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Impurities

SynThink is a producer and supplier of a number of pharmaceutical Reference Standards (Impurity Standards) which are required for pharmaceutical companies to study quality, stability and biological safety of pharmaceutical products. Many API Impurities are available in our stock.

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Halcinonide, Impurities

21-oxy-1-propanol Halcinonide

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Out of Stock

CAS No.

: NA

Mol F.

: C27H39FO7

Mol W.

: 494.59

Cat No.

: SA30417

Halcinonide, Impurities

21-oxy-2-propanol Halcinonide

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Out of Stock

CAS No.

: NA

Mol F.

: C27H39FO7

Mol W.

: 494.59

Cat No.

: SA30416

Budesonide, Impurities

22R-6β-Hydroxy Budesonide

$895.00 25 mg

Out of Stock

CAS No.

: 93861-52-0

Mol F.

: C25H34O7

Mol W.

: 446.53

Cat No.

: SA14129

Budesonide, Impurities

22S-6β-Hydroxy Budesonide

$895.00 25 mg

Out of Stock

CAS No.

: 93861-51-9

Mol F.

: C25H34O7

Mol W.

: 446.53

Cat No.

: SA14124

Impurities, Isavuconazole

2R,3S-Isavuconazole

$1,550.00 25 mg

Out of Stock

CAS No.

Mol F.

: C22H17F2N5OS

Mol W.

: 437.5

Cat No.

: SA44109

Impurities, Isavuconazole

2R,3S-Isavuconazonium Impurity

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Out of Stock

CAS No.

Mol F.

: C35H35ClF2N8O5S

Mol W.

: 753.22

Cat No.

: SA44117

Impurities, Isavuconazole

2S,3R-Isavuconazole

$1,550.00 25 mg

Out of Stock

CAS No.

: 1176988-44-5

Mol F.

: C22H17F2N5OS

Mol W.

: 437.5

Cat No.

: SA44108

Impurities, Isavuconazole

2S,3R-Isavuconazonium Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C35H35ClF2N8O5S

Mol W.

: 753.22

Cat No.

: SA44118

Impurities, Isavuconazole

2S,3S-Isavuconazole

$1,550.00 25 mg

In Stock

CAS No.

Mol F.

: C22H17F2N5OS

Mol W.

: 437.5

Cat No.

: SA44110

Impurities, Isavuconazole

2S,3S-Isavuconazonium Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C35H35ClF2N8O5S

Mol W.

: 753.22

Cat No.

: SA44119

Impurities, Zidovudine

2α-Hydroxy Zidovudine

Please enquire for price & pack size

Out of Stock

CAS No.

: 215176-58-2

Mol F.

: C10H13N5O5

Mol W.

: 283.24

Cat No.

: SA12608

Impurities, Sitagliptin

3-(((Benzyloxy)carbonyl)amino)-4-(2,4,5-trifluorophenyl)butanoic Acid

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Out of Stock

CAS No.

Mol F.

: C18H16F3NO4

Mol W.

: 367.32

Cat No.

: SA10432

Cariprazine, Impurities

3-((1r,4r)-4-(2-(4-(3,4-dichlorophenyl)piperazin-1-yl)ethyl)cyclohexyl)-1,1-dimethylurea

Please enquire for price & pack size

Out of Stock

CAS No.

: 1378235-50-7

Mol F.

: C21H32Cl2N4O

Mol W.

: 427.41

Cat No.

: SA39715

Cariprazine, Impurities

3-((cis)-4-(2-(4-(2,3-dichlorophenyl) piperazin-1-yl)ethyl) cyclohexyl)-1,1-dimethylurea

Please enquire for price & pack size

Out of Stock

CAS No.

: 1480744-38-4

Mol F.

: C21H32Cl2N4O

Mol W.

: 427.41

Cat No.

: SA39710

Carbamazepine, Impurities

3-((tert-Butyldimethylsilyl)oxy)-5H-dibenzo[b,f]azepine

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C20H25NOSi

Mol W.

: 323.5

Cat No.

: SA20334

Impurities, Neostigmine

3-(1,3,3-dimethylureido)phenyl dimethylcarbamate

Please enquire for price & pack size

Out of Stock

CAS No.

: 2434689-89-9

Mol F.

: C13H19N3O3

Mol W.

: 265.31

Cat No.

: SA19710

Impurities, Ribociclib

3-(2-((2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidin-6-yl)methoxy)-4-(cyclopentylamino)pyrimidin-5-yl)prop-2-yn-1-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H27ClN6O2

Mol W.

