Home / Products / Impurities

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.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Impurities, Nicardipine

Dehydro Nicardipine; USP Nicardipine Related Compound B

Please enquire for price & pack size

PLEASE ENQUIRE

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

PLEASE ENQUIRE

CAS No.

: 172875-98-8

Mol F.

: C24H24N6O2

Mol W.

: 428.49

Cat No.

: SA17735

Impurities, Olmesartan Medoxomil

Dehydro Olmesartan-2-trityl Medoxomil

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1391052-99-5

Mol F.

: C₄₈H₄₂N₆O₅

Mol W.

: 782.88

Cat No.

: SA17743

Clomipramine, Impurities

Dehydrocloroimipramine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

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

Mol F.

: C20H22ClN

Mol W.

: 311.85

Cat No.

: SA33701

Celecoxib, Impurities

Dehydroxy Bromocelecoxib

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 170570-75-9

Mol F.

: C₁₇H₁₃BrF₃N₃O₂S

Mol W.

: 460.27

Cat No.

: SA11309

Impurities, Levonorgestrel

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

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C21H28O2

Mol W.

: 312.46

Cat No.

: SA23729

Impurities, Lorcaserin

Demethyl Lorcaserin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 25174-38-3

Mol F.

: C10H12ClN

Mol W.

: 181.66

Cat No.

: SA18802

Impurities, Ranitidine

Demethylamino Ranitidine Acetamide Sodium

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 112251-56-6

Mol F.

: C12H18N3NaO4S

Mol W.

: 323.34

Cat No.

: SA26518

Impurities, Raltegravir

Deoxadiazole ethyl ester Raltegravir Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1193687-88-5

Mol F.

: C20H23FN4O6

Mol W.

: 434.42

Cat No.

: SA25609

Impurities, Raltegravir

Deoxadiazole methyl ester Raltegravir Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 518048-04-9

Mol F.

: C19H21FN4O6

Mol W.

: 420.39

Cat No.

: SA25613

Impurities, Raltegravir

Deoxadiazole oxalamide Raltegravir Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1193687-86-3

Mol F.

: C18H20FN5O5

Mol W.

: 405.38

Cat No.

: SA25611

Donepezil, Impurities

Deoxy Donepezil Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 844694-84-4(base)

Mol F.

: C24H31NO2

Mol W.

: 365.51

Cat No.

: SA34312

Efavirenz, Impurities

Des cyclopropyl 4-(n-propylethynyl) Efavirenz

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C14H11ClF3NO2

Mol W.

: 317.69

Cat No.

: SA17605

Clotrimazole, Impurities

Des Imidazole 1-pyrazole

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 289905-88-0

Mol F.

: C22H17ClN2

Mol W.

: 344.84

Cat No.

: SA11616

Impurities, Topiramate

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

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 205249-06-5

Mol F.

: C9H17NO6S

Mol W.

: 267.3

Cat No.

: SA45511

Fluticasone Propionate, Impurities

Des-Fluoromethyl S-Methyl Fluticasone Furoate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 397864-58-3

Mol F.

: C27H30F2O6S

Mol W.

: 520.59

Cat No.

: SA47005

Clomifene, Impurities

Des-N,N-diethylethanamine 4-Hydroxyclomiphene

Please enquire for price & pack size

PLEASE ENQUIRE

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

Please enquire for price & pack size

PLEASE ENQUIRE

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

Please enquire for price & pack size

PLEASE ENQUIRE

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

PLEASE ENQUIRE

CAS No.

: 676129-93-4

Mol F.

: C26H27N5O2

Mol W.

: 441.52

Cat No.

: SA33317

Impurities, Palbociclib

Desacetyl Butoxyvinyl Polbociclib

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2270982-31-3

Mol F.

: C28H37N7O2

Mol W.

: 503.64

Cat No.

: SA40411

Impurities, Linezolid

Desacetyl-N,O-descarbonyl Linezolid

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 333753-72-3

Mol F.

: C₁₃H₂₀FN₃O₂

Mol W.

: 269.32

Cat No.

: SA17508

Impurities, Osimertinib

Desacrylamide-Nitro-Osimertinib

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1421372-67-9

Mol F.

: C25H29N7O3

Mol W.

: 475.54

Cat No.

: SA44712

Dorzolamide, Impurities

Desaminosulfonyl Dorzolamide Hydrochloride

$495.00 25 mg

PLEASE ENQUIRE

CAS No.

: 897657-77-1

Mol F.

: C10H16ClNO2S2

Mol W.

: 281.82

Cat No.

: SA24114

Donepezil, Impurities

Desbenzyl Deoxy Donepezil Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

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

Mol F.

: C17H26ClNO2

Mol W.

: 311.85

Cat No.

: SA34305

Dapagliflozin, Impurities

Desbromo Methoxy Dapagliflozin Sidechain Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C16H17ClO2

Mol W.

: 276.76

Cat No.

: SA15059

Impurities, Linezolid

Descarbonyl Linezolid Impurity | CAS : 333753-67-6

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C15H22FN3O3

Mol W.

: 311.35

Cat No.

: SA17531

Febuxostat, Impurities

Descarboxyl Febuxostat

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1335202-60-2

Mol F.

