Active pharmaceutical ingredient (API) impurities for research

All products contained in this category are intended for laboratory use only, and are not meant for human consumption.

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Product data	Purity	Price range	Estimated delivery
Glycopyrrolate Related Compound C (2-Cyclopentyl-2-hydroxy-2-phenylacetic acid) REF: 45-1296042CAS: 427-49-6	- - -	1,477.00 €	Fri 28 Feb 25
Furosemide Related Compound A (2-Chloro-4-N-furfurylamino-5-sulfamoylbenzoic Acid) REF: 45-1287020CAS: 4818-59-1	- - -	1,477.00 €	Fri 28 Feb 25
Selegiline Related Compound D ((R)-N-(1-Phenylpropan-2-yl)prop-2-yn-1-amine hydrochloride) REF: 45-1611944CAS: 115586-38-4	- - -	1,927.00 €	Fri 28 Feb 25
Dolasetron Mesylate Related Compound A (Hexahydro-8-hydroxy-2,6-methano-2H-quinolizin-3 (4H)-one, hydrochloride) REF: 45-1224960CAS: 148091-18-3	- - -	1,371.00 €	Fri 28 Feb 25
Dopamine Related Compound C (2-(3,4-Dimethoxyphenyl)ethan-1-amine) REF: 45-1225237CAS: 120-20-7	- - -	1,733.00 €	Fri 28 Feb 25
Polyallylamine Hydrochloride (2-Propen-1-amine, hydrochloride (1:1), homopolymer) REF: 45-1372333CAS: 71550-12-4	- - -	1,441.00 €	Fri 28 Feb 25
Phenylephrine Related Compound E (2-[Benzyl(methyl)amino]-1-(3-hydroxyphenyl)ethan-1-one hydrochloride) REF: 45-1533046CAS: 71786-67-9	- - -	1,477.00 €	Fri 28 Feb 25
Ecamsule Triethanolamine REF: 45-1231604CAS: 92841-53-7	- - -	478.00 €	Fri 28 Feb 25
Iopamidol Related Compound B (5-Glycolamido-N,N'-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-2,4,6-triiodoisophthalamide) REF: 45-1344735	- - -	1,441.00 €	Fri 28 Feb 25
Mirtazapine Related Compound C (2-Methyl-3,4,10,14b-tetrahydrobenzo[c]pyrazino[1,2-a]pyrido[3,2-f]azepin-1(2H)-one) REF: 45-1444241CAS: 191546-96-0	- - -	1,477.00 €	Fri 28 Feb 25
Risperidone Related Compound G (3-{2-[4-(4-Fluoro-2-hydroxybenzoyl)piperidin-1-yl]ethyl}-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one hydrochloride) REF: 45-1604756CAS: 152542-00-2	- - -	1,371.00 €	Fri 28 Feb 25
Desosaminylazithromycin ((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-Ethyl-3,4,10,13-tetrahydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-dimethylamino-β-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one) REF: 45-1046078CAS: 117693-41-1	- - -	1,371.00 €	Fri 28 Feb 25
Oxybutynin Related Compound B (Cyclohexyl Mandelic Acid Methyl Ester) REF: 45-1485125CAS: 10399-13-0	- - -	1,371.00 €	Fri 28 Feb 25
Isomalathion (Diethyl 2-{[methoxy(methylthio)phosphoryl]thio}succinate) REF: 45-1349604CAS: 3344-12-5	- - -	1,292.00 €	Fri 28 Feb 25
Nabumetone Related Compound A (1-(6-methoxy-2-naphthyl)-but-1-en-3-one) REF: 45-1449530CAS: 127053-22-9	- - -	1,292.00 €	Fri 28 Feb 25
Azelastine Related Compound F (4-[4-(4-Chlorobenzyl)-1-oxophthalazin-2(1H)-yl]-1-methylazepane 1-oxide) REF: 45-1046213CAS: 640279-88-5	- - -	1,292.00 €	Fri 28 Feb 25
Tiotropium Related Compound H ((2RS,3aSR,5RS,6RS,6aRS)-6-Hydroxy-4,4-dimethylhexahydro-2H-2,5-methanofuro[3,2-b]pyrrol-4-ium bromide) REF: 45-1667632	- - -	2,587.00 €	Fri 28 Feb 25
Artemether Related Compound B ((3R,5aS,6R,8aS,9R,10R,12R,12aR)-Decahydro-10-methoxy-3,6,9-trimethyl-3,12-epoxy-12H-pyrano[4,3-j]-1,2-benzodioxepin) REF: 45-1042805CAS: 71939-51-0	- - -	1,371.00 €	Fri 28 Feb 25
4-Hydrazinylbenzenesulfonamide Hydrochloride REF: 45-1313254CAS: 17852-52-7	- - -	1,477.00 €	Fri 28 Feb 25
Medroxyprogesterone Acetate Related Compound B (17-Hydroxy-6α-methylpregn-4-ene-3,20-dione) REF: 45-1378023CAS: 520-85-4	- - -	1,477.00 €	Fri 28 Feb 25

