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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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Impurities, Moxifloxacin

Moxifloxacin EP Impurity D

$495.00 25 mg

Out of Stock

CAS No.

: 1029364-77-9

Mol F.

: C21H24FN3O4

Mol W.

: 401.43

Cat No.

: SA30704

Impurities, Moxifloxacin

Moxifloxacin EP Impurity E

$195.00 25 mg

Out of Stock

CAS No.

: 721970-36-1; 1292904-74-5 (HCl salt)

Mol F.

: C₂₀H₂₂FN₃O₄

Mol W.

: 387.4

Cat No.

: SA30705

Impurities, Ritlecitinib

N-((3R,6S)-1,6-dimethylpiperidin-3-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C13H19N5

Mol W.

: 245.32

Cat No.

: SA50002

Impurities, Ritlecitinib

N-((3R,6S)-6-methylpiperidin-3-yl)-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidin-4-amine

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Out of Stock

CAS No.

Mol F.

: C12H19N5

Mol W.

: 233.31

Cat No.

: SA50003

Impurities, Ritlecitinib

N-((3R,6S)-6-methylpiperidin-3-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine hydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C12H18ClN5

Mol W.

: 267.76

Cat No.

: SA50004

Impurities, Nirmatrelvir

N-((S)-1-((1R,2S,5S)-2-Cyano-6,6-dimethyl-3-azabicyclo[3.1.0]hexan-3-yl)-3,3-dimethyl-1-oxobutan-2-yl)-2,2,2-trifluoroacetamide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C16H22F3N3O2

Mol W.

: 345.4

Cat No.

: SA46909

Impurities, Ranitidine

N-(1-(2-((5-((dimethylamino)methyl)furan-2-yl)methylthio)ethylamino)-2-nitrovinyl)-N-methylnitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C13H21N5O4S

Mol W.

: 343.4

Cat No.

: SA26521

Impurities, Ranitidine

N-(2-(((5-((dimethylamino)methyl)furan-2-yl)methyl)thio)ethyl)-N-(1-(methylamino)-2-nitrovinyl)nitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C13H21N5O4S

Mol W.

: 343.4

Cat No.

: SA26520

Impurities, Osimertinib

N-(2-((2-(Dimethylamino)ethyl)(methyl)amino)-4-methoxy-5-((4-(1-methyl-1H-indol-3-yl)pyrimidin-2-yl)amino)phenyl)-3-((2-((2-(dimethylamino)

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C53H64N14O3

Mol W.

: 945.19

Cat No.

: SA44703

Impurities, Osimertinib

N-(2-((2-(dimethylamino)ethyl)(methyl)amino)-4-methoxy-5-(4-(1-methyl-1H-indol-3-yl)pyrimidin-2-ylamino)phenyl)-N-(3-(2-((2-(dimethylamino)

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C56H66N14O4

Mol W.

: 999.24

Cat No.

: SA44704

Impurities, Osimertinib

N-(2-((2-acrylamido-5-methoxy-4-(4-(1-methyl-1H-indol-3-yl)pyrimidin-2-ylamino)phenyl)(methyl)amino)ethyl)-3-(2-((2-(dimethylamino)ethyl)(m

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C56H67ClN14O4

Mol W.

: 1035.7

Cat No.

: SA44705

Impurities, Nitrosamine

N-(2-aminoethyl)-N-(2-((2-aminoethyl)amino)ethyl)nitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C6H17N5O

Mol W.

: 175.24

Cat No.

: SA44678

Impurities, Pazopanib

N-(2-Methoxypyrimidin-4-yl)-2,3-dimethyl-2H-indazol-6-amine

Please enquire for price & pack size

Out of Stock

CAS No.

: 2369664-16-2

Mol F.

: C14H15N5O

Mol W.

: 269.3

Cat No.

: SA51314

Diclofenac, Impurities

N-(2,6-Dichlorophenyl)aniline

Please enquire for price & pack size

Out of Stock

CAS No.

: 15307-93-4

Mol F.

: C₁₂H₉Cl₂N

Mol W.

: 238.11

Cat No.

: SA12708

Impurities, Ranolazine

N-(2,6-Dimethylphenyl)-2,2-dichloroacetamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 39084-88-3

Mol F.

: C10H11Cl2NO

Mol W.

