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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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Dapoxetine, Impurities

Dapoxetine

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Out of Stock

CAS No.

: 119356-77-3; 129938-20-1 (HCl)

Mol F.

: C21H24ClNO

Mol W.

: 341.87

Cat No.

: SA23000

Dapoxetine, Impurities

Dapoxetine (R)-Hydroxy Impurity

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Out of Stock

CAS No.

: 156453-53-1

Mol F.

: C19H18O2

Mol W.

: 278.35

Cat No.

: SA23015

Dapoxetine, Impurities

Dapoxetine Azide Analogue

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Out of Stock

CAS No.

: 1776071-89-6

Mol F.

: C19H17N3O

Mol W.

: 303.36

Cat No.

: SA23004

Dapoxetine, Impurities

Dapoxetine Keto Impurity

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Out of Stock

CAS No.

: 41198-42-9

Mol F.

: C19H16O2

Mol W.

: 276.33

Cat No.

: SA23014

Dapoxetine, Impurities

Dapoxetine N-Oxide Impurity

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Out of Stock

CAS No.

: 1346603-24-4

Mol F.

: C21H23NO2

Mol W.

: 321.41

Cat No.

: SA23002

Dapoxetine, Impurities

Dapoxetine Styryl Analogue

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Out of Stock

CAS No.

: 1091626-77-5

Mol F.

: C19H16O

Mol W.

: 260.33

Cat No.

: SA23003

Dapsone, Impurities

Dapsone

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Out of Stock

CAS No.

: 80-08-0

Mol F.

: C12H12N2O2S

Mol W.

: 248.3

Cat No.

: SA27000

Dapsone, Impurities

Dapsone Aniline Chlorophenyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 7146-68-1

Mol F.

: C12H10ClNO2S

Mol W.

: 267.73

Cat No.

: SA27001

Dapsone, Impurities

Dapsone Aniline Impurity

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Out of Stock

CAS No.

: 7019-01-4

Mol F.

: C12H11NO2S

Mol W.

: 233.29

Cat No.

: SA27002

Dapsone, Impurities

Dapsone Aniline Phenol Impurity

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Out of Stock

CAS No.

: 25963-47-7

Mol F.

: C12H11NO3S

Mol W.

: 249.29

Cat No.

: SA27003

Dapsone, Impurities

Dapsone Chlorophenyl Impurity

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Out of Stock

CAS No.

: 80-00-2

Mol F.

: C12H9ClO2S

Mol W.

: 252.72

Cat No.

: SA27004

Dapsone, Impurities

Dapsone Ether Dimer Impurity

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Out of Stock

CAS No.

: 54616-64-7

Mol F.

: C24H20N2O5S2

Mol W.

: 480.56

Cat No.

: SA27005

Dapsone, Impurities

Dapsone Hydrazine Dimer Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H22N4O4S2

Mol W.

: 494.59

Cat No.

: SA27006

Dapsone, Impurities

Dapsone N-Acetyl Impurity

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Out of Stock

CAS No.

: 565-20-8

Mol F.

: C14H14N2O3S

Mol W.

: 290.34

Cat No.

: SA27007

Dapsone, Impurities

Dapsone N-Acetyl N-Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 32604-86-7

Mol F.

: C14H14N2O4S

Mol W.

: 306.34

Cat No.

: SA27008

Dapsone, Impurities

Dapsone N-Hydroxy Impurity

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Out of Stock

CAS No.

: 32695-27-5

Mol F.

: C12H12N2O3S

Mol W.

: 264.3

Cat No.

: SA27009

Dapsone, Impurities

Dapsone Ortho-Amino Isomer

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Out of Stock

CAS No.

: 27147-69-9

Mol F.

: C12H12N2O2S

Mol W.

: 248.3

Cat No.

: SA27010

Darifenacin, Impurities

Darifenacin

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Out of Stock

CAS No.

: 133099-04-4; 133099-07-7 (HBr)

Mol F.

: C28H31BrN2O2

Mol W.

: 507.46

Cat No.

: SA43500

Darifenacin, Impurities

Darifenacin 2,3-Dehydro Bromo Impurity

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Out of Stock

CAS No.

: NA

Mol F.

: C10H9BrO

Mol W.

: 225.08

Cat No.

: SA43518

Darifenacin, Impurities

Darifenacin 3-Hydroxy Impurity

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Out of Stock

CAS No.

: 206048-82-0

Mol F.

: C28H30N2O3

Mol W.

: 442.55

Cat No.

: SA43502

Darifenacin, Impurities

Darifenacin 5-Bromoethyl Impurity

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Out of Stock

CAS No.

: 127264-14-6

Mol F.

: C10H11BrO

Mol W.

: 227.1

Cat No.

: SA43511

Darifenacin, Impurities

Darifenacin 5-Carboxymethyl Impurity

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Out of Stock

CAS No.

: 69999-16-2

Mol F.

: C10H10O3

Mol W.

: 178.18

Cat No.

: SA43512

Darifenacin, Impurities

Darifenacin 7-Bromo Analog

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Out of Stock

CAS No.

: 1391080-43-5

Mol F.

: C28H30Br2N2O2

Mol W.

: 586.36

Cat No.

: SA43507

Darifenacin, Impurities

Darifenacin Amide Dimer Impurity

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Out of Stock

CAS No.

: NA

Mol F.

: C38H40N2O3

Mol W.

: 572.74

Cat No.

: SA43515

Darifenacin, Impurities

Darifenacin Amide ethyl Benzofuran Isomer

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Out of Stock

CAS No.

: NA

Mol F.

: C28H30N2O2

Mol W.

: 426.55

Cat No.

