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
Citalopram Related Compound H (1-(4'-fluorophenyl)-1-(3-dimethylaminopropyl)-5-bromophthalane hydrobromide) REF: 45-1134222CAS: 479065-02-6	- - -	1,371.00 €	Tue 15 Oct 24
Cetirizine Related Compound C (2-(2-{4-[(4-Chlorophenyl)phenylmethyl]piperazin-1-yl}ethoxy)acetamide) REF: 45-1102952CAS: 83881-37-2	- - -	1,477.00 €	Tue 15 Oct 24
Norfloxacin Related Compound H (7-[4-(ethoxycarbonyl)piperazin-1-yl]-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid) REF: 45-1471583CAS: 105440-01-5	- - -	1,477.00 €	Tue 15 Oct 24
Ethosuximide Related Compound A (2-Ethyl-2-methylsuccinic acid) REF: 45-1264013CAS: 631-31-2	- - -	1,116.00 €	Tue 15 Oct 24
(Z)-N'-Methylmeloxicam ((Z)-N-(3,5-dimethylthiazol-2(3H)-ylidene)-4-hydroxy-2-methyl-2H-benzo[e][1,2]thiazine-3-carboxamide 1,1-dioxide) REF: 45-1379456CAS: 1145656-36-5	- - -	1,371.00 €	Tue 15 Oct 24
Desloratadine Related Compound B (8-chloro-11-(1,2,3,6-tetrahydropyridin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine hydrochloride) REF: 45-1173086	- - -	1,552.00 €	Tue 15 Oct 24
Proguanil Related Compound C (1,5-bis(4-chlorophenyl)biguanide hydrochloride) REF: 45-1568051CAS: 13590-98-2	- - -	775.00 €	Tue 15 Oct 24
Pyrantel Related Compound A ((Z)-1-Methyl-2-[2-(2-thiophenyl)vinyl]-1,4,5,6-Tetrahydropyrimidine 4,4'-methylenebis[3-hydroxy-2-naphthoate] (1:1)) REF: 45-1584014	- - -	1,477.00 €	Tue 15 Oct 24
Cefuroxime Axetil δ-3-Isomers ((1RS,6R,7R)-1-Acetoxyethyl 3-[(carbamoyloxy)methyl]-7-[(Z)-2-(furan-2-yl)-2-(methoxyimino)acetamido]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylate) REF: 45-1098231CAS: 123458-61-7	- - -	1,371.00 €	Tue 15 Oct 24
Sumatriptan Succinate Related Compound C ([3-[2-(dimethylamino)ethyl]-1-(hydroxymethyl)-1H-indol-5-yl]-N-methylmethanesulfonamide succinate salt) REF: 45-1642223	- - -	1,814.00 €	Tue 15 Oct 24
Timolol Related Compound F (3-Chloro-4-morpholino-1,2,5-thiadiazol) REF: 45-1667348CAS: 30165-96-9	- - -	1,477.00 €	Tue 15 Oct 24
Metoclopramide Related Compound B (Methyl 4-acetamido-5-chloro-2-methoxybenzoate) REF: 45-1440820CAS: 4093-31-6	- - -	1,371.00 €	Tue 15 Oct 24
Atenolol Related Compound E (2,2'-{[(2-Hydroxypropane-1,3-diyl)bis(oxy)]bis(4,1-phenylene)}diacetamide) REF: 45-1044298CAS: 141650-31-9	- - -	1,282.00 €	Tue 15 Oct 24
Cyclophosphamide Related Compound B (3-(2-chloroethyl)-2-oxo-2-hydroxy-1,3,6,2-oxadiazaphosphonane) REF: 45-1157024CAS: 158401-52-6	- - -	1,477.00 €	Tue 15 Oct 24
Lamotrigine Related Compound C (3-amino-6-(2,3-dichlorophenyl)-1,2,4-triazin-5(4H)-one) REF: 45-1356789CAS: 252186-78-0	- - -	1,477.00 €	Tue 15 Oct 24
Bisoprolol Related Compound D (1-(4-{[(2-Isopropoxyethoxy)methoxy]methyl}phenoxy)-3-(isopropylamino)propan-2-ol fumarate (2:1) salt) REF: 45-1075799	- - -	1,575.00 €	Tue 15 Oct 24
Haloperidol Related Compound A (4,4'-Bis[4-(p-chlorophenyl)-4-hydroxypiperidino]-butyrophenone) REF: 45-1303013CAS: 67987-08-0	- - -	1,477.00 €	Tue 15 Oct 24
Valsartan Related Compound B (N-butyryl-N-{[2'-(1H-tetrazole-5-yl)-biphenyl-4-yl]methyl}-L-valine) REF: 45-1708784CAS: 952652-79-8	- - -	1,858.00 €	Tue 15 Oct 24
Desloratadine Related Compound F (8-Chloro-6,11-dihydro-11-(N-formyl-4-piperidinylidene) -5H-benzo[5,6]cyclohepta[1,2-b]pyridine) REF: 45-1173064CAS: 117810-61-4	- - -	1,477.00 €	Tue 15 Oct 24
Cilostazol Related Compound A (6-hydroxy-3,4-dihydro-1H-quinolin-2-one) REF: 45-1134164CAS: 54197-66-9	- - -	1,371.00 €	Tue 15 Oct 24

