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Impurities

SynThink is a producer and supplier of a number of pharmaceutical Reference Standards (Impurity Standards) which are required for pharmaceutical companies to study quality, stability and biological safety of pharmaceutical products. Many API Impurities are available in our stock.

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Etravirine, Impurities

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

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Out of Stock

CAS No.

: 269055-78-9

Mol F.

: C20H15ClN6O

Mol W.

: 390.83

Cat No.

: SA26101

Impurities, Valsartan

Des(oxopentyl) Valsartan Benzyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 676129-93-4

Mol F.

: C26H27N5O2

Mol W.

: 441.52

Cat No.

: SA33317

Impurities, Palbociclib

Desacetyl Butoxyvinyl Polbociclib Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 2270982-31-3

Mol F.

: C‚ˆHƒ‡N‡O‚

Mol W.

: 503.64

Cat No.

: SA40411

Impurities, Linezolid

Desacetyl-N,O-descarbonyl Linezolid

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Out of Stock

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

Out of Stock

CAS No.

: 1421372-67-9

Mol F.

: C25H29N7O3

Mol W.

: 475.54

Cat No.

: SA44712

Dorzolamide, Impurities

Desaminosulfonyl Dorzolamide Hydrochloride

$495.00 25 mg

Out of Stock

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

Out of Stock

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

Out of Stock

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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Out of Stock

CAS No.

Mol F.

: C15H22FN3O3

Mol W.

: 311.35

Cat No.

: SA17531

Febuxostat, Impurities

Descarboxyl Febuxostat

Please enquire for price & pack size

Out of Stock

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

Out of Stock

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

Out of Stock

CAS No.

: 475271-62-6

Mol F.

: C16H14Cl2N2O3

Mol W.

: 353.2

Cat No.

: SA38106

Hydroxyzine, Impurities

Desethoxyhydroxyzine

Please enquire for price & pack size

Out of Stock

CAS No.

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

Mol F.

: C19H23ClN2O

Mol W.

: 330.85

Cat No.

: SA33806

Ertugliflozin, Impurities

Desethyl Ertugliflozin Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1298086-17-5

Mol F.

: C20H21ClO7

Mol W.

: 408.83

Cat No.

: SA36803

Desonide, Impurities

Desglycolaldehyde Desonide

Please enquire for price & pack size

Out of Stock

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

Out of Stock

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

Out of Stock

CAS No.

Mol F.

: C18H24N2O2

Mol W.

: 300.4

Cat No.

: SA21113

Fingolimod, Impurities

Deshydroxymethyl Fingolimod Impurity

Please enquire for price & pack size

Out of Stock

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

Out of Stock

CAS No.

: 177259-52-8

Mol F.

: C20H33NO2

Mol W.

: 319.48

Cat No.

: SA34511

Clomipramine, Impurities

Desipramine

$85.00 25 mg

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

CAS No.

: 117811-18-4

Mol F.

: C20H19ClN2

Mol W.

: 322.8

Cat No.

: SA48810

Desloratadine, Impurities

Desloratadine Dihydro Impurity

$555.00 25 mg

Out of Stock

CAS No.

: 119770-61-5

Mol F.

: C20H21ClN2

Mol W.

: 324.9

Cat No.

: SA48811

Desloratadine, Impurities

Desloratadine EP Impurity B

$355.00 25 mg

Out of Stock

CAS No.

: 183198-49-4

Mol F.

: C19H19ClN2

Mol W.

: 310.82

Cat No.

: SA48802

Desloratadine, Impurities

Desloratadine N-Hydroxy Impurity

$395.00 50 mg

Out of Stock

CAS No.

: 1193725-73-3

Mol F.

: C19H19ClN2O

Mol W.

: 326.8

Cat No.

: SA48813

Desloratadine, Impurities

Desloratadine N-oxide

$355.00 25 mg

Out of Stock

CAS No.

: 169253-26-3

Mol F.

: C19H19ClN2O

Mol W.

: 326.8

Cat No.

: SA48817

Desloratadine, Impurities

Desloratadine USP Related Compound A

$395.00 25 mg

Out of Stock

CAS No.

: 117796-50-6

Mol F.

: C19H19BrN2

Mol W.

: 355.3

Cat No.

: SA48803

Cinacalcet, Impurities

Desmethoxy B5 Hydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 70580-28-8

Mol F.

: CˆHNOHCl"

Mol W.

: 137.1836.46"

Cat No.

: SA34215

Cyclobenzaprine, Impurities

Desmethyl Boc-Cyclobenzaprine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1346604-04-3

Mol F.

: C₂₄H₂₇NO₂

Mol W.

: 361.48

Cat No.

: SA23108

Bosentan, Impurities

Desmethyl Bosentan

Please enquire for price & pack size

Out of Stock

CAS No.

: 253688-61-8

Mol F.

: C26H27N5O6S

Mol W.

: 537.59

Cat No.

: SA28603

Cariprazine, Impurities

Desmethyl Cariprazine

Please enquire for price & pack size

Out of Stock

CAS No.

: 839712-15-1

Mol F.

: C‚€Hƒ€Cl‚N„O

Mol W.

: 413.38

Cat No.

: SA39703

Celecoxib, Impurities

Desmethyl Celecoxib

Please enquire for price & pack size

Out of Stock

CAS No.

: 170569-87-6

Mol F.

: C₁₆H₁₂F₃N₃O₂S

Mol W.

: 367.35

Cat No.

: SA11310

Impurities, Ranitidine

Desmethyl Ranitidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 66357-25-3

Mol F.

: C12H20N4O3S

Mol W.

: 300.38

Cat No.

: SA26514

Desogestrel, Impurities

Desogestrel

Please enquire for price & pack size

Out of Stock

CAS No.

: 54024-22-5

Mol F.

: C₂₂H₃₀O

Mol W.

: 310.47

Cat No.

: SA16500

Desogestrel, Impurities

Desogestrel EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 201360-82-9

Mol F.

: C₂₂H₃₀O

Mol W.

: 310.47

Cat No.

: SA16501

Desogestrel, Impurities

Desogestrel EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 54024-12-3

Mol F.

: C21H28O

Mol W.

: 296.45

Cat No.

: SA16502

Desogestrel, Impurities

Desogestrel EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 54024-21-4

Mol F.

: C₂₀H₂₈O

Mol W.

: 284.44

Cat No.

: SA16503

Desogestrel, Impurities

Desogestrel EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 54048-10-1

Mol F.

: C₂₂H₂₈O₂

Mol W.

: 324.46

Cat No.

: SA16504

Desogestrel, Impurities

Desogestrel EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 70805-85-5

Mol F.

: C₂₂H₃₀O₂

Mol W.

: 326.47

Cat No.

: SA16505

Desonide, Impurities

Desonide 16-Ene Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 3103-17-1

Mol F.

: C21H26O4

Mol W.

: 342.43

Cat No.

: SA19010

Budesonide, Impurities

Desonide 21-Acetate

$125.00 25 mg

Out of Stock

CAS No.

: 25092-25-5

Mol F.

: C26H34O7

Mol W.

: 458.54

Cat No.

: SA14119

Desonide, Impurities

Desonide Isobutyrate

Please enquire for price & pack size

Out of Stock

CAS No.

: 78806-61-8

Mol F.

: C₂₈H₃₈O₇

Mol W.

: 486.6

Cat No.

: SA19003