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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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Dapagliflozin, Impurities

Dapagliflozin Nosyl Impurity

$185.00 10 mg

In Stock

CAS No.

Mol F.

: C33H32ClNO14S

Mol W.

: 734.12

Cat No.

: SA15052

Dapagliflozin, Impurities

Dapagliflozin open sugar impurity

Please enquire for price & pack size

In Stock

CAS No.

: 2100872-88-4

Mol F.

: C21H27ClO7

Mol W.

: 426.89

Cat No.

: SA15005

Dapagliflozin

Dapagliflozin Related Compound A – USP; Dapagliflozin Bromolactone impurity

$240.00 10 mg

In Stock

CAS No.

: 1807632-95-6

Mol F.

: C21H25BrO6

Mol W.

: 453.32

Cat No.

: SA15003

Dapagliflozin, Impurities

Dapagliflozin Tetraacetate

$147.00 25 mg

In Stock

CAS No.

: 461432-25-7

Mol F.

: C29H33ClO10

Mol W.

: 577.02

Cat No.

: SA15015

Dapagliflozin, Impurities

Dapagliflozin TNG; α-D-Glucopyranoside

$225.00 10 mg

In Stock

CAS No.

: 714269-58-6

Mol F.

: C30H35ClO11

Mol W.

: 607.05

Cat No.

: SA15033

Dapagliflozin, Impurities

Dapagliflozin Tri acetate

$348.00 25 mg

In Stock

CAS No.

: 1415905-91-7

Mol F.

: C27H31ClO9

Mol W.

: 534.98

Cat No.

: SA15029

Dapagliflozin, Impurities

Dapagliflozin Triacetate Impurity

$170.00 10 mg

In Stock

CAS No.

: 1443341-94-3

Mol F.

: C27H31ClO9

Mol W.

: 535

Cat No.

: SA15050

Darunavir, Impurities

Darunavir Diamino (2R,3R) Isomer

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C20H29N3O3S

Mol W.

: 391.53

Cat No.

: SA39409

Darunavir, Impurities

Darunavir Diamino (2S,3S) Isomer

Please enquire for price & pack size

In Stock

CAS No.

: 192800-79-6

Mol F.

: C20H29N3O3S

Mol W.

: 391.53

Cat No.

: SA39408

Clarithromycin, Impurities

De(cladinosyl) Clarithromycin

Please enquire for price & pack size

In Stock

CAS No.

: 118058-74-5

Mol F.

: C30H55NO10

Mol W.

: 589.76

Cat No.

: SA17204

Impurities, Linezolid

Deacetamide Linezolid Azide

Please enquire for price & pack size

In Stock

CAS No.

: 168828-84-0

Mol F.

: C₁₄H₁₆FN₅O₃

Mol W.

: 321.31

Cat No.

: SA17514

Impurities, Linezolid

Deacetamide Linezolid Phthalimide

Please enquire for price & pack size

In Stock

CAS No.

: 168828-89-5

Mol F.

: C₂₂H₂₀FN₃O₅

Mol W.

: 425.41

Cat No.

: SA17513

Diltiazem, Impurities

Deacetyl Diltiazem N-Oxide

$255.00 25 mg

In Stock

CAS No.

: 122619-90-3

Mol F.

: C20H24N2O4S

Mol W.

: 388.48

Cat No.

: SA19514

Linezolid

Deacetyl Linezolid

Please enquire for price & pack size

In Stock

CAS No.

: 168828-90-8

Mol F.

: C₁₄H₁₈FN₃O₃

Mol W.

: 295.31

Cat No.

: SA17511

Diltiazem, Impurities

Deacetyl-O-demethyl Diltiazem

$295.00 25 mg

In Stock

CAS No.

: 142926-10-1 (HBr); 84903-82-2

Mol F.

: C19H22N2O3S

Mol W.

: 358.46

Cat No.

: SA19513

Impurities, Telmisartan

Debenzoic Acid Bromotelmisartan

Please enquire for price & pack size

In Stock

CAS No.

: 1004548-55-3

Mol F.

: C₂₆H₂₅BrN₄

Mol W.

: 473.41

Cat No.