: 232.11

Cat No.

: SA26816

Clonixin, Impurities

N-(3-Chloro-2-methylphenyl)-2-hydroxynicotinamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 72646-00-5

Mol F.

: C13H11ClN2O2

Mol W.

: 262.69

Cat No.

: SA38003

Cinnarizine, Impurities

N-(3-Phenyl)-2-propenyl Cinnarizine Chloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 95062-18-3

Mol F.

: C₃₅H₃₅ClF₂N₂

Mol W.

: 557.12

Cat No.

: SA12406

Etravirine, Impurities

N-(4-Amino-5-bromo-6-(4-cyano-2, 6-dimethylphenoxy)pyrimidin-2-yl)-N-(4-cyanophenyl)nitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H14BrN7O2

Mol W.

: 464.27

Cat No.

: SA26114

Brexpiprazole, Impurities

N-(4-Bromobutyl)-7-(4-bromobutoxy)-quinoline-2(1H)-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 1076199-56-8

Mol F.

: C17H21Br2NO2

Mol W.

: 431.16

Cat No.

: SA41338

Etravirine, Impurities

N-(4-Cyanophenyl)guanidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 5637-42-3

Mol F.

: C8H8N4

Mol W.

: 160.18

Cat No.

: SA26106

Brimonidine, Impurities

N-(4,5-Dihydro-1H-imidazol-2-yl)-5-methyl-6-quinolinamine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1217439-06-9

Mol F.

: C13H14N4

Mol W.

: 226.28

Cat No.

: SA20722

Impurities, Rosuvastatin

N-(5-(hydroxymethyl)-4-isopropyl-6-phenylpyrimidin-2-yl)-N-methylmethanesulfonamide

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H21N3O3S

Mol W.

: 335.42

Cat No.

: SA121120

Impurities, Palbociclib

N-(5-(piperazin-1-yl)pyridin-2-yl)hydroxylamine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C9H14N4O

Mol W.

: 194.24

Cat No.

: SA40434

Impurities, Rosuvastatin

N-(5-formyl-4-isopropyl-6-phenylpyrimidin-2-yl)-N-methylmethanesulfonamide

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H19N3O3S

Mol W.

: 333.41

Cat No.

: SA121122

Impurities, Palbociclib

N-(6-acetyl-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)-N-(5-(4-nitrosopiperazin-1-yl)pyridin-2-yl)nitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H27N9O4

Mol W.

: 505.53

Cat No.

: SA40425

Dorzolamide, Impurities

N-(6-Methyl-7,7-dioxido-2-sulfamoyl-5,6-dihydro-4H-thieno[2,3-b]thiopyran-4-yl)acetamide (C10H14N2O5S3) [338.4236 amu]

Please enquire for price & pack size

Out of Stock

CAS No.

: 120298-38-6

Mol F.

: C10H14N2O5S3

Mol W.

: 338.42

Cat No.

: SA24120

Brimonidine, Impurities

N-(8-Bromo-6-quinoxalinyl)thiourea

Please enquire for price & pack size

Out of Stock

CAS No.

: 1217439-05-8

Mol F.

: C9H7BrN4S

Mol W.

: 283.15

Cat No.

: SA20720

Impurities, Nitrosamine

N-[(2E)-6,6-Dimethyl- 2-hepten-4-yn-1-yl]- N-nitrosomethanamine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C10H16N2O

Mol W.

: 180.25

Cat No.

: SA446106

Impurities, Rosuvastatin

N-[(6S)-8-Fluoro-5,6-dihydro-4-(1-methylethyl)-6-[(2S,4S)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]benzo[h]quinazolin-2-yl]-N-methylmethanesulfonamide

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C22H26FN3O5S

Mol W.

: 463.52

Cat No.

: SA12168

Impurities, Nizatidine

N-[2[[[2-[(dimethylamino)methyl]-4-thiazolyl]methyl]thio]ethyl]-2-nitro-1-thiomethyl etheneamine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C12H18N4O2S3

Mol W.

: 346.5

Cat No.

: SA34417

Abacavir, Impurities

N-[4,6-Dichloro-5-(formylamino)-2-pyrimidinyl]acetamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 136470-91-2

Mol F.

: C7H6Cl2N4O2

Mol W.