: SA43519

Darifenacin, Impurities

Darifenacin Bis Dimer Impurity

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Out of Stock

CAS No.

: NA

Mol F.

: C38H40N2O3

Mol W.

: 572.74

Cat No.

: SA43516

Darifenacin, Impurities

Darifenacin Carboxylic Acid

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Out of Stock

CAS No.

: NA

Mol F.

: C28H30BrNO3

Mol W.

: 508.45

Cat No.

: SA43508

Darifenacin, Impurities

Darifenacin Cyano Pyrrolidine Impurity

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Out of Stock

CAS No.

: 133099-11-3; 194602-27-2 (HBr)

Mol F.

: C18H19BrN2

Mol W.

: 343.26

Cat No.

: SA43520

Darifenacin, Impurities

Darifenacin Cyano t-BOC Impurity

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Out of Stock

CAS No.

: 1159977-31-7

Mol F.

: C23H26NO2

Mol W.

: 362.46

Cat No.

: SA43513

Darifenacin, Impurities

Darifenacin Dehydro Impurity

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Out of Stock

CAS No.

: 943034-52-4

Mol F.

: C28H29BrN2O2

Mol W.

: 505.45

Cat No.

: SA43514

Darifenacin, Impurities

Darifenacin Methanesulfonate Impurity

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Out of Stock

CAS No.

: NA

Mol F.

: C11H14O4S

Mol W.

: 242.29

Cat No.

: SA43506

Darifenacin, Impurities

Darifenacin N oxide

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Out of Stock

CAS No.

: 1391080-40-2

Mol F.

: C28H30N2O3

Mol W.

: 442.55

Cat No.

: SA43509

Darifenacin, Impurities

Darifenacin Nitrile Impurity

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Out of Stock

CAS No.

: 252317-48-9 (base)

Mol F.

: C28H28N2O

Mol W.

: 408.53

Cat No.

: SA43505

Darifenacin, Impurities

Darifenacin Pyrrolidine Carboxylic Acid

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Out of Stock

CAS No.

: NA

Mol F.

: C18H19NO2

Mol W.

: 281.35

Cat No.

: SA43510

Darifenacin, Impurities

Darifenacin Pyrrolidinium Dimer

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Out of Stock

CAS No.

: 1397321-17-3; 1396968-57-2 (HBr)

Mol F.

: C38H41BrN2O3

Mol W.

: 653.65

Cat No.

: SA43503

Darifenacin, Impurities

Darifenacin R-Isomer

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Out of Stock

CAS No.

: NA

Mol F.

: C28H31BrN2O2

Mol W.

: 507.46

Cat No.

: SA43517

Darifenacin, Impurities

Darifenacin Vinyl Impurity

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Out of Stock

CAS No.

: 1048979-09-4

Mol F.

: C28H30N2O2

Mol W.

: 426.55

Cat No.

: SA43504

Darunavir, Impurities

Darunavir

Please enquire for price & pack size

Out of Stock

CAS No.

: 206361-99-1

Mol F.

: C27H37N3O7S

Mol W.

: 547.66

Cat No.

: SA39400

Darunavir, Impurities

Darunavir (1R,2R)-Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 1546918-95-9

Mol F.

: C27H37N3O7S

Mol W.

: 547.66

Cat No.

: SA39405

Darunavir, Impurities

Darunavir (1R,2S)-Isomer

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Out of Stock

CAS No.

: 1402142-63-5

Mol F.

: C27H37N3O7S

Mol W.

: 547.66

Cat No.

: SA39404

Darunavir, Impurities

Darunavir (1S,2S)-Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 850141-19-4

Mol F.

: C27H37N3O7S

Mol W.

: 547.66

Cat No.

: SA39406

Darunavir, Impurities

Darunavir Carbamic Acid Impurity

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Out of Stock

CAS No.

: 1526916-56-2

Mol F.

: C21H29N3O5S

Mol W.

: 435.54

Cat No.

: SA39402

Darunavir, Impurities

Darunavir Carbamic Acid Methyl Ester

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Out of Stock

CAS No.

: 1526916-57-3

Mol F.

: C22H31N3O5S

Mol W.

: 449.56

Cat No.

: SA39403

Darunavir, Impurities

Darunavir Diamino (2R,3S) Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 169280-56-2

Mol F.

: C20H29N3O3S

Mol W.

: 391.53

Cat No.

: SA39401

Darunavir, Impurities

Darunavir Imp. 19 (DN-Sulphonamide SR isomer)

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Out of Stock

CAS No.

: 1402142-62-4

Mol F.

: C20H29N3O3S

Mol W.

: 391.53

Cat No.

: SA39410

Dasatinib, Impurities

Dasatinib

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Out of Stock

CAS No.

: 302962-49-8

Mol F.

: C‚‚H‚†ClN‡O‚S

Mol W.

: 488.01

Cat No.

: SA40500

Dasatinib, Impurities

Dasatinib Carboxylic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 910297-53-9

Mol F.

: C22H24ClN7O3S

Mol W.

: 501.99

Cat No.

: SA40501

Dasatinib, Impurities

Dasatinib Carboxylic Acid Ethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 910297-62-0

Mol F.

: C‚„H‚ˆClN‡OƒS

Mol W.

: 530.04

Cat No.

: SA40508

Dasatinib, Impurities

Dasatinib Deschloro Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1184919-23-0

Mol F.

: C‚‚H‚‡N‡O‚S

Mol W.

: 453.56

Cat No.

: SA40502

Dasatinib, Impurities

Dasatinib Dichloro Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 302964-08-5

Mol F.

: C16H13ClN5OS

Mol W.

: 394.28

Cat No.

: SA40506