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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, Lorcaserin

Dechloro 2-Methyl analog

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CAS No.

: 743374-52-9

Mol F.

: C11H15N

Mol W.

: 161.24

Cat No.

: SA18812

Clonixin, Impurities

Dechloro Chlonixin

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CAS No.

: 17782-05-7

Mol F.

: C13H12N2O2

Mol W.

: 228.25

Cat No.

: SA38001

Decitabine, Impurities

Decitabine

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CAS No.

: 2353-33-5

Mol F.

: C8H12N4O4

Mol W.

: 228.21

Cat No.

: SA42200

Decitabine, Impurities

Decitabine 3-Toluoyl Impurity

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CAS No.

: 183016-21-9

Mol F.

: C16H18N4O5

Mol W.

: 346.34

Cat No.

: SA42208

Decitabine, Impurities

Decitabine 3-Toluoyl Impurity

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CAS No.

: 183016-21-9

Mol F.

: C16H18N4O5

Mol W.

: 346.34

Cat No.

: SA42202

Decitabine, Impurities

Decitabine 6-Methyl Impurity

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CAS No.

: 16352-06-0

Mol F.

: C4H6N4O

Mol W.

: 126.12

Cat No.

: SA42207

Decitabine, Impurities

Decitabine alpha-Isomer

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CAS No.

: 22432-95-7

Mol F.

: C8H12N4O4

Mol W.

: 228.21

Cat No.

: SA42210

Decitabine, Impurities

Decitabine Amide Impurity

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CAS No.

: 2514661-75-5

Mol F.

: C4H6N6O2

Mol W.

: 170.13

Cat No.

: SA42209

Decitabine, Impurities

Decitabine Imine Impurity

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CAS No.

: 2512207-76-8

Mol F.

: C4H6N6O2

Mol W.

: 170.13

Cat No.

: SA42201

Decitabine, Impurities

Decitabine Impurity D

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CAS No.

: 1126-46-1

Mol F.

: C8H7ClO2

Mol W.

: 170.59

Cat No.

: SA42205

Decitabine, Impurities

Decitabine Triazinone Impurity

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CAS No.

: 931-86-2

Mol F.

: C3H4N4O

Mol W.

: 112.09

Cat No.

: SA42211

Decitabine, Impurities

Decitabine Urea Impurity

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CAS No.

: 570410-72-9

Mol F.

: C7H14N4O4

Mol W.

: 218.21

Cat No.

: SA42212

Decitabine, Impurities

Decitabine USP Related Compound F

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CAS No.

: 69304-65-0

Mol F.

: C7H14N4O4

Mol W.

: 218.2

Cat No.

: SA42216

Impurities, Venlafaxine

Decyclohexanol-ethoxycarbonyl-O-desmethyl Venlafaxine

$1,555.00 500 mg

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CAS No.

: 1346600-77-8

Mol F.

: C13H19NO3

Mol W.

: 237.29

Cat No.

: SA22723

Deferasirox, Impurities

DEF-I Dimer Impurity

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CAS No.

: 688656-86-1

Mol F.

: C28H16N2O6S

Mol W.

: 508.5

Cat No.

: SA25116

Deferasirox, Impurities

Deferasirox

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CAS No.

: 201530-41-8

Mol F.

: C21H15N3O4

Mol W.

: 373.36

Cat No.

: SA25100

Deferasirox, Impurities

Deferasirox Methyl Ester

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CAS No.

: 1266741-05-2

Mol F.

: C22H17N3O4

Mol W.

: 387.39

Cat No.

: SA25103

Deferasirox, Impurities

Deferasirox Salicyloyl Ester

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CAS No.

: 1395346-28-7

Mol F.

: C28H19N3O6

Mol W.

: 493.46

Cat No.

: SA25108

Deferasirox, Impurities

Deferasirox sulfide dimer

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CAS No.

: 1688656-83-8

Mol F.

: C42H28N6O8S

Mol W.

: 776.77

Cat No.

: SA25109

Deferasirox, Impurities

Deferasirox sulfoxide dimer

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CAS No.

: 1688656-84-9

Mol F.

: C42H28N6O9S

Mol W.

: 792.77

Cat No.

: SA25110

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

Olmesartan Medoxomil

Dehydro Olmesartan-2-trityl Medoxomil

$1,195.00 200 mg

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CAS No.

: 1391052-99-5

Mol F.

: C₄₈H₄₂N₆O₅

Mol W.

: 782.88

Cat No.

: SA17743

Olmesartan Medoxomil

Dehydro Olmesartan; Olmesartan Olefinic Acid

$255.00 25 mg

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CAS No.

: 172875-98-8

Mol F.

: C24H24N6O2

Mol W.

: 428.49

Cat No.

: SA17735

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

Benzydamine, Impurities

Demethyl Benzydamine

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CAS No.

: 32852-16-7

Mol F.

: C18H21N3O : HCl

Mol W.

: 295.4

Cat No.

: SA54610

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

Famciclovir, Impurities

Deoxy Chloro Famciclovir

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CAS No.

: NA

Mol F.

: C12H16ClN5O2

Mol W.

: 297.8

Cat No.

: SA48304

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