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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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Impurities, Neomycin

Hexa N-Boc Neomycin C

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CAS No.

: NA

Mol F.

: C53H94N6O25

Mol W.

: 1215.34

Cat No.

: SA51405

Hydrochlorothiazide, Impurities

Hydrochlorothiazide

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CAS No.

: 58-93-5

Mol F.

: C₇H₈ClN₃O₄S₂

Mol W.

: 297.74

Cat No.

: SA11200

Hydrochlorothiazide, Impurities

Hydrochlorothiazide EP Impurity C

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CAS No.

: 402824-96-8

Mol F.

: C₁₅H₁₆Cl₂N₆O₈S₄

Mol W.

: 607.49

Cat No.

: SA11202

Hydrocortisone, Impurities

Hydrocortisone

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CAS No.

: 50-23-7

Mol F.

: C21H30O5

Mol W.

: 362.46

Cat No.

: SA15200

Hydrocortisone, Impurities

Hydrocortisone 21-Propionate

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CAS No.

: 6677-98-1

Mol F.

: C₂₄H₃₄O₆

Mol W.

: 418.52

Cat No.

: SA15218

Hydrocortisone, Impurities

Hydrocortisone EP Impurity A

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CAS No.

: 50-24-8

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA15202

Hydrocortisone Valerate, Impurities

Hydrocortisone Ortho Valerate

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CAS No.

: NA

Mol F.

: C27H40O6

Mol W.

: 460.6

Cat No.

: SA27315

Aciclovir, Impurities

Hydroxy Aciclovir

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CAS No.

: 82410-32-0

Mol F.

: C9H13N5O4

Mol W.

: 255.23

Cat No.

: SA21424

Carisoprodol, Impurities

Hydroxy Carisoprodol

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CAS No.

: 3424-34-8

Mol F.

: C₁₂H₂₄N₂O₅

Mol W.

: 276.33

Cat No.

: SA25306

Glyburide, Impurities

Hydroxy Glyburide

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CAS No.

: 204838-24-4

Mol F.

: C₂₃H₂₈ClN₃O₆S

Mol W.

: 510

Cat No.

: SA12305

Donepezil, Impurities

Hydroxy Keto Donepezil Impurity

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CAS No.

: 197010-20-1

Mol F.

: C₂₄H₂₉NO₄

Mol W.

: 395.49

Cat No.

: SA34309

Celecoxib, Impurities

Hydroxy Methyl Celecoxib

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CAS No.

: 170571-00-3

Mol F.

: C₁₇H₁₄F₃N₃O₃S

Mol W.

: 397.37

Cat No.

: SA11311

Apixaban, Impurities

Hydroxy O-Demethyl Apixaban Sulfate

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CAS No.

: 2203515-00-6

Mol F.

: C24H23N5O8S

Mol W.

: 541.53

Cat No.

: SA39921

Impurities, Terbinafine

Hydroxy Terbinafine

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CAS No.

: 162227-13-6

Mol F.

: C21H25NO

Mol W.

: 307.43

Cat No.

: SA25710

Impurities, Terbinafine

Hydroxy Terbinafine Benzoate

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CAS No.

: 1076198-30-5

Mol F.

: C28H29NO2

Mol W.

: 411.54

Cat No.

: SA25711

Hydroxyzine, Impurities

Hydroxyzine

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CAS No.

: 68-88-2;2192-20-3(HClsalt)

Mol F.

: C21H27ClN2O2

Mol W.

: 374.9

Cat No.

: SA33800

Hydroxyzine, Impurities

Hydroxyzine Dimer

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CAS No.

: 346451-15-8;856841-95-7(HClsalt)

Mol F.

: C30H28Cl2N2

Mol W.

: 487.46

Cat No.

: SA33807

Hydroxyzine, Impurities

Hydroxyzine EP Impurity A

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CAS No.

: 303-26-4

Mol F.

: C17H19ClN2

Mol W.

: 286.8

Cat No.

: SA33801

Hydroxyzine, Impurities

Hydroxyzine EP Impurity B

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CAS No.

: 13073-96-6

Mol F.

: C21H28N2O2

Mol W.

: 340.46

Cat No.

: SA33802

Hydroxyzine, Impurities

Hydroxyzine Hydroxyethyl Ether

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CAS No.

: NA

Mol F.

: C23H31ClN2O3

Mol W.

: 418.95

Cat No.

: SA33805

Hydroxyzine, Impurities

Hydroxyzine N Oxide

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CAS No.

: NA

Mol F.

: C21H27ClN2O3

Mol W.

: 390.9

Cat No.

: SA33803

Hydroxyzine, Impurities

Hydroxyzine O- Acetyl Impurity2-(2-{4-[(4-Chlorophenyl)-phenylmethyl]piperazin-1-yl}ethoxy)ethyl acetate oxalate

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CAS No.

: NA

Mol F.

: C23H29ClN2O3

Mol W.

: 416.94

Cat No.

: SA33804

Hyoscine Butylbromide, Impurities

Hyoscine Butylbromide

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CAS No.

: 149-64-4

Mol F.

: C21H30BrNO4

Mol W.

: 440.37

Cat No.

: SA46100

Hyoscine Butylbromide, Impurities

Hyoscine Butylbromide EP Impurity A

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CAS No.

: 114-49-8 (anhydrate); 6533-68-2 (trihydrate)

Mol F.

: C17H28BrNO7

Mol W.

: 438.31

Cat No.

: SA46101

Hyoscine Butylbromide, Impurities

Hyoscine Butylbromide EP Impurity B

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CAS No.

: 552-63-6

Mol F.

