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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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Carisoprodol, Impurities

Dehydro Carisoprodol

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CAS No.

: NA

Mol F.

: C₁₂H₂₂N₂O₄

Mol W.

: 258.31

Cat No.

: SA25305

Donepezil, Impurities

Dehydro Deoxy Donepezil Impurity

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CAS No.

: 120013-45-8

Mol F.

: C24H29NO2

Mol W.

: 363.49

Cat No.

: SA34311

Chlorpromazine, Impurities

Dehydro Desipramine impurity | CAS : 2010-13-1

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CAS No.

: 2010-13-1

Mol F.

: C18H21ClN2

Mol W.

: 300.83

Cat No.

: SA21619

Impurities, Olmesartan Medoxomil

Dehydro N2-Triphenylmethyl Olmesartan

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CAS No.

: 1797891-24-7

Mol F.

: C₄₃H₃₈N₆O₂

Mol W.

: 670.8

Cat No.

: SA17744

Impurities, Olmesartan Medoxomil

Dehydro N2-Triphenylmethyl Olmesartan Ethyl Ester

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CAS No.

: 172875-70-6

Mol F.

: C₄₅H₄₂N₆O₂

Mol W.

: 698.85

Cat No.

: SA17745

Impurities, Nicardipine

Dehydro Nicardipine; USP Nicardipine Related Compound B

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CAS No.

: 59875-58-0(FreeBase);1216817-27-4(HCl)

Mol F.

: C26H27N3O6

Mol W.

: 477.51

Cat No.

: SA36202

Impurities, Olmesartan Medoxomil

Dehydro Olmesartan

$395.00 25 mg

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CAS No.

: 172875-98-8

Mol F.

: C24H24N6O2

Mol W.

: 428.49

Cat No.

: SA17735

Impurities, Olmesartan Medoxomil

Dehydro Olmesartan-2-trityl Medoxomil

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CAS No.

: 1391052-99-5

Mol F.

: C₄₈H₄₂N₆O₅

Mol W.

: 782.88

Cat No.

: SA17743

Clomipramine, Impurities

Dehydrocloroimipramine

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CAS No.

: 2095-42-3; 2724726-85-4

Mol F.

: C20H22ClN

Mol W.

: 311.85

Cat No.

: SA33701

Impurities, Sapropterin

Dehydrodeoxy Sepiapterin

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CAS No.

: 71014-28-3

Mol F.

: C9H9N5O2

Mol W.

: 219.2

Cat No.

: SA45223

Celecoxib, Impurities

Dehydroxy Bromocelecoxib

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CAS No.

: 170570-75-9

Mol F.

: C₁₇H₁₃BrF₃N₃O₂S

Mol W.

: 460.27

Cat No.

: SA11309

Impurities, Levonorgestrel

Delta1 (10)-4, 5-dihydro-levonorgestrel

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CAS No.

: NA

Mol F.

: C21H28O2

Mol W.

: 312.46

Cat No.

: SA23729

Impurities, Lorcaserin

Demethyl Lorcaserin

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CAS No.

: 25174-38-3

Mol F.

: C10H12ClN

Mol W.

: 181.66

Cat No.

: SA18802

Impurities, Ranitidine

Demethylamino Ranitidine Acetamide Sodium

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CAS No.

: 112251-56-6

Mol F.

: C12H18N3NaO4S

Mol W.

: 323.34

Cat No.

: SA26518

Impurities, Raltegravir

Deoxadiazole ethyl ester Raltegravir Impurity

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CAS No.

: 1193687-88-5

Mol F.

: C20H23FN4O6

Mol W.

: 434.42

Cat No.

: SA25609

Impurities, Raltegravir

Deoxadiazole methyl ester Raltegravir Impurity

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CAS No.

: 518048-04-9

Mol F.

: C19H21FN4O6

Mol W.

: 420.39

Cat No.

: SA25613

Impurities, Raltegravir

Deoxadiazole oxalamide Raltegravir Impurity

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CAS No.