: SA33919

Impurities, Loteprednol

Dechloromethyl Loteprednol Etabonate; Prednisolone 17-acid-17-ethylcarbonate

Please enquire for price & pack size

In Stock

CAS No.

: 133991-63-6

Mol F.

: C23H30O7

Mol W.

: 418.48

Cat No.

: SA27605

Colesevelam

Decyl Aminoquat

$400.00 25 mg

In Stock

CAS No.

: NA

Mol F.

: C19H43BrN2

Mol W.

: 379.46

Cat No.

: SA10203

Colesevelam, Impurities

Decylamine hydrochloride

$70.00 25 mg

In Stock

CAS No.

: 143-09-9

Mol F.

: C10H24NCl

Mol W.

: 192.75

Cat No.

: SA10205

Deferasirox, Impurities

Deferasirox 1,2-isomer

Please enquire for price & pack size

In Stock

CAS No.

: 201530-78-1

Mol F.

: C21H15N3O4

Mol W.

: 373.36

Cat No.

: SA25106

Deferasirox, Impurities

Deferasirox 1,3-isomer

Please enquire for price & pack size

In Stock

CAS No.

: 2254105-61-6

Mol F.

: C21H15N3O4

Mol W.

: 373.36

Cat No.

: SA25107

Deferasirox, Impurities

Deferasirox Benzamide Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 65-45-2

Mol F.

: C7H7NO2

Mol W.

: 137.14

Cat No.

: SA25112

Deferasirox, Impurities

Deferasirox Benzoxazin Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1218-69-5

Mol F.

: C14H9NO3

Mol W.

: 239.23

Cat No.

: SA25101

Deferasirox, Impurities

Deferasirox Diacyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1972-71-0

Mol F.

: C14H11NO4

Mol W.

: 257.24

Cat No.

: SA25104

Deferasirox, Impurities

Deferasirox Ethyl Ester

Please enquire for price & pack size

In Stock

CAS No.

: 201530-79-2

Mol F.

: C23H19N3O4

Mol W.

: 401.41

Cat No.

: SA25102

Dolutegravir, Impurities

Defluoro Dolutegravir

Please enquire for price & pack size

In Stock

CAS No.

: 1863916-88-4

Mol F.

: C20H20FN3O5

Mol W.

: 401.39

Cat No.

: SA20209

Impurities, Linezolid

Defluoro Linezolid

Please enquire for price & pack size

In Stock

CAS No.

: 556801-15-1

Mol F.

: C₁₆H₂₁N₃O₄

Mol W.

: 319.36

Cat No.

: SA17502

Donepezil

Dehydro Deoxy Donepezil Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 120013-45-8

Mol F.

: C24H29NO2

Mol W.

: 363.49

Cat No.

: SA34311

Impurities, Isoproterenol

Dehydroxy Isoproterenol

Please enquire for price & pack size

In Stock

CAS No.

: 3506-32-9(Base);5178-52-9(HClsalt)

Mol F.

: C11H17NO2

Mol W.

: 195.26

Cat No.

: SA25902

Penciclovir

Dehydroxy-(chloro) Penciclovir; Penciclovir Impurity A

$125.00 25 mg

In Stock

CAS No.

: 100199-40-4

Mol F.

: C10H14ClN5O2

Mol W.

: 271.7

Cat No.

: SA27700

Cortisone Acetate, Impurities

Delta 6,7 Cortisone Acetate

Please enquire for price & pack size

In Stock

CAS No.

: 2435-02-1

Mol F.

: C23H28O6

Mol W.

: 400.47

Cat No.

: SA43203

Cortisone Acetate, Impurities

Delta 8,9 Cortisone Acetate

Please enquire for price & pack size

In Stock

CAS No.

: 1856-26-4

Mol F.

: C23H28O6

Mol W.

: 400.5

Cat No.

: SA43202

Betamethasone, Impurities

Delta-16, 17-Betamethasone, Δ16, 17-Betamethasone

$1,095.00 25 mg

In Stock

CAS No.

: 59860-99-0

Mol F.

: C22H27FO4

Mol W.

: 374.45

Cat No.

: SA26614

Donepezil

Deoxy Donepezil Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 844694-84-4(base)

Mol F.

: C24H31NO2

Mol W.

: 365.51

Cat No.

