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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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Fluticasone Propionate, Impurities

Fluticasone Propionate EP Impurity E

$300.00 25 mg

In Stock

CAS No.

: 105613-90-9

Mol F.

: C25H33F3O5S

Mol W.

: 502.59

Cat No.

: SA47006

Fluticasone Propionate, Impurities

Fluticasone Propionate EP Impurity F

$300.00 25 mg

In Stock

CAS No.

: 1219174-94-3

Mol F.

: C25H29F3O5S

Mol W.

: 498.55

Cat No.

: SA47007

Fluticasone Propionate, Impurities

Fluticasone Propionate Fluoromethyl Ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1174034-79-7

Mol F.

: C25H31F3O6

Mol W.

: 484.51

Cat No.

: SA47026

Fluticasone Propionate, Impurities

Fluticasone Propionate Iodomethyl Impurity

$300.00 25 mg

In Stock

CAS No.

: 80474-67-5

Mol F.

: C25H31F2IO5S

Mol W.

: 608.48

Cat No.

: SA47014

Fluticasone Propionate, Impurities

Fluticasone USP Related Compound B

$300.00 25 mg

In Stock

CAS No.

: 219719-95-6

Mol F.

: C22H24F2O5S

Mol W.

: 438.48

Cat No.

: SA47027

Aminocaproic Acid, Impurities

Fmoc-6-aminohexanoic acid

Please enquire for price & pack size

In Stock

CAS No.

: 88574-06-5

Mol F.

: C₂₁H₂₃NO₄

Mol W.

: 353.41

Cat No.

: SA22604

Formoterol, Impurities

Formoterol Dimer (n-1) Intermediate

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C65H70N4O6

Mol W.

: 1003.27

Cat No.

: SA21111

Formoterol, Impurities

Formoterol Fumarate EP Impurity F

$1,100.00 25 mg

In Stock

CAS No.

: 1795129-59-7

Mol F.

: C37H46N4O6

Mol W.

: 642.8

Cat No.

: SA21106

Formoterol, Impurities

Formoterol Fumarate Impurity A

$350.00 25 mg

In Stock

CAS No.

: 150513-24-9

Mol F.

: C18H24N2O3

Mol W.

: 316.39

Cat No.

: SA21101

Formoterol, Impurities

Formoterol Fumarate Impurity B

$350.00 25 mg

In Stock

CAS No.

: 1224588-66-2

Mol F.

: C18H22N2O4

Mol W.

: 330.38

Cat No.

: SA21102

Formoterol, Impurities

Formoterol Fumarate Impurity C

$300.00 25 mg

In Stock

CAS No.

: 1795135-61-3

Mol F.

: C₂₀H₂₆N₂O₄

Mol W.

: 358.43,

Cat No.

: SA21103

Formoterol, Impurities

Formoterol Fumarate Impurity D

$200.00 25 mg

In Stock

CAS No.

: 1795133-96-8

Mol F.

: C20H26N2O4

Mol W.

: 358.44

Cat No.

: SA21104

Formoterol, Impurities

Formoterol Fumarate Impurity E

$600.00 25 mg

In Stock

CAS No.

: 1616967-26-0

Mol F.

: C20H26N2O4

Mol W.

: 358.43

Cat No.

: SA21105

Formoterol, Impurities

Formoterol Fumarate Impurity G

$150.00 25 mg

In Stock

CAS No.

: 64-13-1

Mol F.

: C10H15NO

Mol W.

: 165.23

Cat No.

: SA21107

Formoterol, Impurities

Formoterol Fumarate Impurity H

$300.00 25 mg

In Stock

CAS No.

: 1337876-26-2

Mol F.

: C26H30N2O4

Mol W.

: 434.54

Cat No.

: SA21108

Formoterol, Impurities

Formoterol Fumarate Impurity I

$600.00 25 mg

In Stock

CAS No.

: 532414-36-1

Mol F.

: C19H24N2O4

Mol W.

: 344.41

Cat No.

: SA21109

Fosaprepitant, Impurities

Fosaprepitant (Morpholine Nitroso Intermediate)

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C20H17F7N2O3

Mol W.

: 466.35

Cat No.

: SA45428

Fosaprepitant, Impurities

Fosaprepitant Diastereomer impurity

$850.00 25 mg

In Stock

CAS No.

: 1523569-90-5

Mol F.

: C23H22F7N4O6P.2C7H17NO5

Mol W.

: 1004.83

Cat No.

: SA45406

Fosaprepitant, Impurities

Fosaprepitant Dibenzyl Phosphate Ester Impurity

$250.00 25 mg

In Stock

CAS No.

