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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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Moxifloxacin

Descarboxy Moxifloxacin

$99.00 25 mg

In Stock

CAS No.

: 1322062-57-6

Mol F.

: C20H24FN3O2

Mol W.

: 357.42

Cat No.

: SA30719

Bupropion, Impurities

Deschloro Bupropion Hydrochloride

$125.00 25 mg

In Stock

CAS No.

: 63199-74-6

Mol F.

: C13H20ClNO

Mol W.

: 241.76

Cat No.

: SA12218

Empagliflozin, Impurities

Deschloro Empagliflozin

$180.00 10 mg

In Stock

CAS No.

: 2452301-27-6

Mol F.

: C23H28O7

Mol W.

: 416.46

Cat No.

: SA15110

Ertugliflozin, Impurities

Deschloro Ertugliflozin Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C22H26O7

Mol W.

: 402.44

Cat No.

: SA36808

Dolutegravir, Impurities

Desdifluoro Dolutegravir

Please enquire for price & pack size

In Stock

CAS No.

: 2244161-71-3

Mol F.

: C20H21N3O5

Mol W.

: 383.4

Cat No.

: SA20211

Azilsartan

Desethyl Azilsartan Medoxomil

Please enquire for price & pack size

In Stock

CAS No.

: 1417576-00-1

Mol F.

: C28H20N4O8

Mol W.

: 540.48

Cat No.

: SA42808

Clomifene, Impurities

Desethylclomifene

Please enquire for price & pack size

In Stock

CAS No.

: 1310815-19-0

Mol F.

: C24H24ClNO

Mol W.

: 377.9

Cat No.

: SA21708

Citalopram, Impurities

Desfluoro Citalopram Oxalate

Please enquire for price & pack size

In Stock

CAS No.

: 1093072-86-6

Mol F.

: C22H24N2O5

Mol W.

: 396.44

Cat No.

: SA17001

Ezetimibe

Desfluoro Ezetimibe; Ezetimibe Desfluoroaniline Analog

$299.00 25 mg

In Stock

CAS No.

: 302781-98-2

Mol F.

: C24H22FNO3

Mol W.

: 391.43

Cat No.

: SA14805

Fosaprepitant

Desfluoro Fosaprepitant Dimeglumine

$750.00 25 mg

In Stock

CAS No.

Mol F.

: C37H56F6N6O16P

Mol W.

: 985.83

Cat No.

: SA45421

Abacavir, Impurities

Desformyl Abaca-1; Abacavir Related Compound B

$195.00 25 mg

In Stock

CAS No.

: 141271-11-6

Mol F.

: C10H14ClN5O

Mol W.

: 255.09

Cat No.

: SA18100

Empagliflozin, Impurities

Desglucosylempagliflozin 4,4’-Dimer; Empagliflozin Dimer

$265.00 10 mg

In Stock

CAS No.

Mol F.

: C34H32Cl2O4

Mol W.

: 575.52

Cat No.

: SA15109

Desonide, Impurities

Desglycolaldehyde-carboxyl Desonide

Please enquire for price & pack size

In Stock

CAS No.

: 117782-94-2

Mol F.

: C₂₃H₃₀O₆

Mol W.

: 402.48

Cat No.

: SA19008

Formoterol, Impurities

Deshydroxy Impurity (Formoterol Fumarate)

$600.00 25 mg

In Stock

CAS No.

: 477552-93-5

Mol F.

: C19H24N2O3

Mol W.

: 328.41

Cat No.

: SA21110

Fluphenazine, Impurities

Deshydroxyethyl Fluphenazine

Please enquire for price & pack size

In Stock

CAS No.

: 2804-16-2 (Free); 4617-82-7 (HCl)

Mol F.

: C20H22F3N3S

Mol W.

: 393.47

Cat No.

: SA39307

Desloratadine, Impurities

Desloratadine Dehydro Impurity

$355.00 25 mg

In Stock

CAS No.

: 117811-20-8

Mol F.

: C19H17ClN2

Mol W.

: 308.8

Cat No.

: SA48805

Desloratadine, Impurities

Desloratadine EP Impurity A

$355.00 25 mg

In Stock

CAS No.

: 298220-99-2

Mol F.

: C19H20ClFN2

Mol W.

: 330.8

Cat No.

: SA48801

Impurities, Loratadine, Nitrosamine

Desloratadine Nitroso Impurity; N-Nitroso-Desloratadine

$155.00 25 mg

In Stock

CAS No.

: 1246819-22-6

Mol F.

: C19H18ClN3O

Mol W.

: 339.82

Cat No.

: SA34034

Gatifloxacin, Impurities

Desmethyl Gatifloxacin

Please enquire for price & pack size

In Stock

CAS No.

: 112811-57-1

Mol F.

: C18H20FN3O4

Mol W.

: 361.37

Cat No.

: SA37904

Impurities, Rilpivirine

Desmethyl Impurity 4-Iodo-2,6-dimethyl

Please enquire for price & pack size

In Stock

CAS No.

: 13194-68-8

Mol F.

: C7H8IN

Mol W.

: 233.05

Cat No.

: SA25419

Impurities, Nintedanib

Desmethyl Nintedanib

Please enquire for price & pack size

In Stock

CAS No.

: 894783-61-0

Mol F.

: C30H31N5O4

Mol W.

: 525.6

Cat No.

: SA22525

Impurities, Tenofovir

Desmethyl Tenofovir Disoproxil; Tenofovir disoproxil fumarate Impurity P

$99.00 10 mg

In Stock

CAS No.

: 365417-53-4; 1798422-29-3

Mol F.

: C18H28N5O10P

Mol W.

: 505.42

Cat No.

: SA36919

Impurities, Venlafaxine

Desmethyl Venlafaxine N-Oxide

$255.00 25 mg

In Stock

CAS No.