: C9H10O3

Mol W.

: 166.17

Cat No.

: SA46102

Hyoscine Butylbromide, Impurities

Hyoscine Butylbromide EP Impurity G

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CAS No.

: 92714-23-3 (Bromide)

Mol F.

: C21H28BrNO3

Mol W.

: 422.36

Cat No.

: SA46107

Argatroban, Impurities

Hyrdoxy-Morpholine Argatroban

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CAS No.

: NA

Mol F.

: C23H36N6O6S

Mol W.

: 524.63

Cat No.

: SA48408

Ibrutinib, Impurities

Ibrutinib Amino piperidine Impurity

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CAS No.

: 1701403-10-2

Mol F.

: C22H24Cl2N6O

Mol W.

: 459.37

Cat No.

: SA47419

Ibrutinib, Impurities

Ibrutinib Di-piperidine Impurity

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CAS No.

: 2031255-23-7

Mol F.

: C50H48N12O4

Mol W.

: 881

Cat No.

: SA47408

Ibrutinib, Impurities

Ibrutinib Diamide Impurity

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CAS No.

: 1917333-91-5

Mol F.

: C28H26N6O3

Mol W.

: 494.6

Cat No.

: SA47402

Ibrutinib, Impurities

Ibrutinib Diamine Impurity

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CAS No.

: 1987905-93-0

Mol F.

: C47H46N12O3

Mol W.

: 827

Cat No.

: SA47407

Ibrutinib, Impurities

Ibrutinib Dimer Impurity

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CAS No.

: 2417548-76-4

Mol F.

: C50H48N12O4

Mol W.

: 880.99

Cat No.

: SA47415

Ibrutinib, Impurities

Ibrutinib Hydroxy Impurity

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CAS No.

: 2031255-24-8

Mol F.

: C25H23N5O3

Mol W.

: 441.5

Cat No.

: SA47404

Ibrutinib, Impurities

Ibrutinib Impurity D

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CAS No.

: 2052279-48-6

Mol F.

: C28H28N6O4

Mol W.

: 512.57

Cat No.

: SA47416

Ibrutinib, Impurities

Ibrutinib N-oxide | CAS : 2437254-47-0

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CAS No.

: 2437254-47-0

Mol F.

: C25H24N6O3

Mol W.

: 456.50

Cat No.

: SA47423

Ibuprofen, Impurities

Ibuprofen

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CAS No.

: 15687-27-1

Mol F.

: C₁₃H₁₈O₂

Mol W.

: 206.28

Cat No.

: SA30100

Ibuprofen, Impurities

Ibuprofen (R)-Isomer

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CAS No.

: 51146-57-7

Mol F.

: C₁₃H₁₈O₂

Mol W.

: 206.28

Cat No.

: SA30101

Ibuprofen, Impurities

Ibuprofen (S)-Isomer

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CAS No.

: 51146-56-6

Mol F.

: C₁₃H₁₈O₂

Mol W.

: 206.28

Cat No.

: SA30102

Ibuprofen, Impurities

Ibuprofen EP Impurity A

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CAS No.

: 66622-47-7

Mol F.

: C₁₃H₁₈O₂

Mol W.

: 206.28

Cat No.

: SA30103

Ibuprofen, Impurities

Ibuprofen EP Impurity B

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CAS No.

: 3585-49-7

Mol F.

: C₁₃H₁₈O₂

Mol W.

: 206.28

Cat No.

: SA30104

Ibuprofen, Impurities

Ibuprofen EP Impurity C

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CAS No.

: 59512-17-3

Mol F.

: C₁₃H₁₉NO

Mol W.

: 205.3

Cat No.

: SA30105

Ibuprofen, Impurities

Ibuprofen EP Impurity D

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CAS No.

: 938-94-3

Mol F.

: C₁₀H₁₂O₂

Mol W.

: 164.2

Cat No.

: SA30106

Ibuprofen, Impurities

Ibuprofen EP Impurity E

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CAS No.

: 38861-78-8

Mol F.

: C₁₂H₁₆O

Mol W.

: 176.25

Cat No.

: SA30107

Ibuprofen, Impurities

Ibuprofen EP Impurity F

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CAS No.

: 65322-85-2

Mol F.

: C₁₃H₁₈O₂

Mol W.

: 206.28

Cat No.

: SA30108

Ibuprofen, Impurities

Ibuprofen EP Impurity G

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CAS No.

: 1391054-15-1

Mol F.

: C₂₆H₃₂O₄

Mol W.

: 408.53

Cat No.

: SA30109

Ibuprofen, Impurities

Ibuprofen EP Impurity H

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CAS No.

: 2143535-25-3

Mol F.

: C24H32O

Mol W.

: 336.51

Cat No.

: SA30110

Ibuprofen, Impurities

Ibuprofen EP Impurity I

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CAS No.

: 2143535-26-4

Mol F.

: C24H34

Mol W.

: 322.53

Cat No.

: SA30111

Ibuprofen, Impurities

Ibuprofen EP Impurity J

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CAS No.

: 65813-55-0

Mol F.

: C₁₃H₁₆O₃

Mol W.

: 220.26

Cat No.

: SA30112

Ibuprofen, Impurities

Ibuprofen EP Impurity K

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CAS No.

: 43153-07-7

Mol F.

: C10H10O3

Mol W.

: 178.18

Cat No.

: SA30113

Ibuprofen, Impurities

Ibuprofen EP Impurity L

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CAS No.

: 53949-53-4

Mol F.

: C₁₃H₁₈O₃

Mol W.

: 222.28

Cat No.

: SA30114