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Glycopyrrolate Related Compound C (2-Cyclopentyl-2-hydroxy-2-phenylacetic acid)

CAS:427-49-6

Carboxylic acids w/ alcohol function but w/o other oxygen function and their derivatives, nesoi

Formula:

C₁₃H₁₆O₃

Color and Shape:

White Off-White Powder

Molecular weight:

220.10994

Ref: 45-1296042

25mg 1,477.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Furosemide Related Compound A (2-Chloro-4-N-furfurylamino-5-sulfamoylbenzoic Acid)

CAS:4818-59-1

Sulfonamides, nesoi

Formula:

C₁₂H₁₁ClN₂O₅S

Color and Shape:

White Off-White Powder

Molecular weight:

330.00772

Ref: 45-1287020

50mg 1,477.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Selegiline Related Compound D ((R)-N-(1-Phenylpropan-2-yl)prop-2-yn-1-amine hydrochloride)

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Selegiline Related Compound D ((R)-N-(1-Phenylpropan-2-yl)prop-2-yn-1-amine hydrochloride)

CAS:115586-38-4

Aromatic monoamines and their derivatives, salts thereof, nesoi

Formula:

C₁₂H₁₅N·HCl

Color and Shape:

White Off-White Powder

Molecular weight:

209.09713

Ref: 45-1611944

15mg 1,927.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Dolasetron Mesylate Related Compound A (Hexahydro-8-hydroxy-2,6-methano-2H-quinolizin-3 (4H)-one, hydrochloride)

CAS:148091-18-3

Heterocyclic compounds (excluding aromatic or modified aromatic) withnitrogen hetero-atom(s) only nesoi

Formula:

C₁₀H₁₅NO₂·HCl

Color and Shape:

White Crystalline Powder

Molecular weight:

181.11028

Ref: 45-1224960

25mg 1,371.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Dopamine Related Compound C (2-(3,4-Dimethoxyphenyl)ethan-1-amine)

CAS:120-20-7

Amino-naphthols and other amino-phenols, their ethers and esters, other than those cont more than one …

Formula:

C₁₀H₁₅NO₂

Color and Shape:

Yellow Brown Liquid

Molecular weight:

181.11028

Ref: 45-1225237

100mg 1,733.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Polyallylamine Hydrochloride (2-Propen-1-amine, hydrochloride (1:1), homopolymer)

CAS:71550-12-4

Polysulfides, polysulfones & oth products spec in note 3, chapter 39, except elastomeric

Formula:

(C₃H₇N)n·nHCl

Color and Shape:

White Light Yellow Powder

Molecular weight:

93.55 g/mol

Ref: 45-1372333

200mg 1,441.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Phenylephrine Related Compound E (2-[Benzyl(methyl)amino]-1-(3-hydroxyphenyl)ethan-1-one hydrochloride)

CAS:71786-67-9

Aromatic amino-alcohol-phenols, aromatic amino-acid-phenols and other aromatic amino compounds with oxygen function

Formula:

C₁₆H₁₇NO₂·HCl

Color and Shape:

Grey To White Powder

Molecular weight:

291.10261

Ref: 45-1533046

30mg 1,477.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Ecamsule Triethanolamine

CAS:92841-53-7

Halogenated, sulfonated, nitrated or nitrosated derivatives: chlordecone (iso)

Formula:

C₂₈H₃₄O₈S₂·(C₆H₁₅NO₃)₂

Color and Shape:

White Cream Powder

Molecular weight:

562.16951

Ref: 45-1231604

200mg 478.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Iopamidol Related Compound B (5-Glycolamido-N,N'-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-2,4,6-triiodoisophthalamide)

Aromatic cyclic amides (including cyclic carbamates) and their derivatives; salts thereof

Formula:

C₁₆H₂₀I₃N₃O₈

Color and Shape:

White Powder

Molecular weight:

763.06

Ref: 45-1344735

50mg 1,441.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Mirtazapine Related Compound C (2-Methyl-3,4,10,14b-tetrahydrobenzo[c]pyrazino[1,2-a]pyrido[3,2-f]…

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Mirtazapine Related Compound C (2-Methyl-3,4,10,14b-tetrahydrobenzo[c]pyrazino[1,2-a]pyrido[3,2-f]azepin-1(2H)-one)

