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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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Fosaprepitant, Impurities

Fosaprepitant desfluoro impuirty

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Out of Stock

CAS No.

: NA

Mol F.

: C23H23F6N4O6P

Mol W.

: 596.41999999999996

Cat No.

: SA45405

Fosaprepitant, Impurities

Fosaprepitant Dibenzyl Ester Impurity

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Out of Stock

CAS No.

: 265121-01-5

Mol F.

: C37H34F7N4O6P

Mol W.

: 794.7

Cat No.

: SA45403

Fosaprepitant, Impurities

Fosaprepitant Impurity B

$350.00 25 mg

Out of Stock

CAS No.

: 219821-37-1

Mol F.

: C24H25F7N4O4

Mol W.

: 566.47

Cat No.

: SA45413

Fosaprepitant, Impurities

Fosaprepitant Impurity D

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Out of Stock

CAS No.

: NA

Mol F.

: C23H22F7N4O6P

Mol W.

: 614.41

Cat No.

: SA45412

Fosaprepitant, Impurities

Fosaprepitant Monobenzyl Ester Impurity

$450.00 25 mg

Out of Stock

CAS No.

: 889852-02-2

Mol F.

: C30H28F7N4O6P

Mol W.

: 704.53

Cat No.

: SA45409

Fosfomycin, Impurities

Fosfomycin Cis-Propenyl Impurity

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Out of Stock

CAS No.

: 933443-26-6

Mol F.

: C11H18NO3P

Mol W.

: 243.24

Cat No.

: SA46806

Fosfomycin, Impurities

Fosfomycin EP Impurity A (R,R)-Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 132125-60-1 (acid); 1160525-87-0 (diammonium salt)

Mol F.

: C3H15N2O5P

Mol W.

: 190.14

Cat No.

: SA46801

Fosfomycin, Impurities

Fosfomycin EP Impurity C

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Out of Stock

CAS No.

: 114252-50-5 (barium); 23001-39-0 (acid)

Mol F.

: C4H10BaNO6P

Mol W.

: 336.43

Cat No.

: SA46803

Fosfomycin, Impurities

Fosfomycin EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 1262243-12-8

Mol F.

: C10H25NO11P2

Mol W.

: 397.25

Cat No.

: SA46804

Fosfomycin, Impurities

Fosfomycin Trometamol

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Out of Stock

CAS No.

: 78964-85-9 (Tromethamine Salt); 26016-99-9 (Disodium Salt); 26016-98-8 (Calcium); 23155-02-4 (Acid)

Mol F.

: C7H18NO7P

Mol W.

: 259.19

Cat No.

: SA46805

Fulvestrant, Impurities

Fulvestrant 17-Ketone

Please enquire for price & pack size

Out of Stock

CAS No.

: 403656-89-3

Mol F.

: C32H45F5O3S

Mol W.

: 604.75

Cat No.

: SA11812

Fulvestrant, Impurities

Fulvestrant 3-Sulfate Sodium Salt

Please enquire for price & pack size

Out of Stock

CAS No.

: 403656-83-7

Mol F.

: C32H46F5NaO6S2

Mol W.

: 708.82

Cat No.

: SA11811

Fulvestrant, Impurities

Fulvestrant Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C41H65F5O4S2

Mol W.

Cat No.

: SA11817

Fulvestrant, Impurities

Fulvestrant Impurity D Tetraacetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C53H72O8

Mol W.

: 837.13

Cat No.

: SA11815

Gabapentin, Impurities

Gabapentin

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Out of Stock

CAS No.

: 60142-96-3

Mol F.

: C9H17NO2

Mol W.

: 171.24

Cat No.

: SA22800

Gabapentin, Impurities

Gabapentin 2-Hydroxypropyl Ester

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Out of Stock

CAS No.

: NA

Mol F.

: C₁₁H₂₁NO₃

Mol W.

: 229.32

Cat No.

: SA22808

Gabapentin, Impurities

Gabapentin Di-Nitrile

Please enquire for price & pack size

Out of Stock

CAS No.

: 4172-99-0

Mol F.

: C9H12N2

Mol W.

: 148.19999999999999

Cat No.

: SA22806

Gabapentin, Impurities

Gabapentin EP Impurity B; Gabapentin USP Related Compound B

Please enquire for price & pack size

Out of Stock

CAS No.

: 133481-09-1

Mol F.

: C9H13NO2

Mol W.

: 167.21

Cat No.

: SA22802

Gabapentin, Impurities

Gabapentin EP Impurity D; Gabapentin USP Related Compound D

Please enquire for price & pack size

Out of Stock

CAS No.

: 1076198-17-8

Mol F.

: C18H29NO3

Mol W.

: 307.43

Cat No.

: SA22803

Gabapentin, Impurities

Gabapentin EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 667465-00-1

Mol F.

: C9H14O4

Mol W.

: 186.21

Cat No.

: SA22804

Gabapentin, Impurities

Gabapentin EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 1500558-49-5

Mol F.

: C10H19NO2

Mol W.

: 185.26

Cat No.

: SA22805

Gabapentin, Impurities

Gabapentin Ethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 60175-04-4

Mol F.

: C₁₁H₂₁NO₂

Mol W.

: 199.26

Cat No.

: SA22807

Gabapentin, Impurities

Gabapentin Isopropyl Amide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1281568-83-9

Mol F.

: C₁₃H₂₃NO₃

Mol W.