: SA34312

Impurities, Ursodiol

Deoxycholic acid

Please enquire for price & pack size

In Stock

CAS No.

: 83-44-3

Mol F.

: C24H40O4

Mol W.

: 392.57

Cat No.

: SA31205

Alcaftadine, Impurities

Des Carbaldehyde Alcaftadine

Please enquire for price & pack size

In Stock

CAS No.

: 147083-12-3

Mol F.

: C18H23N3

Mol W.

: 281.4

Cat No.

: SA31006

Ezetimibe, Impurities

Des F-A Ezetimibe

Please enquire for price & pack size

In Stock

CAS No.

: 163222-31-9

Mol F.

: C24H20FNO3

Mol W.

: 389.4

Cat No.

: SA14850

Ezetimibe, Impurities

Des F-B Ezetimibe 29

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C24H20FNO3

Mol W.

: 389.4

Cat No.

: SA14851

Impurities, Valsartan

Des-[(S)-3-Methyl-2-pentanamidobutanoic Acid] Valsartan 4-Azidomethyl

$255.00 50 mg

In Stock

CAS No.

: 152708-24-2

Mol F.

: C14H11N7

Mol W.

: 277.28

Cat No.

: SA33318

Fosaprepitant, Impurities

Des-fluoro CAH Impurity

$450.00 25 mg

In Stock

CAS No.

: 171338-33-3

Mol F.

: C20H19F6NO2

Mol W.

: 419.36

Cat No.

: SA45408

Fluticasone Furoate, Impurities

Des-Fluoromethyl S-Methyl Fluticasone Furoate

$250.00 25 mg

In Stock

CAS No.

: 397864-58-3

Mol F.

: C27H30F2O6S

Mol W.

: 520.59

Cat No.

: SA48211

Empagliflozin

Des(1,5-anhydro-D-glucitol) Empagliflozin

$230.00 25 mg

In Stock

CAS No.

: 2517968-35-1

Mol F.

: C17H17ClO2

Mol W.

: 288.77

Cat No.

: SA15101

Empagliflozin

Des(1,5-anhydro-D-glucitol)-bromo Empagliflozin

$169.00 25 mg

In Stock

CAS No.

: 915095-89-5

Mol F.

: C17H16BrClO2

Mol W.

: 367.66

Cat No.

: SA15111

Losartan

Des[2-(1H-tetrazol-5-yl)] 2-Cyanolosartan Carboxaldehyde

$125.00 10 mg

In Stock

CAS No.

: 124750-67-0

Mol F.

: C22H20ClN3O

Mol W.

: 377.872

Cat No.

: SA26727

Impurities, Losartan

Des[2′-(1H-tetrazol-5-yl)] 2-cyanolosartan

$155.00 25 mg

In Stock

CAS No.

: 114772-55-3

Mol F.

: C22H22ClN3O

Mol W.

: 379.88

Cat No.

: SA26724

Diltiazem, Impurities

Des[5-(2-dimethylamino)ethyl] Diltiazem; Diltiazem EP Impurity B

$95.00 25 mg

In Stock

CAS No.

: 87447-47-0

Mol F.

: C18H17NO4S

Mol W.

: 343.4

Cat No.

: SA19506

Diltiazem, Impurities

Des[5-(2-dimethylamino)ethyl] N-ethene Diltiazem

$395.00 25 mg

In Stock

CAS No.

Mol F.

: C20H19NO4S

Mol W.

: 369.44

Cat No.

: SA19509

Diltiazem, Impurities

Des[5-(2-dimethylamino)ethyl] N-Methyl Diltiazem

$255.00 25 mg

In Stock

CAS No.

: 2067323-40-2; 30842-48-9

Mol F.

: C19H19NO4S

Mol W.

: 357.43

Cat No.

: SA19508

Diltiazem, Impurities

Desacetyl N,O-didesmethyl diltiazem

$295.00 25 mg

In Stock

CAS No.

: 86408-42-6; 142926-09-8 (HCl Salt)

Mol F.

: C18H20N2O3S

Mol W.

: 344.43

Cat No.

: SA19522

Donepezil

Desbenzyl Donepezil Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 120013-39-0

Mol F.

: C₁₇H₂₄ClNO₃

Mol W.

: 325.83

Cat No.

: SA34300