CAS:191546-96-0

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, …

Formula:

C₁₇H₁₇N₃O

Color and Shape:

White Off-White Crystalline Powder

Molecular weight:

279.13716

Ref: 45-1444241

50mg 1,477.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Risperidone Related Compound G (3-{2-[4-(4-Fluoro-2-hydroxybenzoyl)piperidin-1-yl]ethyl}-2-methyl-…

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Risperidone Related Compound G (3-{2-[4-(4-Fluoro-2-hydroxybenzoyl)piperidin-1-yl]ethyl}-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one hydrochloride)

CAS:152542-00-2

Compounds containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure, …

Formula:

C₂₃H₂₈FN₃O₃

Color and Shape:

Off-White Powder

Molecular weight:

413.21147

Ref: 45-1604756

25mg 1,371.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Desosaminylazithromycin ((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-Ethyl-3,4,10,13-tetrahydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-dimethylamino-β-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one)

CAS:117693-41-1

Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, nesoi

Formula:

C₃₀H₅₈N₂O₉

Color and Shape:

White Off-White Powder

Molecular weight:

590.41423

Ref: 45-1046078

15mg 1,371.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Oxybutynin Related Compound B (Cyclohexyl Mandelic Acid Methyl Ester)

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Oxybutynin Related Compound B (Cyclohexyl Mandelic Acid Methyl Ester)

CAS:10399-13-0

Carboxylic acids w/ alcohol function but w/o other oxygen function and their derivatives, nesoi

Formula:

C₁₅H₂₀O₃

Color and Shape:

White Pale Yellow Powder

Molecular weight:

248.14124

Ref: 45-1485125

20mg 1,371.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Isomalathion (Diethyl 2-{[methoxy(methylthio)phosphoryl]thio}succinate)

CAS:3344-12-5

Organo-sulfur compounds, nesoi

Formula:

C₁₀H₁₉O₆PS₂

Color and Shape:

Colorless Clear Liquid

Molecular weight:

330.03607

Ref: 45-1349604

50mg 1,292.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Nabumetone Related Compound A (1-(6-methoxy-2-naphthyl)-but-1-en-3-one)

CAS:127053-22-9

Ketone-phenols and ketones with other oxygen function

Formula:

C₁₅H₁₄O₂

Color and Shape:

Light Yellow Powder

Molecular weight:

226.09938

Ref: 45-1449530

15mg 1,292.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Azelastine Related Compound F (4-[4-(4-Chlorobenzyl)-1-oxophthalazin-2(1H)-yl]-1-methylazepane 1-oxide)

CAS:640279-88-5

Heterocyclic compounds with nitrogen hetero-atom(s) only, aromatic or modified aromatic, nesoi

Formula:

C₂₂H₂₄ClN₃O₂

Color and Shape:

White Solid

Molecular weight:

397.1557

Ref: 45-1046213

20mg 1,292.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Tiotropium Related Compound H ((2RS,3aSR,5RS,6RS,6aRS)-6-Hydroxy-4,4-dimethylhexahydro-2H-2,5-methanofuro[3,2-b]pyrrol-4-ium bromide)

Heterocyclic compounds with nitrogen hetero-atom(s) only, excluding aromatic or modified aromatic

Formula:

C₉H₁₆BrNO₂

Color and Shape:

White Powder

Molecular weight:

249.03644

Ref: 45-1667632

50mg 2,587.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Artemether Related Compound B ((3R,5aS,6R,8aS,9R,10R,12R,12aR)-Decahydro-10-methoxy-3,6,9-trimethyl-3,12-epoxy-12H-pyrano[4,3-j]-1,2-benzodioxepin)

CAS:71939-51-0

Heterocyclic compounds with oxygen hetero-atom(s) only

Formula:

C₁₆H₂₆O₅

Color and Shape:

White Solid Powder

Molecular weight:

298.17802

Ref: 45-1042805

15mg 1,371.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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4-Hydrazinylbenzenesulfonamide Hydrochloride

CAS:17852-52-7

Sulfonamides, nesoi

Formula:

C₆H₉N₃O₂S·HCl

Color and Shape:

Light Yellow Beige Crystalline Powder

Molecular weight:

223.01823

Ref: 45-1313254

25mg 1,477.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

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Medroxyprogesterone Acetate Related Compound B (17-Hydroxy-6α-methylpregn-4-ene-3,20-dione)

CAS:520-85-4

Estrogens and progestins

Formula:

C₂₂H₃₂O₃

Color and Shape:

White Powder

Molecular weight:

344.23514

Ref: 45-1378023

25mg 1,477.00 €

Estimated delivery in United States, on Friday 28 Feb 2025

+ info