: 265121-01-5

Mol F.

: C37H34F7N4O6P

Mol W.

: 794.65

Cat No.

: SA45407

Fosaprepitant, Impurities

Fosaprepitant Dimeglumine impurity F

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C44H62F7N6O16P

Mol W.

: 1094.96 (Dimeglumine salt); 704.53 (Free Base)

Cat No.

: SA45427

Fosaprepitant, Impurities

Fosaprepitant Enantiomer

$750.00 25 mg

In Stock

CAS No.

: 1523569-86-9; 1523569-87-0 [Salt]

Mol F.

: C37H56F7N6O16P

Mol W.

: 1004.83●614.41 (Free base)

Cat No.

: SA45418

Fosaprepitant, Impurities

Fosaprepitant Ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1803189-49-2

Mol F.

: C24H25F7N4O4

Mol W.

: 566.47

Cat No.

: SA45404

Fosaprepitant, Impurities

Fosaprepitant Impurity A

$450.00 25 mg

In Stock

CAS No.

: 170902-81-5

Mol F.

: C23H21F7N4O3

Mol W.

: 534.43

Cat No.

: SA45410

Fosaprepitant, Impurities

Fosaprepitant Impurity C

$100.00 25 mg

In Stock

CAS No.

: 170729-80-3

Mol F.

: C23H21F7N4O3

Mol W.

: 534.43

Cat No.

: SA45411

Fosfomycin, Impurities

Fosfomycin EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 84954-80-3 (acid)

Mol F.

: C3H15N2O5P

Mol W.

: 190.14

Cat No.

: SA46800

Fosfomycin, Impurities

Fosfomycin EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1262243-11-7

Mol F.

: C7H18NO7P

Mol W.

: 259.19

Cat No.

: SA46802

Fulvestrant, Impurities

Fulvestrant

$200.00 25 mg

In Stock

CAS No.

: 129453-61-8

Mol F.

: C32H47F5O3S

Mol W.

: 606.77

Cat No.

: SA11810

Fulvestrant, Impurities

Fulvestrant 9-Sulfone

$250.00 25 mg

In Stock

CAS No.

: 98008-06-1

Mol F.

: C32H47F5O4S

Mol W.

: 622.77

Cat No.

: SA11805

Fulvestrant, Impurities

Fulvestrant Extended

$1,100.00 25 mg

In Stock

CAS No.

Mol F.

: C41H65F5O4S2

Mol W.

: 781.07

Cat No.

: SA11804

Fulvestrant, Impurities

Fulvestrant Impurity – 12 (17-alpha isomer)

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C29H43BrO3

Mol W.

: 519.55

Cat No.

: SA11822

Fulvestrant, Impurities

Fulvestrant Impurity 6

Please enquire for price & pack size

In Stock

CAS No.

: 741246-55-9

Mol F.

: C10H23BrN2OS

Mol W.

: 299.27 (HBr salt); 218.36 (Free base)

Cat No.

: SA11820

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

Please enquire for price & pack size

In Stock

CAS No.

: 64744-50-9

Mol F.

: C9H15NO

Mol W.

: 153.22

Cat No.

: SA22801

Gatifloxacin, Impurities

Gatifloxacin Desethylene Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 172426-87-8

Mol F.

: C17H20FN3O4

Mol W.

: 349.36

Cat No.

: SA37907

Gatifloxacin, Impurities

Gatifloxacin Despropylene Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 172426-86-7

Mol F.

: C16H18FN3O4

Mol W.

: 335.33

Cat No.

: SA37908

Gatifloxacin, Impurities

Gatifloxacin Propionic Acid Analog

Please enquire for price & pack size

In Stock

CAS No.

: NA

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

Please enquire for price & pack size

In Stock

CAS No.

: 108-91-8

Mol F.

: C†HƒN

Mol W.

: 99.17

Cat No.

: SA38602

Glipizide, Impurities

Glipizide EP Impurity C

Please enquire for price & pack size

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

Please enquire for price & pack size

In Stock

CAS No.

: 1346600-54-1

Mol F.

: C„H†N„OƒS

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.

: C‚H‚‡N…O„S

Mol W.

: 445.54

Cat No.

: SA38605

Glipizide, Impurities

Glipizide EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 192118-08-4

Mol F.

: CH†N‚O„S

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

Please enquire for price & pack size

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

Please enquire for price & pack size

In Stock

CAS No.

: 10079-35-3

Mol F.

: C‚‚Hƒ„N„O„S

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

Impurities, Neomycin

Hexa-N-(benzyloxycarbonyl)neomycin B

Please enquire for price & pack size

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