: 241.33

Cat No.

: SA22813

Dapagliflozin, Impurities

galacto-Dapagliflozin

Please enquire for price & pack size

Out of Stock

CAS No.

: 1408245-02-2

Mol F.

: C21H25ClO6

Mol W.

: 408.873

Cat No.

: SA15042

Ganciclovir, Impurities

Ganciclovir

Please enquire for price & pack size

Out of Stock

CAS No.

: 82410-32-0

Mol F.

: C9H13N5O4

Mol W.

: 255.23

Cat No.

: SA13701

Ganciclovir, Impurities

Ganciclovir divalinate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C19H31N7O6

Mol W.

: 453.5

Cat No.

: SA13714

Ganciclovir, Impurities

Ganciclovir EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 108436-36-8

Mol F.

: C₉H₁₂ClN₅O₃

Mol W.

: 273.68

Cat No.

: SA13709

Ganciclovir, Impurities

Ganciclovir EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 1346598-14-8

Mol F.

: C10H15N5O5

Mol W.

: 285.26

Cat No.

: SA13710

Ganciclovir, Impurities

Ganciclovir EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 73-40-5

Mol F.

: C₅H₅N₅O

Mol W.

: 151.13

Cat No.

: SA13711

Ganciclovir, Impurities

Ganciclovir EP Impurity I

Please enquire for price & pack size

Out of Stock

CAS No.

: 86357-20-2

Mol F.

: C15H21N5O6

Mol W.

: 367.36

Cat No.

: SA13712

Ganciclovir, Impurities

Ganciclovir Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 1797982-93-4

Mol F.

: C₉H₁₀ClN₅O₂

Mol W.

: 255.66

Cat No.

: SA13705

Ganciclovir, Impurities

Ganciclovir Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 194159-18-7

Mol F.

: C12H17N5O5

Mol W.

: 311.29

Cat No.

: SA13707

Ganciclovir, Impurities

Ganciclovir Mono-O-acetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 88110-89-8

Mol F.

: C₁₁H₁₅N₅O₅

Mol W.

: 297.27

Cat No.

: SA13706

Gatifloxacin, Impurities

Gatifloxacin

Please enquire for price & pack size

Out of Stock

CAS No.

: 112811-59-3

Mol F.

: C19H22FN3O4

Mol W.

: 375.39

Cat No.

: SA37900

Gatifloxacin, Impurities

Gatifloxacin N-Methyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 114213-69-3

Mol F.

: C20H24FN3O4

Mol W.

: 389.42

Cat No.

: SA37906

Gemcitabine, Impurities

Gemcitabine 3-Epimer

Please enquire for price & pack size

Out of Stock

CAS No.

: 103882-85-5

Mol F.

: C9H11F2N3O4

Mol W.

: 263.2

Cat No.

: SA44515

Gemcitabine, Impurities

Gemcitabine 5-Benzoate Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 2174019-90-8

Mol F.

: C16H15F2N3O5

Mol W.

: 367.3

Cat No.

: SA44518

Gemcitabine, Impurities

Gemcitabine Diphosphate Choline

Please enquire for price & pack size

Out of Stock

CAS No.

: 1643126-46-8

Mol F.

: C14H24F2N4O10P2

Mol W.

: 508.3

Cat No.

: SA44520

Gemcitabine, Impurities

Gemcitabine EP Impurity B

$795.00 25 mg

Out of Stock

CAS No.

: 122111-05-1 (HCl salt)

Mol F.

: C9H12ClF2N3O4

Mol W.

: 299.66

Cat No.

: SA44514

Gemcitabine, Impurities

Gemcitabine EP Impurity C

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Out of Stock

CAS No.

: 114248-23-6

Mol F.

: C9H10F2N2O5

Mol W.

: 264.18

Cat No.

: SA44517

Gemcitabine, Impurities

Gemcitabine Monophosphate

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Out of Stock

CAS No.

: 116371-67-6

Mol F.

: C9H12F2N3O7P

Mol W.

: 343.18

Cat No.

: SA44516

Gestodene, Impurities

Gestodene

Please enquire for price & pack size

Out of Stock

CAS No.

: 60282-87-3

Mol F.

: C21H26O2

Mol W.

: 310.43

Cat No.

: SA38200

Gestodene, Impurities

Gestodene EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C21H24O2

Mol W.

: 308.41

Cat No.

: SA38201

Gestodene, Impurities

Gestodene EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C21H26O2

Mol W.

: 310.43

Cat No.

: SA38202

Gestodene, Impurities

Gestodene Ep Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H32O3

Mol W.

: 368.51

Cat No.

: SA38203

Gestodene, Impurities

Gestodene EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C21H26O3

Mol W.

: 326.43

Cat No.

: SA38204

Gestodene, Impurities

Gestodene EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 2143949-52-2

Mol F.

: C21H24O3

Mol W.

: 324.41

Cat No.

: SA38205

Gestodene, Impurities

Gestodene EP impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 267650-77-1

Mol F.

: C‚ƒHƒ€O„

Mol W.

: 370.48

Cat No.

: SA38206

Gestodene, Impurities

Gestodene EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 1421283-59-1

Mol F.

: C22H26O2

Mol W.

: 322.44

Cat No.

: SA38207

Gestodene, Impurities

Gestodene EP Impurity H

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C‚ƒH‚†O

Mol W.

: 318.45

Cat No.

: SA38208