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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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Glycopyrrolate, Impurities

Glycopyrrolate EP Impurity I

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CAS No.

: 1404453-68-4

Mol F.

: C19H27BrClNO3

Mol W.

: 432.78

Cat No.

: SA41907

Glycopyrrolate, Impurities

Glycopyrrolate EP Impurity J

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CAS No.

: 427-49-6

Mol F.

: C13H16O3

Mol W.

: 220.26

Cat No.

: SA41908

Glycopyrrolate, Impurities

Glycopyrrolate EP Impurity K

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CAS No.

: 3900-93-4

Mol F.

: C13H16O2

Mol W.

: 204.26

Cat No.

: SA41909

Glycopyrrolate, Impurities

Glycopyrrolate EP Impurity L

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CAS No.

: 19833-96-6

Mol F.

: C14H18O3

Mol W.

: 234.29

Cat No.

: SA41910

Glycopyrrolate, Impurities

Glycopyrrolate EP Impurity M

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CAS No.

: 5422-88-8

Mol F.

: C12H14O

Mol W.

: 174.24

Cat No.

: SA41911

Glycopyrrolate, Impurities

Glycopyrrolate EP Impurity N

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CAS No.

: 58493-54-2

Mol F.

: C19H28BrNO3

Mol W.

: 398.33

Cat No.

: SA41912

Glycopyrrolate, Impurities

Glycopyrrolate EP Impurity O

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CAS No.

: 618-88-2

Mol F.

: C8H5NO6

Mol W.

: 211.13

Cat No.

: SA41913

Glycopyrrolate, Impurities

Glycopyrrolate USP Releted Compound L

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CAS No.

: 19833-96-6

Mol F.

: C14H18O3

Mol W.

: 234.29

Cat No.

: SA41915

Guanine, Impurities

Guanine

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CAS No.

: 73-40-5

Mol F.

: C₅H₅N₅O

Mol W.

: 151.13

Cat No.

: SA32100

Halcinonide, Impurities

Halcinonide

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CAS No.

: 3093-35-4

Mol F.

: C₂₄H₃₂ClFO₅

Mol W.

: 454.96

Cat No.

: SA30400

Halcinonide, Impurities

Halcinonide ether dimer

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CAS No.

: NA

Mol F.

: C48H64F2O11

Mol W.

: 855.01

Cat No.

: SA30418

Diflorasone Acetate, Impurities

Halobetasol 2-chloro spiro Ketone Impurity

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CAS No.

: 912360-04-4

Mol F.

: C25H29ClF2O4

Mol W.

: 467.0

Cat No.

: SA44411

Diflorasone Acetate, Impurities

Halobetasol Dioxaspiro Impurity

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CAS No.

: 924726-88-5

Mol F.

: C27H36F2O6

Mol W.

: 494.6

Cat No.

: SA44410

Diflorasone Acetate, Impurities

Halobetasol Propionate EP impurity D

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CAS No.

: 66852-61-7

Mol F.

: C25H31Cl2FO5

Mol W.

: 501.4

Cat No.

: SA44405

Diflorasone Acetate, Impurities

Halobetasol Propionate Impurity B

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CAS No.

: 79861-38-4

Mol F.

: C27H34F2O7

Mol W.

: 508.55

Cat No.

: SA44408

Diflorasone Acetate, Impurities

Halobetasol Propionate Impurity C

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CAS No.

: 181527-42-4

Mol F.

: C25H31ClF2O5

Mol W.

: 484.96

Cat No.

: SA44407

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

Hydrocortisone EP Impurity A

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CAS No.

: 50-24-8

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA15202

Hydrocortisone, Impurities

Hydrocortisone EP Impurity I | CAS : 103795-84-2

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CAS No.

: 103795-84-2

Mol F.

: C21H30O6

Mol W.

: 378.5

Cat No.

: SA15233

Hydrocortisone, Impurities

Hydrocortisone EP Impurity O

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CAS No.

: 154032-37-8

Mol F.

: C21H30O6

Mol W.

: 378.5

Cat No.

: SA15236

Hydrocortisone Valerate, Impurities

Hydrocortisone Ortho Valerate

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CAS No.

: NA

Mol F.

: C27H40O6

Mol W.

: 460.6

Cat No.

: SA27315

Hydrocortisone, Impurities

Hydrocortisone Sodium Phosphate

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CAS No.

: 6000-74-4

Mol F.

: C21H29Na2O8P

Mol W.

: 486.40

Cat No.

: SA15234

Hydrocortisone, Impurities

Hydrocortisone Un-Symmetrical Dimer

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CAS No.

Mol F.

: C42H58O9

Mol W.

: 706.92

Cat No.

: SA15231

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

Empagliflozin, Impurities

Hydroxy Empagliflozin Impurity

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CAS No.

: 1279691-35-8

Mol F.

: C23H27ClO8

Mol W.

: 466.91

Cat No.

: SA15102

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, Permethrin

Hydroxy Permethrin Impurity

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CAS No.

: NA

Mol F.

: C21H20Cl2O4

Mol W.

: 407.3

Cat No.

: SA51930

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

Hydroxychloroquine, Impurities

Hydroxychloroquine EP Impurity C

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CAS No.

: 4298-15-1

Mol F.

: C16H22ClN3O

Mol W.

: 307.80

Cat No.

: SA23806

Hydroxychloroquine, Impurities

Hydroxychloroquine EP Impurity D

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CAS No.

: 1476-52-4

Mol F.

: C16H22ClN3

Mol W.

: 291.82

Cat No.

: SA23805

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

Hyoscine Butylbromide, Impurities

Hyoscine Butylbromide EP Impurity H

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CAS No.

: NA

Mol F.

: C21H32BrNO3

Mol W.

: 426.39

Cat No.

: SA46108