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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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Ganciclovir, Impurities

N-Carbobenzyloxy-L-valinyl-ganciclovir

Please enquire for price & pack size

Out of Stock

CAS No.

: 194154-40-0

Mol F.

: C₂₂H₂₈N₆O₇

Mol W.

: 488.49

Cat No.

: SA13702

Ciprofloxacin, Impurities

N-Cyclopropy Analog

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Out of Stock

CAS No.

: 1502292-84-3

Mol F.

: C10H12FNO

Mol W.

: 181.21

Cat No.

: SA42011

Dapoxetine, Impurities

N-Demethyl Dapoxetine Hydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 119357-18-5

Mol F.

: C20H22ClNO

Mol W.

: 327.85

Cat No.

: SA23006

Impurities, Linezolid

N-Desacetyl-N,O-descarbonyl O-Acetyl Linezolid

Please enquire for price & pack size

Out of Stock

CAS No.

: 333753-71-2

Mol F.

: C₁₅H₂₂FN₃O₃

Mol W.

: 311.35

Cat No.

: SA17509

Brinzolamide, Impurities

N-Desethyl Brinzolamide Impurity; Brinzolamide USP Related Compound B

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Out of Stock

CAS No.

: 404034-55-5

Mol F.

: C10H17N3O5S3

Mol W.

: 355.45

Cat No.

: SA47204

Impurities, Metoclopramide

N-Desethyl Metoclopramide

Please enquire for price & pack size

Out of Stock

CAS No.

: 27260-19-1

Mol F.

: C₁₂H₁₈ClN₃O₂

Mol W.

: 271.74

Cat No.

: SA30610

Impurities, Sunitinib

N-Desethyl N-Butoxycarbonyl Sunitinib

Please enquire for price & pack size

Out of Stock

CAS No.

: 1246833-23-7

Mol F.

: C25H31FN4O4

Mol W.

: 740.54

Cat No.

: SA39601

Dasatinib, Impurities

N-Deshydroxyethyl Dasatinib

Please enquire for price & pack size

Out of Stock

CAS No.

: 910297-51-7

Mol F.

: C‚€H‚‚ClN‡OS

Mol W.

: 443.95

Cat No.

: SA40505

Impurities, Terbinafine

N-Desmethyl cis-Terbinafine

Please enquire for price & pack size

Out of Stock

CAS No.

: 114311-72-7

Mol F.

: C20H23N

Mol W.

: 277.70999999999998

Cat No.

: SA25720

Impurities, Terbinafine

N-Desmethyl hydroxy terbinafine

Please enquire for price & pack size

Out of Stock

CAS No.

: 162227-14-7

Mol F.

: C20H23NO

Mol W.

: 293.4

Cat No.

: SA25709

Impurities, Lercanidipine

N-Desmethyl Lercanidipine N-Nitroso

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C35H38N4O7

Mol W.

: 626.7

Cat No.

: SA50917

Doxepin, Impurities

N-Desmethyl N-Ethyl Doxepin

Please enquire for price & pack size

Out of Stock

CAS No.

: 70805-90-2

Mol F.

: C20H23NO

Mol W.

: 293.39

Cat No.

: SA29905

Impurities, Rosuvastatin

N-Desmethyl N-ethyl Rosuvastatin Sodium Salt

$1,950.00 25 mg

Out of Stock

CAS No.

Mol F.

: C23H29FN3NaO6S

Mol W.

: 517.55

Cat No.

: SA12139

Impurities, Ondansetron

N-Desmethyl Ondansetron

Please enquire for price & pack size

Out of Stock

CAS No.

: 9614-14-9

Mol F.

: C17H17N3O

Mol W.

: 279.33999999999997

Cat No.

: SA35808

Impurities, Ribociclib

N-Desmethyl Ribociclib

Please enquire for price & pack size

Out of Stock

CAS No.

: 1211441-59-6

Mol F.

: C22H28N8O

Mol W.