: 1021933-95-8

Mol F.

: C16H25NO3

Mol W.

: 279.37

Cat No.

: SA22736

Desonide, Impurities

Desonide

Please enquire for price & pack size

In Stock

CAS No.

: 638-94-8

Mol F.

: C₂₄H₃₂O₆

Mol W.

: 416.51

Cat No.

: SA19001

Desonide, Impurities

Desonide 21-Acetate

Please enquire for price & pack size

In Stock

CAS No.

: 25092-25-5

Mol F.

: C₂₆H₃₄O₇

Mol W.

: 458.54

Cat No.

: SA19002

Desoximetasone, Impurities

Desoximetasone Oxidative Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 75262-69-0

Mol F.

: C21H27FO4

Mol W.

: 362.44

Cat No.

: SA19204

Desoximetasone, Impurities

Desoximrthasone-delta-9,11-analog

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C22H28O3

Mol W.

: 340.46

Cat No.

: SA19202

Palbociclib

Desoxo Palbociclib Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 2204863-06-7

Mol F.

: C24H29N7O

Mol W.

: 431.53

Cat No.

: SA40412

Dexamethasone

Desoxymetasone

Please enquire for price & pack size

In Stock

CAS No.

: 382-67-2

Mol F.

: C22H29FO4

Mol W.

: 376.46

Cat No.

: SA15508

Dexamethasone, Impurities

Dexamethasone 17-Propionate Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 15423-89-9

Mol F.

: C25H33FO6

Mol W.

: 448.52

Cat No.

: SA15522

Dexamethasone

Dexamethasone Acid

Please enquire for price & pack size

In Stock

CAS No.

: 37927-01-8

Mol F.

: C₂₁H₂₇FO₅

Mol W.

: 378.43

Cat No.

: SA15506

Dexamethasone

Dexamethasone EP Impurity B

$95.00 25 mg

In Stock

CAS No.

: 378-44-9

Mol F.

: C22H29FO5

Mol W.

: 392.46

Cat No.

: SA15519

Dexamethasone

Dexamethasone EP Impurity C

$155.00 25 mg

In Stock

CAS No.

: 426-17-5

Mol F.

: C22H31FO5

Mol W.

: 394.48

Cat No.

: SA15515

Dexamethasone, Impurities

Dexamethasone EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 24916-90-3

Mol F.

: C22H28O5

Mol W.

: 372.45

Cat No.

: SA15509

Dexamethasone, Impurities

Dexamethasone EP Impurity E

$255.00 25 mg

In Stock

CAS No.

: 13209-41-1

Mol F.

: C22H28O4

Mol W.

: 356.46

Cat No.

: SA15517

Dexamethasone, Impurities

Dexamethasone EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 1177-87-3

Mol F.

: C24H31FO6

Mol W.

: 434.5

Cat No.

: SA15520

Dexamethasone, Impurities

Dexamethasone EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 10106-41-9

Mol F.

: C24H30O5

Mol W.

: 398.49

Cat No.

: SA15521

Dexamethasone, Impurities

Dexamethasone EP Impurity I

Please enquire for price & pack size

In Stock

CAS No.

: 14622-47-0

Mol F.

: C₂₂H₂₈O₅

Mol W.

: 372.45

Cat No.

: SA15514

Dexamethasone, Impurities

Dexamethasone EP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: 2036-77-3

Mol F.

: C₂₂H₂₈O₅

Mol W.

: 372.45

Cat No.

: SA15510

Dexamethasone, Impurities

Dexamethasone ethyl ester

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C22H29FO5

Mol W.

: 406.488

Cat No.

: SA15530

Dexamethasone, Impurities

Dexamethasone Oxetanone

Please enquire for price & pack size

In Stock

CAS No.

: 4089-36-5

Mol F.

: C22H27FO4

Mol W.

: 374.44

Cat No.

: SA15516

Dexamethasone, Impurities

Dexamethasone Phosphate

Please enquire for price & pack size

In Stock

CAS No.

: 312-93-6

Mol F.

: C22H30FO8P

Mol W.

: 472.44

Cat No.

: SA15542

Dexamethasone, Impurities

Dexamethasone Phosphate EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 360-63-4

Mol F.

: C22H30FO8P

Mol W.

: 472.45

Cat No.

: SA15541

Dexamethasone, Impurities

Dexamethasone Sodium Phosphate EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 162968-22-1

Mol F.

: C22H32FO8P

Mol W.

: 474.46

Cat No.

: SA15543

Dexamethasone

Dexamethasone-∆17,20 21-Aldehyde

$295.00 25 mg

In Stock

CAS No.

: 6762-51-2

Mol F.

: C₂₂H₂₇FO₄

Mol W.

: 374.45

Cat No.

: SA15504

Linagliptin

Di-butynyl linagliptin/Impurity V; Linagliptin Impurity 94

$155.00 50 mg

In Stock

CAS No.

: 2749409-37-6

Mol F.

: C19H24N6O2

Mol W.

: 368.4

Cat No.

: SA49931

Colesevelam, Impurities

Di-decylamine hydrochloride

$70.00 25 mg

In Stock

CAS No.

: 2486-84-2

Mol F.

: C20H43N

Mol W.

: 297.56

Cat No.

: SA10206

Impurities, Neomycin

Di-N-Boc Neomycin Impurity 2

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C21H38N2O11

Mol W.

: 494.53

Cat No.

: SA51407

Diacerein, Impurities

Diacerein EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 13928-72-8

Mol F.

: C35H36O16

Mol W.

: 712.65

Cat No.

: SA11002

Diacerein, Impurities

Diacerin EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 64951-96-8

Mol F.

: C37H38O17

Mol W.

: 754.69

Cat No.

: SA11003