: 1193687-86-3

Mol F.

: C18H20FN5O5

Mol W.

: 405.38

Cat No.

: SA25611

Donepezil, Impurities

Deoxy Donepezil Impurity

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CAS No.

: 844694-84-4(base)

Mol F.

: C24H31NO2

Mol W.

: 365.51

Cat No.

: SA34312

Impurities, Sapropterin

Deoxysepiapterin | CAS : 1797-87-1

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CAS No.

: 1797-87-1

Mol F.

: C9H11N5O2

Mol W.

: 221.20

Cat No.

: SA45222

Efavirenz, Impurities

Des cyclopropyl 4-(n-propylethynyl) Efavirenz

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CAS No.

Mol F.

: C14H11ClF3NO2

Mol W.

: 317.69

Cat No.

: SA17605

Clotrimazole, Impurities

Des Imidazole 1-pyrazole

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CAS No.

: 289905-88-0

Mol F.

: C22H17ClN2

Mol W.

: 344.84

Cat No.

: SA11616

Impurities, Topiramate

Des-[4,5-O-(1-methylethylidene)] Topiramate

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CAS No.

: 205249-06-5

Mol F.

: C9H17NO6S

Mol W.

: 267.3

Cat No.

: SA45511

Impurities, Lazertinib

Des-Acryloyl Lazertinib

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CAS No.

: 1903009-56-2

Mol F.

: C27H32N8O2

Mol W.

: 500.6

Cat No.

: SA53401

Fluticasone Propionate, Impurities

Des-Fluoromethyl S-Methyl Fluticasone Furoate

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CAS No.

: 397864-58-3

Mol F.

: C27H30F2O6S

Mol W.

: 520.59

Cat No.

: SA47005

Clomifene, Impurities

Des-N,N-diethylethanamine 4-Hydroxyclomiphene

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CAS No.

: 53775-07-8

Mol F.

: C20H15ClO

Mol W.

: 306.78

Cat No.

: SA21710

Amiodarone, Impurities

Des-O-[2-(diethylamino)ethyl]-1-methoxy Amiodarone

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CAS No.

: 1391054-75-3

Mol F.

: C20H18I2O4

Mol W.

: 576.16

Cat No.

: SA26412

Etravirine, Impurities

Des(6-amino-5-bromo)-5-amino-6-chloro Etravirine

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CAS No.

: 269055-78-9

Mol F.

: C20H15ClN6O

Mol W.

: 390.83

Cat No.

: SA26101

Impurities, Valsartan

Des(oxopentyl) Valsartan Benzyl Ester

$795.00 500 mg

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CAS No.

: 676129-93-4

Mol F.

: C26H27N5O2

Mol W.

: 441.52

Cat No.

: SA33317

Impurities, Palbociclib

Desacetyl Butoxyvinyl Polbociclib

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CAS No.

: 2270982-31-3

Mol F.

: C28H37N7O2

Mol W.

: 503.64

Cat No.

: SA40411

Impurities, Linezolid

Desacetyl-N,O-descarbonyl Linezolid

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CAS No.

: 333753-72-3

Mol F.

: C₁₃H₂₀FN₃O₂

Mol W.

: 269.32

Cat No.

: SA17508

Impurities, Osimertinib

Desacrylamide-Nitro-Osimertinib

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CAS No.

: 1421372-67-9

Mol F.

: C25H29N7O3

Mol W.

: 475.54

Cat No.

: SA44712

Dorzolamide, Impurities

Desaminosulfonyl Dorzolamide Hydrochloride

$495.00 25 mg

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CAS No.

: 897657-77-1

Mol F.

: C10H16ClNO2S2

Mol W.

: 281.82

Cat No.

: SA24114

Donepezil, Impurities

Desbenzyl Deoxy Donepezil Impurity

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CAS No.

: 1034439-43-4; 844694-83-3 (Salt)

Mol F.

: C17H26ClNO2

Mol W.

: 311.85

Cat No.