: 467

Cat No.

: SA47114

Impurities, Ribociclib

3-(2-((3-(2-chloro-4-(cyclopentylamino)pyrimidin-5-yl)prop-2-yn-1-yl)oxy)-4-(cyclopentylamino)pyrimidin-5-yl)prop-2-yn-1-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H27ClN6O2

Mol W.

: 467

Cat No.

: SA47116

Empagliflozin, Impurities

3-(2-(5-Bromo-2-chlorobenzyl)phenoxy)tetrahydrofuran

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C17H16BrClO2

Mol W.

: 367.66

Cat No.

: SA15154

Impurities, Pregabalin

3-(2-Amino-2-oxoethyl)-5-methylhexanoic Acid

$95.00 25 mg

Out of Stock

CAS No.

: 181289-15-6

Mol F.

: C9H17NO3

Mol W.

: 187.24

Cat No.

: SA24822

Impurities, Ribociclib

3-(2-Chloro-4-(cyclopentylamino)pyrimidin-5-yl)prop-2-yn-1-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1374639-76-5

Mol F.

: C12H14ClN3O

Mol W.

: 251.7

Cat No.

: SA47123

Impurities, Osimertinib

3-(2-Chloropyrimidin-4-yl)-1-methylindole

Please enquire for price & pack size

Out of Stock

CAS No.

: 1032452-86-0

Mol F.

: C13H10ClN3

Mol W.

: 243.69

Cat No.

: SA44702

Impurities, Ranolazine

3-(2-methoxyphenoxy)propane-1,2-diol

Please enquire for price & pack size

Out of Stock

CAS No.

: 93-14-1

Mol F.

: C10H14O4

Mol W.

: 198.22

Cat No.

: SA26809

Impurities, Pregabalin

3-(2-Methylpropyl)pentanedioic Acid

$75.00 25 mg

Out of Stock

CAS No.

: 75143-89-4

Mol F.

: C9H16O4

Mol W.

: 188.22

Cat No.

: SA24807

Gemcitabine, Impurities

3-(2,2-Dimethyl[1,3]dioxolan-4-yl)-2,2-difluora-3-hydroxy-propionic acid ethyl ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 95058-92-7

Mol F.

: C10H16F2O5

Mol W.

: 254.23

Cat No.

: SA44501

Impurities, Neostigmine

3-(3,3-dimethylureido)phenyl dimethylcarbamate

Please enquire for price & pack size

Out of Stock

CAS No.

: 4939-59-7

Mol F.

: C12H17N3O3

Mol W.

: 251.28

Cat No.

: SA19712

Empagliflozin, Impurities

3-(4-(2,5-Dibromobenzyl)phenoxy)tetrahydrofuran

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C17H16Br2O2

Mol W.

: 412.12

Cat No.

: SA15153

Baclofen, Impurities

3-(4-Chlorophenyl) Glutarimide

Please enquire for price & pack size

Out of Stock

CAS No.

: 84803-46-3

Mol F.

: C11H10ClNO2

Mol W.

: 223.65

Cat No.

: SA28105

Baclofen, Impurities

3-(4-Chlorophenyl)-4-hydroxybutyric Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 52977-95-4

Mol F.

: C10H11ClO3

Mol W.

: 214.64

Cat No.

: SA28111

Baclofen, Impurities

3-(4-chlorophenyl)glutaric anhydride

Please enquire for price & pack size

Out of Stock

CAS No.

: 53911-68-5

Mol F.

: C11H9ClO3

Mol W.

: 224.64

Cat No.

: SA28106

Impurities, Nitrofurantoin

3-(5-Nitrofurfurylideneamino)hydantoic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 63981-22-6

Mol F.

: CˆHˆN„O†

Mol W.

: 256.17

Cat No.

: SA39805

Ethinylestradiol, Impurities

3-(Acetyloxy)-1-methylestra-1,3,5(10),6-tetraen-17-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 53-55-4

Mol F.

: C21H24O3

Mol W.

: 324.41

Cat No.

: SA13130

Impurities, Pregabalin

3-(Aminomethyl)-5-methyl-hexanoic Acid Phenylmethyl Ester Hydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 649748-11-8(HCl);1480521-53-6(Base)

Mol F.

: C15H2NO2.HCl

Mol W.

: 285.81

Cat No.

: SA24823

Impurities, Pregabalin

3-(Bis((S)-4-isobutyl-2-oxopyrrolidin-1-yl)methyl)-5-methylhexanoic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H42N2O4

Mol W.