: 249.05

Cat No.

: SA18111

Cariprazine, Impurities

N-[trans-4-(2-Oxoethyl)cyclohexyl]carbamic Acid 1,1-Dimethylethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 215790-29-7

Mol F.

: CƒH‚ƒNOƒ

Mol W.

: 241.33

Cat No.

: SA39709

Gabapentin, Impurities

N-3-oxobutyl Gabapentin lactum

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C₁₃H₂₁NO₂

Mol W.

: 223.31

Cat No.

: SA22817

Efavirenz, Impurities

N-4-methoxypheny open ring Efavirenz

Please enquire for price & pack size

Out of Stock

CAS No.

: 173676-60-3

Mol F.

: C₂₁H₁₉ClF₃NO₂

Mol W.

: 409.83

Cat No.

: SA17611

Impurities, Linezolid

N-acetyl -(3-(3-fluoro-4-morpholinophenylamino)propyl)-N-(((S3(3-fluoro-4-morpholionphenyl)-2-oxo-5-oxazolidinyl)methyl)amine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C29H37F2N5O5

Mol W.

: 573.63

Cat No.

: SA17505

Clonidine, Impurities

N-Acetyl Clonidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 54707-71-0

Mol F.

: C11H11Cl2N3O

Mol W.

: 272.13

Cat No.

: SA42503

Fingolimod, Impurities

N-Acetyl Diethyl Ester Fingolimod Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 162358-08-9

Mol F.

: C25H39NO5

Mol W.

: 433.58

Cat No.

: SA34514

Dorzolamide, Impurities

N-Acetyl Dorzolamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 403848-09-9

Mol F.

: C12H18N2O5S3

Mol W.

: 366.48

Cat No.

: SA24115

Impurities, Penciclovir

N-acetyl esterified Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C16H20ClN5O5

Mol W.

: 397.81

Cat No.

: SA27709

Ganciclovir, Impurities

N-Acetyl-di-O-acetyl Ganciclovir

Please enquire for price & pack size

Out of Stock

CAS No.

: 86357-14-4

Mol F.

: C₁₅H₁₉N₅O₇

Mol W.

: 381.34

Cat No.

: SA13704

Impurities, Linagliptin

N-Aminoacyl Linagliptin

Please enquire for price & pack size

Out of Stock

CAS No.

: 2983074-55-9

Mol F.

: C26H29N9O3

Mol W.

: 515.6

Cat No.

: SA49918

Impurities, Lenalidomide

N-Aminopropanoyl Lenalidomide Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C16H18N4O4

Mol W.

: 330.34

Cat No.

: SA34106

Impurities, Sitagliptin

N-Benzyl carbamate Sitagliptin

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C24H19F6N5O4

Mol W.

: 555.43

Cat No.

: SA10430

Ciprofloxacin, Impurities

N-Benzyl Ciprofloxacin Benzyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 1391052-64-4

Mol F.

: C31h30FN3O3

Mol W.

: 511.59

Cat No.

: SA42009

Impurities, Nitrosamine

N-Benzyl-N-ethylnitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

: 20689-96-7

Mol F.

: C9H12N2O

Mol W.

: 164.2

Cat No.

: SA44695

Impurities, Isavuconazole

N-Boc Isavuconazonium Impurity

$400.00 25 mg

Out of Stock

CAS No.

: 338990-63-9; 741241-71-4 (free base); 338990-64-0 (Iodide salt)

Mol F.

: C40H43ClF2N8O7S

Mol W.

: 853.33

Cat No.

: SA44116

Impurities, Venlafaxine

N-Boc N,O-Didesmethylvenlafaxine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1076199-24-0

Mol F.

: C20H31NO4

Mol W.

: 349.46

Cat No.

: SA22721

Impurities, Saxagliptin

N-Boc-L-cis-4,5-Methanoprolineamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 361440-67-7

Mol F.

: C11H18N2O3

Mol W.

: 226.27

Cat No.

: SA27401

Brexpiprazole, Impurities

N-butyl bromide Quinolinone

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C13H14BrNO2

Mol W.

: 296.16

Cat No.

: SA41309

Eslicarbazepine, Impurities

N-Carbamoyl Oxcarbazepine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H13N3O3

Mol W.

: 295.29

Cat No.

: SA28804