: SA34305

Donepezil, Impurities, Nitrosamine

Desbenzyl N-Nitroso Donepezil Impurity

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CAS No.

: NA

Mol F.

: C17H22N2O4

Mol W.

: 318.37

Cat No.

: SA34323

Dapagliflozin, Impurities

Desbromo Methoxy Dapagliflozin Sidechain Impurity

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CAS No.

Mol F.

: C16H17ClO2

Mol W.

: 276.76

Cat No.

: SA15059

Impurities, Linezolid

Descarbonyl Linezolid Impurity | CAS : 333753-67-6

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CAS No.

Mol F.

: C15H22FN3O3

Mol W.

: 311.35

Cat No.

: SA17531

Febuxostat, Impurities

Descarboxyl Febuxostat

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CAS No.

: 1335202-60-2

Mol F.

: C15H16N2OS

Mol W.

: 272.37

Cat No.

: SA32017

Efavirenz, Impurities

Deschloro-(S)-Efavirenz

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CAS No.

: 445468-46-2

Mol F.

: C₁₄H₁₀F₃NO₂

Mol W.

: 281.23

Cat No.

: SA17616

Roflumilast

Desdifluoromethyl Roflumilast Impurity

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CAS No.

: 475271-62-6

Mol F.

: C16H14Cl2N2O3

Mol W.

: 353.2

Cat No.

: SA38106

Hydroxyzine, Impurities

Desethoxyhydroxyzine

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CAS No.

: 109806-71-5;164726-80-1(HClsalt)

Mol F.

: C19H23ClN2O

Mol W.

: 330.85

Cat No.

: SA33806

Abemaciclib, Impurities

Desethyl Abemaciclib

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CAS No.

: 1231930-57-6

Mol F.

: C25H28F2N8

Mol W.

: 478.6

Cat No.

: SA53301

Dapagliflozin, Impurities

Desethyl Dapagliflozin 1-Methoxy 4,6-Benzylidene Impurity

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CAS No.

: NA

Mol F.

: C27H27ClO7

Mol W.

: 499.0

Cat No.

: SA15096

Dapagliflozin, Impurities

Desethyl Dapagliflozin 1,6-Gluconolatone Derivative

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CAS No.

: NA

Mol F.

: C25H29ClO12

Mol W.

: 556.9

Cat No.

: SA150104

Ertugliflozin, Impurities

DesEthyl Ertugliflozin Impuity

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CAS No.

: 1298086-17-5

Mol F.

: C20H21ClO7

Mol W.

: 408.83

Cat No.

: SA36803

Impurities, Sacubitril

Desethyl Sacubitril Ethyl Succinate Impurity | CAS : 149709-49-9

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CAS No.

: 149709-49-9

Mol F.

: C24H29NO5

Mol W.

: 411.49

Cat No.

: SA40917

Impurities, Sacubitril

Desethyl Sacubitril Isopropyl Succinate Impurity | CAS : 2459446-51-4

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CAS No.

: 2459446-51-4

Mol F.

: C25H31NO5

Mol W.

: 425.52

Cat No.

: SA40915

Desonide, Impurities

Desglycolaldehyde Desonide

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CAS No.

: 117782-95-3

Mol F.

: C₂₂H₃₀O₄

Mol W.

: 358.47

Cat No.

: SA19007

Impurities, Salbutamol

Deshydroxy Albuterol

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CAS No.

: 1823256-56-9

Mol F.

: C13H21NO2

Mol W.

: 233.31

Cat No.

: SA26015

Formoterol, Impurities

Deshydroxy Desformyl Formoterol

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CAS No.

Mol F.

: C18H24N2O2

Mol W.

: 300.4

Cat No.

: SA21113

Fingolimod, Impurities

Deshydroxymethyl Fingolimod Impurity

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CAS No.

: 168560-42-7;177260-59-2

Mol F.

: C18H32ClNO

Mol W.

: 313.91000000000003

Cat No.

: SA34510