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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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Fulvestrant, Impurities

Fulvestrant Sterol Dimer

$295.00 25 mg

In Stock

CAS No.

Mol F.

: C45H64O4

Mol W.

: 668.99

Cat No.

: SA11814

Fulvestrant, Impurities

Fulvestrant-(7Alpha-17Beta)-4-Bromo-7-[9-Bromo-Nonyl]-Estra-1,3,5(10)-Triene-3,17-Diol -17 Acetate

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C29H42Br2O3

Mol W.

: 598.45

Cat No.

: SA11821

Dapagliflozin, Impurities

Furanose DAG5 Impurity

$335.00 25 mg

In Stock

CAS No.

: 2133407-77-7

Mol F.

: C22H27ClO7

Mol W.

: 438.9

Cat No.

: SA15039

Gabapentin, Impurities

Gabapentin EP Impurity A; Gabapentin USP Related Compound A

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In Stock

CAS No.

: 64744-50-9

Mol F.

: C9H15NO

Mol W.

: 153.22

Cat No.

: SA22801

Gatifloxacin, Impurities

Gatifloxacin Desethylene Impurity

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In Stock

CAS No.

: 172426-87-8

Mol F.

: C17H20FN3O4

Mol W.

: 349.36

Cat No.

: SA37907

Gatifloxacin, Impurities

Gatifloxacin Despropylene Impurity

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In Stock

CAS No.

: 172426-86-7

Mol F.

: C16H18FN3O4

Mol W.

: 335.33

Cat No.

: SA37908

Gatifloxacin, Impurities

Gatifloxacin Propionic Acid Analog

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In Stock

CAS No.

Mol F.

: C22H26FN3O6

Mol W.

: 447.5

Cat No.

: SA37909

Impurities, Nitrosamine

Gliclazide EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 54786-86-6

Mol F.

: C7H12N2O

Mol W.

: 140.18

Cat No.

: SA44637

Glipizide, Impurities

Glipizide EP Impurity B

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In Stock

CAS No.

: 108-91-8

Mol F.

: C6H13N

Mol W.

: 99.17

Cat No.

: SA38602

Glipizide, Impurities

Glipizide EP Impurity C

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In Stock

CAS No.

: 13554-93-3

Mol F.

: CˆH‚‡NƒO…S

Mol W.

: 397.49

Cat No.

: SA38603

Glipizide, Impurities

Glipizide EP Impurity D

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In Stock

CAS No.

: 1346600-54-1

Mol F.

: C14H16N4O3S

Mol W.

: 320.37

Cat No.

: SA38604

Glipizide, Impurities

Glipizide EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 66375-96-0

Mol F.

: C21H27N5O4S

Mol W.

: 445.54

Cat No.

: SA38605

Glipizide, Impurities

Glipizide EP Impurity F

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In Stock

CAS No.

: 192118-08-4

Mol F.

: C11H16N2O4S

Mol W.

: 272.32

Cat No.

: SA38606

Glipizide, Impurities

Glipizide EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 33288-74-3

Mol F.

: C†HˆN„O…S

Mol W.

: 378.4

Cat No.

: SA38607

Glipizide, Impurities

Glipizide EP Impurity H

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In Stock

CAS No.

: 10080-05-4

Mol F.

: C…H‚ƒNƒOƒS

Mol W.

: 325.43

Cat No.

: SA38608

Glipizide, Impurities

Glipizide EP Impurity I

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In Stock

CAS No.

: 10079-35-3

Mol F.

: C22H34N4O4S

Mol W.

: 450.59

Cat No.

: SA38609

Impurities, Triamcinolone Acetonide

Halcinonide 21-Methyl Analog

$295.00 25 mg

In Stock

CAS No.

Mol F.

: C24H33FO5

Mol W.

: 420.51

Cat No.

: SA30214

Diflorasone Acetate, Impurities

Halobetasol

Please enquire for price & pack size

In Stock

CAS No.

: 98651-66-2

Mol F.

: C22H27ClF2O4

Mol W.

: 428.9

Cat No.

: SA44406

Impurities, Neomycin

Hexa-N-(benzyloxycarbonyl)neomycin B

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In Stock

CAS No.

: 58096-78-9

Mol F.

: C71H82N6O25

Mol W.

: 1419.44

Cat No.

: SA51403

Hydrochlorothiazide, Impurities

Hydrochlorothiazide 5-Chloro Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 5233-42-1

Mol F.

: C7H7Cl2N3O4S2

Mol W.

: 332.18

Cat No.

: SA11201

Hydrochlorothiazide, Impurities

Hydrochlorothiazide EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 58-94-6

Mol F.

: C7H6ClN3O4S2

Mol W.

: 295.73

Cat No.

: SA11203

Hydrochlorothiazide, Impurities

Hydrochlorothiazide EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 121-30-2

Mol F.

: C₆H₈ClN₃O₄S₂

Mol W.

: 285.73

Cat No.

: SA11204

Hydrocortisone, Impurities

Hydrocortisone 16, 17-hydro-17-carboxylic acid

Please enquire for price & pack size

In Stock

CAS No.

: 2394-25-4

Mol F.

: C20H28O4

Mol W.

: 332.43

Cat No.

: SA15224

Hydrocortisone, Impurities

Hydrocortisone 17-Butyrate 3-Enol Methyl Ether

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C26H38O6

Mol W.

: 446.58

Cat No.

: SA15216

Hydrocortisone Valerate, Impurities

Hydrocortisone 17-Valerate 21-Acetate

Please enquire for price & pack size

In Stock

CAS No.

: 81456-46-4

Mol F.

: C28H40O7

Mol W.