: 420.52

Cat No.

: SA47104

Impurities, Riociguat

N-Desmethyl Riociguat

Please enquire for price & pack size

Out of Stock

CAS No.

: 625115-49-3

Mol F.

: C20H19FN8O2

Mol W.

: 422.4

Cat No.

: SA50806

Impurities, Rosuvastatin

N-Desmethyl Rosuvastatin Disodium Salt Monohydrate

$750.00 25 mg

Out of Stock

CAS No.

: 371775-74-5(Acid)

Mol F.

: C21H23FN3Na2O7S

Mol W.

: 529.49

Cat No.

: SA12119

Impurities, Rosuvastatin

N-Desmethyl Rosuvastatin Lactone

$750.00 25 mg

Out of Stock

CAS No.

: 1797419-58-9

Mol F.

: C21H24FN3O5S

Mol W.

: 449.5

Cat No.

: SA12138

Impurities, Tamoxifen

N-Desmethyl Tamoxifen

Please enquire for price & pack size

Out of Stock

CAS No.

: 15917-65-4;31750-48-8

Mol F.

: C25H27NO

Mol W.

: 357.49

Cat No.

: SA35506

Impurities, Ulipristal

N-Desmethyl Ulipristal

Please enquire for price & pack size

Out of Stock

CAS No.

: 159681-67-1

Mol F.

: C27H33NO3

Mol W.

: 419.55

Cat No.

: SA27905

Impurities, Ulipristal

N-Desmethyl Ulipristal Acetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 159681-66-0

Mol F.

: C29H35NO4

Mol W.

: 461.59

Cat No.

: SA27903

Doxepin, Impurities

N-Desmethyl-N-formyl Doxepin

Please enquire for price & pack size

Out of Stock

CAS No.

: 250331-52-3

Mol F.

: C19H19NO2

Mol W.

: 293.36

Cat No.

: SA29908

Impurities, Nitrosamine

N-Ethyl-N-(3-carboxypropyl)nitrosamine

Please enquire for price & pack size

Out of Stock

CAS No.

: 54897-63-1

Mol F.

: C6H12N2O3

Mol W.

: 160.16999999999999

Cat No.

: SA44648

Impurities, Nitrosamine

N-ethyl-N-isopropylnitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

: 16339-04-1

Mol F.

: C5H12N2O

Mol W.

: 116.16

Cat No.

: SA44602

Impurities, Sumatriptan

N-Ethylisopropylamine

Please enquire for price & pack size

Out of Stock

CAS No.

: 19961-27-4

Mol F.

: C5H13N

Mol W.

: 87.2

Cat No.

: SA33319

Atomoxetine, Impurities

N-Formyl Atomoxetine

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C18H21NO2

Mol W.

: 283.36

Cat No.

: SA22117

Fingolimod, Impurities

N-Formyl Fingolimod Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C20H33NO3

Mol W.

: 335.48

Cat No.

: SA34515

Impurities, Lenalidomide

N-Formyl Lenalidomide Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 2197414-56-3

Mol F.

: C14H13N3O4

Mol W.

: 287.27

Cat No.

: SA34107

Impurities, Pregabalin

N-Formyl Pregabalin

Please enquire for price & pack size

Out of Stock

CAS No.

: 1488274-42-5

Mol F.

: C9H17NO3

Mol W.

: 187.2

Cat No.

: SA24845

Impurities, Sitagliptin

N-Formyl Sitagliptin

$395.00 25 mg

Out of Stock

CAS No.

Mol F.

: C17H15F6N5O2

Mol W.

: 435.32

Cat No.

: SA10423

Impurities, Trimetazidine

N-Formyl Trimetazidine Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 879646-17-0

Mol F.

: C15H22N2O4

Mol W.

: 294.35

Cat No.

: SA35112

Impurities, Nicotine

N-Formylnornicotine

Please enquire for price & pack size

Out of Stock

CAS No.

