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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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Efavirenz, Impurities

Deschloro-(S)-Efavirenz

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CAS No.

: 445468-46-2

Mol F.

: C₁₄H₁₀F₃NO₂

Mol W.

: 281.23

Cat No.

: SA17616

Impurities, 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

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

Fingolimod, Impurities

Deshydroxymethyl N-Acetyl Fingolimod Impurity

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CAS No.

: 177259-52-8

Mol F.

: C20H33NO2

Mol W.

: 319.48

Cat No.

: SA34511

Clomipramine, Impurities

Desipramine

$85.00 25 mg

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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CAS No.

: 117811-18-4

Mol F.

: C20H19ClN2

Mol W.

: 322.8

Cat No.

: SA48810

Desloratadine, Impurities

Desloratadine Dihydro Impurity

$555.00 25 mg

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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

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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

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CAS No.

: 1193725-73-3

Mol F.

: C19H19ClN2O

Mol W.

: 326.8

Cat No.

: SA48813

Desloratadine, Impurities

Desloratadine N-oxide

$355.00 25 mg

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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

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CAS No.

: 117796-50-6

Mol F.

: C19H19BrN2

Mol W.

: 355.3

Cat No.

: SA48803

Cinacalcet, Impurities

Desmethoxy B5 Hydrochloride

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CAS No.

: 70580-28-8

Mol F.

: C8H11NO : HCl

Mol W.

: 137.18: 36.46

Cat No.

: SA34215

Cyclobenzaprine, Impurities

Desmethyl Boc-Cyclobenzaprine

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CAS No.

: 1346604-04-3

Mol F.

: C₂₄H₂₇NO₂

Mol W.

: 361.48

Cat No.

: SA23108

Bosentan, Impurities

Desmethyl Bosentan

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CAS No.

: 253688-61-8

Mol F.

: C26H27N5O6S

Mol W.

: 537.59

Cat No.

: SA28603

Cariprazine, Impurities

Desmethyl Cariprazine

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CAS No.

: 839712-15-1

Mol F.

: C20H30Cl2N4O

Mol W.

: 413.38

Cat No.

: SA39703

Celecoxib, Impurities

Desmethyl Celecoxib

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CAS No.

: 170569-87-6

Mol F.

: C₁₆H₁₂F₃N₃O₂S

Mol W.

: 367.35

Cat No.

: SA11310

Impurities, Ranitidine

Desmethyl Ranitidine

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CAS No.

: 66357-25-3

Mol F.

: C12H20N4O3S

Mol W.

: 300.38

Cat No.

: SA26514

Desogestrel, Impurities

Desogestrel

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CAS No.

: 54024-22-5

Mol F.

: C₂₂H₃₀O

Mol W.

: 310.47

Cat No.

: SA16500

Desogestrel, Impurities

Desogestrel EP Impurity A

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CAS No.

: 201360-82-9

Mol F.

: C₂₂H₃₀O

Mol W.

: 310.47

Cat No.

: SA16501

Desogestrel, Impurities

Desogestrel EP Impurity B

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CAS No.

: 54024-12-3

Mol F.

: C21H28O

Mol W.

: 296.45

Cat No.

: SA16502

Desogestrel, Impurities

Desogestrel EP Impurity C

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CAS No.

: 54024-21-4

Mol F.

: C₂₀H₂₈O

Mol W.

: 284.44

Cat No.

: SA16503

Desogestrel, Impurities

Desogestrel EP Impurity D

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CAS No.

: 54048-10-1

Mol F.

: C₂₂H₂₈O₂

Mol W.

: 324.46

Cat No.

: SA16504

Desogestrel, Impurities

Desogestrel EP Impurity E

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CAS No.

: 70805-85-5

Mol F.

: C₂₂H₃₀O₂

Mol W.

: 326.47

Cat No.

: SA16505

Desonide, Impurities

Desonide 16-Ene Impurity

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CAS No.

: 3103-17-1

Mol F.

: C21H26O4

Mol W.

: 342.43

Cat No.

: SA19010

Budesonide, Impurities

Desonide 21-Acetate

$125.00 25 mg

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CAS No.

: 25092-25-5

Mol F.

: C26H34O7

Mol W.

: 458.54

Cat No.

: SA14119

Desonide, Impurities

Desonide Isobutyrate

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CAS No.

: 78806-61-8

Mol F.

: C₂₈H₃₈O₇

Mol W.

: 486.6

Cat No.

: SA19003

Desonide, Impurities

Desonide-21-aldehyde Hydrate

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CAS No.

: NA

Mol F.

: C₂₄H₃₂O₇

Mol W.

: 432.51

Cat No.

: SA19004

Impurities, Palbociclib

Desoxo Palbociclib

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CAS No.

: 2204863-06-7

Mol F.

: C24H29N7O

Mol W.

: 431.53

Cat No.

: SA40412

Tenofovir alafenamide

Desphenyl Tenofovir Alafenamide

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CAS No.

: 376633-26-0

Mol F.

: C15H25N6O5P

Mol W.

: 400.38

Cat No.

: SA42407

Impurities, Rilpivirine

Despropenenitrile Bromo Rilpivirine

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CAS No.

: 374067-85-3

Mol F.

: C19H16BrN5

Mol W.

: 394.27

Cat No.

: SA25401

Impurities, Sacubitril

Dessuccinyl Desethyl N-Boc Sacubitril Impurity | CAS : 1012341-50-2

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CAS No.

: 1012341-50-2

Mol F.

: C23H29NO4

Mol W.

: 383.48

Cat No.

: SA40911

Impurities, Sacubitril

Dessuccinyl N-Boc Sacubitril Impurity | CAS : 149709-60-4

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CAS No.

: 149709-60-4

Mol F.

: C25H33NO4

Mol W.

: 411.53

Cat No.

: SA40913

Impurities, Sacubitril

Dessuccinyl Sacubitril Acid Impurity | CAS : 1038924-71-8

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CAS No.

: 1038924-71-8

Mol F.

: C18H22ClNO2

Mol W.

: 319.83

Cat No.

: SA40914

Impurities, Nitrosamine, Valsartan

Desvaleryl Valsartan N-Nitroso Impurity

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CAS No.

: 2254485-68-0

Mol F.

: C19H20N6O3

Mol W.

: 380.4

Cat No.

: SA33323