: 422.6

Cat No.

: SA24809

Impurities, Pitavastatin

3-(Bromomethyl)-2-cyclopropyl-4-(4-fluorophenyl)quinoline

Please enquire for price & pack size

Out of Stock

CAS No.

: 154057-56-4

Mol F.

: C19H15BrFN

Mol W.

: 356.23

Cat No.

: SA29523

Impurities, Neostigmine

3-(tert-Butyldimethylsilyloxy)aniline

Please enquire for price & pack size

Out of Stock

CAS No.

: 121942-75-4

Mol F.

: C12H21NOSi

Mol W.

: 223.39

Cat No.

: SA19708

Impurities, Sitagliptin

3-(Trifluoromethyl)-6,7-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-8(5H)-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 877402-45-4

Mol F.

: C6H5F3N4O

Mol W.

: 206.13

Cat No.

: SA10439

Impurities, Tofacitinib

3-[(3R,4R)-4-methyl-3-[methyl({7H-pyrrolo[2,3-d]pyrimidin-4-yl})amino]piperidin-1-yl]3-oxopropanenitrile-N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C16H20N6O2

Mol W.

: 328.38

Cat No.

: SA43309

Impurities, Pregabalin

3-[[[(1,1-Dimethylethoxy)carbonyl]amino]methyl]-5-methyl-hexanoic Acid Phenylmethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 1990538-01-6

Mol F.

: C20H31NO4

Mol W.

: 349.46

Cat No.

: SA24835

Impurities, Pregabalin

3-[[[(1,1-Dimethylethoxy)carbonyl]amino]methyl]-5-methylhexanoic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 228104-41-4

Mol F.

: C13H25NO4

Mol W.

: 259.33999999999997

Cat No.

: SA24834

Impurities, Pregabalin

3-[[[3-(Aminomethyl)-5-methyl-1-oxohexyl]amino]methyl]-5-methyl-hexanoic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 1486961-58-3

Mol F.

: C16H32N2O3

Mol W.

: 300.83999999999997

Cat No.

: SA24824

Impurities, Pregabalin

3-[[[3-[[[(1,1-Dimethylethoxy)carbonyl]amino]methyl]-5-methyl-1-oxohexyl]amino]methyl]-5-methyl-hexanoic Acid Phenylmethyl

Please enquire for price & pack size

Out of Stock

CAS No.

: 1990538-02-7

Mol F.

: C28H46N2O5

Mol W.

: 490.68

Cat No.

: SA24833

Empagliflozin, Impurities

3-{4-[2-chloro-5-(tetrahydrofuran-3-yloxy)benzyl]phenoxy}tetrahydrofuran

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C21H23ClO4

Mol W.

: 374.86

Cat No.

: SA15149

Decitabine, Impurities

3-acetoxy-5-methoxy-tetrahydrofuran-2-yl methyl ester Acetic acid

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C10H16O6

Mol W.

: 232.23

Cat No.

: SA42214

Aspirin, Impurities

3-Acetoxybenzoic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 6304-89-8

Mol F.

: C9H8O4

Mol W.

: 180.16

Cat No.

: SA28503

Impurities, Linagliptin

3-Aminopiperidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 54012-73-6

Mol F.

: C5H12N2

Mol W.

: 100.16

Cat No.

: SA49917

Dolutegravir, Impurities

3-Benzyloxy-2-(2-hydroxy-2-phenylethyl)-4H-pyran-4-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 1206102-04-6

Mol F.

: C20H18O4

Mol W.

: 322.35

Cat No.

: SA20214

Impurities, Zolpidem

3-Bromo Zolpidem

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C19H20BrN3O

Mol W.

: 386.31

Cat No.

: SA43010

Dolutegravir, Impurities

3-Bromo-1-(2,2-dimethoxyethyl)-1,4-dihydro-4-oxo-2,5-pyridinedicarboxylic Acid 2,5-Diethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 1246616-76-1

Mol F.

: C15H20BrNO7

Mol W.

: 406.23

Cat No.

: SA20216

Apixaban, Impurities

3-Carbamoyl-1-(4-methoxyphenyl)-4-(2-((4-(2-oxopiperidin-1-yl)phenyl)amino)ethyl)-1H-pyrazole-5-carboxylic acid, potassium salt

Please enquire for price & pack size

Out of Stock

CAS No.

: 2206825-81-0 (Free salt)

Mol F.

: C25H26KN5O5

Mol W.

: 515.6

Cat No.

: SA39947