0

Mol F.

: C19H26O2

Mol W.

: 286.41

Cat No.

: SA16224

Dexamethasone, Impurities

∆9 (11)-21- Ethyl formate Dexamethasone

$195.00 25 mg

In Stock

CAS No.

: 89561-92-2

Mol F.

: C25H32O6

Mol W.

: 428.52

Cat No.

: SA15528

Impurities, Prednisone

∆9,11 prednisone

$255.00 25 mg

In Stock

CAS No.

: 10184-69-7

Mol F.

: C21H26O4

Mol W.

: 342.43

Cat No.

: SA26215

Estradiol, Impurities

∆9(11)-Estradiol

Please enquire for price & pack size

In Stock

CAS No.

: 791-69-5

Mol F.

: C18H22O2

Mol W.

: 270.37

Cat No.

: SA13204

Impurities, Isavuconazole

1-(((2R,3S)-2-(2,5- difluorophenyl)-3-methyloxiran- 2-yl)methyl)-1H-1,2,4-triazole

$150.00 25 mg

In Stock

CAS No.

: 241479-73-2

Mol F.

: C12H11F2N3O

Mol W.

: 251.23

Cat No.

: SA44107

Impurities, Isavuconazole

1-(((2S,3R)-2-(2,5- difluorophenyl)-3-methyloxiran- 2-yl)methyl)-1H-1,2,4-triazole

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C12H11F2N3O

Mol W.

: 251.23

Cat No.

: SA44125

Efinaconazole, Impurities

1-((2-(2,4-Difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole (Racemic)

Please enquire for price & pack size

In Stock

CAS No.

: 124627-86-7

Mol F.

: C12H11F2N3O

Mol W.

: 251.23

Cat No.

: SA23623

Impurities, Isavuconazole

1-((2-(2,5-difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C12H11F2N3O

Mol W.

: 251.23

Cat No.

: SA44134

Impurities, Lorcaserin

1-((4-Chlorophenethyl)amino)propan-2-ol

Please enquire for price & pack size

In Stock

CAS No.

: 847063-13-2

Mol F.

: C11H16ClNO

Mol W.

: 213.7

Cat No.

: SA18801

Impurities, Venlafaxine

1-(1-(4-(Benzyloxy)phenyl)-2-(dimethylamino)ethyl)cyclohexanol

$995.00 100 mg

In Stock

CAS No.

: 93413-61-7

Mol F.

: C23H31NO2

Mol W.

: 353.5

Cat No.

: SA22729

Bupropion, Impurities

1-(2-Chlorophenyl)propan-1-one

$125.00 25 mg

In Stock

CAS No.

: 6323-18-8

Mol F.

: C9H9ClO

Mol W.

: 168.62

Cat No.

: SA12234

Aripiprazole, Impurities

1-(2,3-Dichlorophenylamino)-2-[2-(2,3-dichlorophenylamino)ethylamino]ethane

Please enquire for price & pack size

In Stock

CAS No.

: 1424857-89-5

Mol F.

: C16H17Cl4N3

Mol W.

: 393.13

Cat No.

: SA24025

Erlotinib, Impurities

1-(3-(6,7-bis(2-methoxyethoxy)quinazolin-4-ylamino)phenyl)ethanone hydrochloride

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C22H26ClN3O5

Mol W.

: 447.91

Cat No.

: SA25217

Bupropion, Impurities

1-(3-Chlorophenyl)-1-hydroxy-2-propanone

$90.00 25 mg

In Stock

CAS No.

: 857233-13-7

Mol F.

: C9H9ClO2

Mol W.

: 184.62

Cat No.

: SA12206

Bupropion, Impurities

1-(3-Chlorophenyl)-1,2-propanedione

$90.00 25 mg

In Stock

CAS No.

: 10557-17-2

Mol F.

: C9H7ClO2

Mol W.

: 182.6

Cat No.

: SA12208

Bupropion, Impurities

1-(3-Chlorophenyl)-2-hydroxy-1-propanone

$90.00 25 mg

In Stock

CAS No.

: 152943-33-4

Mol F.

: C9H9ClO2

Mol W.

: 184.62

Cat No.

: SA12205

Aripiprazole, Impurities

1-(3-Chlorophenyl)piperazine

Please enquire for price & pack size

In Stock

CAS No.

: 6640-24-0

Mol F.

: C10H13ClN2

Mol W.

: 196.68

Cat No.

: SA24009

Apremilast, Impurities

1-(3-ethoxy-4- methoxyphenyl)-2- (methylsulfonyl)ethanone

Please enquire for price & pack size

In Stock

CAS No.

: 1450657-28-9

Mol F.

: C12H16O5S

Mol W.

: 272.32

Cat No.

: SA30020

Bupropion, Impurities

1-(3,4-Dichlorophenyl)propan-1-one

$125.00 25 mg

In Stock

CAS No.

: 6582-42-9

Mol F.

: C9H8Cl2O

Mol W.

: 203.07

Cat No.

: SA12235

Apixaban, Impurities

1-(4-aminophenyl)-3-chloro-5,6-dihydropyridin-2(1H)-one

Please enquire for price & pack size

In Stock

CAS No.

: 1801881-15-1

Mol F.

: C11H11ClN2O

Mol W.

: 222.67

Cat No.

: SA39950

Apixaban, Impurities

1-(4-Aminophenyl)-3-morpholinopyridin-2(1H)-one

Please enquire for price & pack size

In Stock

CAS No.

: 2816305-40-3

Mol F.

: C15H17N3O2

Mol W.

: 271.31

Cat No.

: SA39951

Apixaban, Impurities

1-(4-Iodophenyl)-3-morpholino-5,6-dihydropyridin-2(1H)-one

Please enquire for price & pack size

In Stock

CAS No.

: 473927-69-4

Mol F.

: C15H17IN2O2

Mol W.

: 384.21

Cat No.

: SA39967

Efinaconazole, Impurities

1-[[(2R,3S)-2-(2,4-Difluorophenyl)-3-methyloxiranyl]methyl]-1H-1,2,4-triazole

Please enquire for price & pack size

In Stock

CAS No.

: 127000-90-2

Mol F.

: C12H11F2N3O

Mol W.

: 251.23

Cat No.

: SA23618

Colesevelam, Impurities

1-Bromodecane

$70.00 25 mg

In Stock

CAS No.

: 112-29-8

Mol F.

: C10H21Br

Mol W.

: 221.18

Cat No.

: SA10215

Dapagliflozin, Impurities

1-Chloro-2-(4-ethoxybenzyl)benzene

$130.00 25 mg

In Stock

CAS No.

: 1662702-90-0

Mol F.

: C15H15ClO

Mol W.

: 246.73

Cat No.

: SA15016

Colesevelam, Impurities

1-Chlorordecane

Please enquire for price & pack size

In Stock

CAS No.

: 1002-69-3

Mol F.

: C10H21Cl

Mol W.

: 176.73

Cat No.

: SA10214

Colesevelam, Impurities

1-Hexanamine 6-bromo hydrobromide

$70.00 25 mg

In Stock

CAS No.

: 14502-76-2

Mol F.

: C6H14Br2N–

Mol W.

: 259.99

Cat No.

: SA10213

Edoxaban, Impurities

1-Hydroxylbenzotrizole

Please enquire for price & pack size

In Stock

CAS No.

: 2592-95-2

Mol F.

: C6H5N3O

Mol W.

: 135.12

Cat No.

: SA33048