: 488.61

Cat No.

: SA27303

Hydrocortisone, Impurities

Hydrocortisone 17,21-Butarate Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C29H42O7

Mol W.

: 502.64

Cat No.

: SA15220

Hydrocortisone, Impurities

Hydrocortisone 21-Butyrate

$155.00 25 mg

In Stock

CAS No.

: 6677-99-2

Mol F.

: C25H36O6

Mol W.

: 432.55

Cat No.

: SA15201

Hydrocortisone, Impurities

Hydrocortisone 21-Valerate

Please enquire for price & pack size

In Stock

CAS No.

: 6678-00-8

Mol F.

: C26H38O6

Mol W.

: 446.58

Cat No.

: SA15217

Cortisone Acetate, Impurities

Hydrocortisone acetate EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 7753-60-8

Mol F.

: C23H30O5

Mol W.

: 386.49

Cat No.

: SA43201

Hydrocortisone, Impurities

Hydrocortisone Cortienyl Aldehyde Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C20H28O4

Mol W.

: 332.4

Cat No.

: SA15230

Hydrocortisone, Impurities

Hydrocortisone EP Impurity B

$75.00 25 mg

In Stock

CAS No.

: 53-06-5

Mol F.

: C₂₁H₂₈O₅

Mol W.

: 360.44

Cat No.

: SA15203

Hydrocortisone, Impurities

Hydrocortisone EP Impurity C

$25.00 25 mg

In Stock

CAS No.

: 50-03-3

Mol F.

: C23H32O6

Mol W.

: 404.5

Cat No.

: SA15204

Hydrocortisone, Impurities

Hydrocortisone EP Impurity E

$185.00 25 mg

In Stock

CAS No.

: 600-99-7

Mol F.

: C₂₁H₂₈O₅

Mol W.

: 360.44

Cat No.

: SA15206

Hydrocortisone, Impurities

Hydrocortisone EP Impurity F

$95.00 25 mg

In Stock

CAS No.

: 152-58-9

Mol F.

: C21H30O4

Mol W.

: 346.46

Cat No.

: SA15207

Hydrocortisone, Impurities

Hydrocortisone EP Impurity G

$255.00 25 mg

In Stock

CAS No.

: 14760-49-7

Mol F.

: C21H30O6

Mol W.

: 378.46

Cat No.

: SA15208

Hydrocortisone

Hydrocortisone EP Impurity H

$495.00 25 mg

In Stock

CAS No.

Mol F.

: C21H30O6

Mol W.

: 378.46

Cat No.

: SA15209

Hydrocortisone, Impurities

Hydrocortisone EP Impurity N

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C42H58O10

Mol W.

: 722.9

Cat No.

: SA15223

Hydrocortisone, Impurities

Hydrocortisone Impurity L

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In Stock

CAS No.

: 641-77-0

Mol F.

: C21H30O4

Mol W.

: 346.47

Cat No.

: SA15211

Hydrocortisone, Impurities

Hydrocortisone Oxo Acetic Acid

Please enquire for price & pack size

In Stock

CAS No.

: 33762-00-4

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA15229

Bupropion, Impurities

Hydroxy Bupropion

$125.00 25 mg

In Stock

CAS No.

: 357399-43-0

Mol F.

: C13H18ClNO2

Mol W.

: 255.74

Cat No.

: SA12203

Empagliflozin, Impurities

Hydroxy Empagliflozin Impurity

$205.00 25 mg

In Stock

CAS No.

: 1279691-35-8

Mol F.

: C23H27ClO8

Mol W.

: 466.91

Cat No.

: SA15102

Hydroxychloroquine, Impurities

Hydroxychloroquine-N-Oxide

Please enquire for price & pack size

In Stock

CAS No.

: 1449223-88-4

Mol F.

: C18H26ClN3O2

Mol W.

: 351.88

Cat No.

: SA23802

Hydroxychloroquine, Impurities

Hydroxychloroquine-O-Sulphate

Please enquire for price & pack size

In Stock

CAS No.

: 103152-84-7

Mol F.

: C18H25ClN3O4S.Na

Mol W.

: 441.93

Cat No.

: SA23801

Amlodipine, Impurities

Hydroxyethyl Phthalyl Amlodipine

Please enquire for price & pack size

In Stock

CAS No.

: 3079028-35-3

Mol F.

: C30H34ClN3O8

Mol W.

: 600.06

Cat No.

: SA30520

Hydroxyprogesterone Caproate, Impurities

Hydroxyprogesterone Caproate impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 68-96-2

Mol F.

: C21H30O3

Mol W.

: 330.46

Cat No.

: SA18200

Hydroxyprogesterone Caproate, Impurities

Hydroxyprogesterone Caproate impurity E

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C23H29F3O4

Mol W.

: 426.47

Cat No.

: SA18204

Colesevelam, Impurities

Hydroxyquat

$70.00 25 mg

In Stock

CAS No.

: 118843-18-8

Mol F.

: C9H22BrNO

Mol W.

: 240.18

Cat No.

: SA10212

Hyoscine Butylbromide

Hyoscine Butylbromide EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 155-41-9

Mol F.

: C18H24BrNO4

Mol W.

: 398.29

Cat No.

: SA46103

Hyoscine Butylbromide

Hyoscine Butylbromide EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C20H28BrNO4

Mol W.

: 426.34

Cat No.

: SA46104

Hyoscine Butylbromide, Impurities

Hyoscine Butylbromide EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 22235-98-9 (HCl); 14861-14-4 (Base)

Mol F.

: C20H28ClNO4

Mol W.

: 381.89

Cat No.

: SA46105