: C15H16N2OS

Mol W.

: 272.37

Cat No.

: SA32017

Efavirenz, Impurities

Deschloro-(S)-Efavirenz

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 445468-46-2

Mol F.

: C₁₄H₁₀F₃NO₂

Mol W.

: 281.23

Cat No.

: SA17616

Impurities, Roflumilast

Desdifluoromethyl Roflumilast Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 475271-62-6

Mol F.

: C16H14Cl2N2O3

Mol W.

: 353.2

Cat No.

: SA38106

Hydroxyzine, Impurities

Desethoxyhydroxyzine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

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

Mol F.

: C19H23ClN2O

Mol W.

: 330.85

Cat No.

: SA33806

Ertugliflozin, Impurities

DesEthyl Ertugliflozin Impuity

Please enquire for price & pack size

PLEASE ENQUIRE

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

Please enquire for price & pack size

PLEASE ENQUIRE

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

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2459446-51-4

Mol F.

: C25H31NO5

Mol W.

: 425.52

Cat No.

: SA40915

Desonide, Impurities

Desglycolaldehyde Desonide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 117782-95-3

Mol F.

: C₂₂H₃₀O₄

Mol W.

: 358.47

Cat No.

: SA19007

Impurities, Salbutamol

Deshydroxy Albuterol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1823256-56-9

Mol F.

: C13H21NO2

Mol W.

: 233.31

Cat No.

: SA26015

Formoterol, Impurities

Deshydroxy Desformyl Formoterol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C18H24N2O2

Mol W.

: 300.4

Cat No.

: SA21113

Fingolimod, Impurities

Deshydroxymethyl Fingolimod Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

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

Mol F.

: C18H32ClNO

Mol W.

: 313.91000000000003

Cat No.

: SA34510

Fingolimod, Impurities

Deshydroxymethyl N-Acetyl Fingolimod Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 177259-52-8

Mol F.

: C20H33NO2

Mol W.

: 319.48

Cat No.

: SA34511

Clomipramine, Impurities

Desipramine

$85.00 25 mg

PLEASE ENQUIRE

CAS No.

: 58-28-6; 50-47-5

Mol F.

: C18H23ClN2

Mol W.

: 302.84

Cat No.

: SA33708

Desloratadine, Impurities

Desloratadine 11-Hydroxy Impurity

$125.00 25 mg

PLEASE ENQUIRE

CAS No.

: 153200-97-6

Mol F.

: C19H21ClN2O

Mol W.

: 328.8

Cat No.

: SA48806

Desloratadine, Impurities

Desloratadine 4,8-Dichloro Impurity

$295.00 25 mg

PLEASE ENQUIRE

CAS No.

: 133330-63-9

Mol F.

: C19H18Cl2N2

Mol W.

: 345.3

Cat No.

: SA48814

Desloratadine, Impurities

Desloratadine 8-Bromo-11-Hydroxy-N-Methyl Impurity

$695.00 25 mg

PLEASE ENQUIRE

CAS No.

: 2648910-20-5

Mol F.

: C20H23BrN2O

Mol W.

: 387.3

Cat No.

: SA48807

Desloratadine, Impurities

Desloratadine 8-Bromo-11-Oxo Impurity

$495.00 25 mg

PLEASE ENQUIRE

CAS No.

: 143540-56-1

Mol F.

: C14H10BrNO

Mol W.

: 288.1

Cat No.

: SA48808

Desloratadine, Impurities

Desloratadine 8-Bromo-N-Methyl Impurity

$395.00 25 mg

PLEASE ENQUIRE

CAS No.

: 130642-57-8

Mol F.

: C20H21BrN2

Mol W.

: 369.3

Cat No.

: SA48809

Desloratadine, Impurities

Desloratadine 8-Dechloro-7-Chloro Impurity

$595.00 25 mg

PLEASE ENQUIRE

CAS No.

: 1346601-53-3

Mol F.

: C19H19ClN2

Mol W.

: 310.8

Cat No.

: SA48815

Desloratadine, Impurities

Desloratadine 8-Dechloro-9-Chloro Impurity

$595.00 25 mg

PLEASE ENQUIRE

CAS No.

: 117811-13-9

Mol F.

: C19H19ClN2

Mol W.

: 310.8

Cat No.

: SA48816

Desloratadine, Impurities

Desloratadine Dehydro 11-Hydroxy N-Methyl Impurity

$395.00 25 mg

PLEASE ENQUIRE

CAS No.

: 117811-17-3

Mol F.

: C20H21ClN2O

Mol W.

: 340.9

Cat No.

: SA48812

Desloratadine, Impurities

Desloratadine Dehydro 11-Oxo Impurity

$295.00 25 mg

PLEASE ENQUIRE

CAS No.

: 117811-16-2

Mol F.

: C14H8ClNO

Mol W.

: 241.7

Cat No.

: SA48804

Desloratadine, Impurities

Desloratadine Dehydro N-Methyl Impurity

$355.00 25 mg

PLEASE ENQUIRE

CAS No.

: 117811-18-4

Mol F.

: C20H19ClN2

Mol W.

: 322.8

Cat No.

: SA48810