: 3000-81-5

Mol F.

: C₁₀H₁₂N₂O

Mol W.

: 176.22

Cat No.

: SA32211

Impurities, Lenalidomide

N-Glucoside Lenalidomide Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C19H23N3O8

Mol W.

: 421.4

Cat No.

: SA34101

Fingolimod, Impurities

N-Hydroxy Fingolimod Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C19H33NO3

Mol W.

: 323.47000000000003

Cat No.

: SA34516

Impurities, Lenalidomide

N-Hydroxy Lenalidomide Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C₁₃H₁₃N₃O₄

Mol W.

: 275.26

Cat No.

: SA34102

Impurities, Palbociclib

N-Hydroxy Palbociclib

Please enquire for price & pack size

Out of Stock

CAS No.

: 2231085-26-8

Mol F.

: C‚„H‚‰N‡Oƒ

Mol W.

: 463.53

Cat No.

: SA40409

Impurities, Sulfamethoxazole

N-Hydroxy Sulfamethoxazole

Please enquire for price & pack size

Out of Stock

CAS No.

: 114438-33-4

Mol F.

: C10H11N3O4S

Mol W.

: 269.28

Cat No.

: SA25506

Carvedilol, Impurities

N-Isopropyl Carvedilol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1246819-01-1

Mol F.

: C₂₇H₃₂N₂O₄

Mol W.

: 448.55

Cat No.

: SA31710

Impurities, Lenalidomide

N-Methyl Lenalidomide Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 2197421-58-0

Mol F.

: C14H15N3O3

Mol W.

: 273.29000000000002

Cat No.

: SA34103

Impurities, Paroxetine

N-Methyl Paroxetine

$99.00 25 mg

Out of Stock

CAS No.

: 110429-36-2

Mol F.

: C20H22FNO3

Mol W.

: 343.4

Cat No.

: SA18316

Ganciclovir, Impurities

N-Methyl Valganciclovir Hydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 1401562-16-0

Mol F.

: C₁₅H₂₄N₆O₅.HCl

Mol W.

: 368.39

Cat No.

: SA13717

Impurities, Varenicline

N-methyl varenicline Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 328055-92-1

Mol F.

: C„H…Nƒ

Mol W.

: 225.29

Cat No.

: SA39510

Impurities, Nitrosamine

N-Methyl-N-nitroso-2-propanamine

Please enquire for price & pack size

Out of Stock

CAS No.

: 30533-08-5

Mol F.

: C4H10N2O

Mol W.

: 102.14

Cat No.

: SA44645

Impurities, Nitrosamine

N-methyl-N-phenylnitrous amide

Please enquire for price & pack size

Out of Stock

CAS No.

: 614-00-6

Mol F.

: C7H8N2O

Mol W.

: 136.15

Cat No.

: SA446107

Impurities, Saxagliptin

N-methylcyanamide Saxagliptin carboxylic acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C19H25N3O4

Mol W.

: 359.42

Cat No.

: SA27408

Impurities, Linagliptin

N-Nitoso Linagliptin N-Alkyl Dimer Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C51H55N17O5

Mol W.

: 986.09

Cat No.

: SA49954

Impurities, Nitrosamine

N-Nitrosamine piperazine ethanol | CAS :48121-20-6

Please enquire for price & pack size

Out of Stock

CAS No.

: 48121-20-6

Mol F.

: C6H13N3O2

Mol W.

: 159.19

Cat No.

: SA446108

Impurities, Tranexamic Acid

N-Nitrosamine Tranexamic Acid Dimer

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H26N2O5

Mol W.

: 326.39

Cat No.

: SA17409

Amlodipine, Impurities

N-Nitroso Amlodipine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H24ClN3O6

Mol W.

: 437.88

Cat No.

: SA30518

Aripiprazole, Impurities

N-Nitroso Aripiprazole EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C10H11Cl2N3O

Mol W.

: 260.12

Cat No.

: SA24028