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Citalopram Related Compound H (1-(4'-fluorophenyl)-1-(3-dimethylaminopropyl)-5-bromophthalane hydrobromide)

CAS:479065-02-6

Aromatic pesticides with oxygen hetero-atom(s) only ne

Formula:

C₁₉H₂₁BrFNO·HBr

Color and Shape:

Off-White Powder

Molecular weight:

377.07906

Ref: 45-1134222

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Cetirizine Related Compound C (2-(2-{4-[(4-Chlorophenyl)phenylmethyl]piperazin-1-yl}ethoxy)acetamide)

CAS:83881-37-2

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

Formula:

C₂₁H₂₆ClN₃O₂

Color and Shape:

Powder

Molecular weight:

387.17135

Ref: 45-1102952

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Norfloxacin Related Compound H (7-[4-(ethoxycarbonyl)piperazin-1-yl]-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid)

CAS:105440-01-5

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

Formula:

C₁₉H₂₂FN₃O₅

Color and Shape:

Off-White Powder

Molecular weight:

391.15435

Ref: 45-1471583

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Ethosuximide Related Compound A (2-Ethyl-2-methylsuccinic acid)

CAS:631-31-2

Acyclic polycarboxylic acids and their anhydrides, halides, peroxides and their derivatives, nesoi

Formula:

C₇H₁₂O₄

Color and Shape:

White Powder

Molecular weight:

160.07356

Ref: 45-1264013

Estimated delivery in United States, on Tuesday 15 Oct 2024

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(Z)-N'-Methylmeloxicam ((Z)-N-(3,5-dimethylthiazol-2(3H)-ylidene)-4-hydroxy-2-methyl-2H-benzo[e][1,2]thiazine-3-carboxamide 1,1-dioxide)

CAS:1145656-36-5

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

Formula:

C₁₅H₁₅N₃O₄S₂

Color and Shape:

Powder

Molecular weight:

365.0504

Ref: 45-1379456

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Desloratadine Related Compound B (8-chloro-11-(1,2,3,6-tetrahydropyridin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine hydrochloride)

Compounds containing an unfused pyridine ring in the structure, nesoi

Formula:

C₁₉H₂₀Cl₂N₂

Color and Shape:

Off-White Solid

Molecular weight:

346.10035

Ref: 45-1173086

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Proguanil Related Compound C (1,5-bis(4-chlorophenyl)biguanide hydrochloride)

CAS:13590-98-2

Aromatic imines and their derivatives, salts thereof

Formula:

C₁₄H₁₃Cl₂N₅·HCl

Color and Shape:

White Crystalline Powder

Molecular weight:

321.0548

Ref: 45-1568051

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Pyrantel Related Compound A ((Z)-1-Methyl-2-[2-(2-thiophenyl)vinyl]-1,4,5,6-Tetrahydropyrimidine 4,4'-methylenebis[3-hydroxy-2-naphthoate] (1:1))

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

Formula:

C₁₁H₁₄N₂S·C₂₃H₁₆O₆

Color and Shape:

Yellow Solid

Molecular weight:

206.08777

Ref: 45-1584014

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Cefuroxime Axetil δ-3-Isomers ((1RS,6R,7R)-1-Acetoxyethyl 3-[(carbamoyloxy)methyl]-7-[(Z)-2-(furan-2-yl)-2-(methoxyimino)acetamido]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylate)

CAS:123458-61-7

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

Formula:

C₂₀H₂₂N₄O₁₀S

Color and Shape:

Tan Powder

Molecular weight:

510.10566

Ref: 45-1098231

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Sumatriptan Succinate Related Compound C ([3-[2-(dimethylamino)ethyl]-1-(hydroxymethyl)-1H-indol-5-yl]-N-methylmethanesulfonamide succinate salt)

Sulfonamides, nesoi

Formula:

C₁₅H₂₃N₃O₃S(C₄H₆O₄)

Color and Shape:

Off-White Powder

Molecular weight:

384.47

Ref: 45-1642223

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Timolol Related Compound F (3-Chloro-4-morpholino-1,2,5-thiadiazol)

CAS:30165-96-9

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

Formula:

C₆H₈ClN₃OS

Color and Shape:

Off-White Powder

Molecular weight:

205.00766

Ref: 45-1667348

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Metoclopramide Related Compound B (Methyl 4-acetamido-5-chloro-2-methoxybenzoate)

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Metoclopramide Related Compound B (Methyl 4-acetamido-5-chloro-2-methoxybenzoate)

CAS:4093-31-6

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

Formula:

C₁₁H₁₂ClNO₄

Color and Shape:

White Off-White Powder

Molecular weight:

257.04549

Ref: 45-1440820

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Atenolol Related Compound E (2,2'-{[(2-Hydroxypropane-1,3-diyl)bis(oxy)]bis(4,1-phenylene)}diacetamide)

CAS:141650-31-9

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

Formula:

C₁₉H₂₂N₂O₅

Color and Shape:

White Solid

Molecular weight:

358.15287

Ref: 45-1044298

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Cyclophosphamide Related Compound B (3-(2-chloroethyl)-2-oxo-2-hydroxy-1,3,6,2-oxadiazaphosphonane)

CAS:158401-52-6

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

Formula:

C₇H₁₆N₂O₃ClP

Color and Shape:

White Yellow Powder

Molecular weight:

242.05871

Ref: 45-1157024

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Lamotrigine Related Compound C (3-amino-6-(2,3-dichlorophenyl)-1,2,4-triazin-5(4H)-one)

CAS:252186-78-0

Compounds (excluding melamine) containing an unfused triazine ring (whether or not hydrogenated) in the structure

Formula:

C₉H₆Cl₂N₄O

Color and Shape:

White Off-White Powder

Molecular weight:

255.99187

Ref: 45-1356789

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Bisoprolol Related Compound D (1-(4-{[(2-Isopropoxyethoxy)methoxy]methyl}phenoxy)-3-(isopropylamino)propan-2-ol fumarate (2:1) salt)

Amino-alcohols, other than those containing more than one kind of oxygen function, their ethers and …

Formula:

C₁₉H₃₃NO₅)₂·C₄H₄O₄

Color and Shape:

White Solid

Molecular weight:

827.02

Ref: 45-1075799

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Haloperidol Related Compound A (4,4'-Bis[4-(p-chlorophenyl)-4-hydroxypiperidino]-butyrophenone)

CAS:67987-08-0

Compounds containing an unfused pyridine ring in the structure, nesoi

Formula:

C₃₂H₃₆Cl₂N₂O₃

Color and Shape:

White Powder

Molecular weight:

566.2103

Ref: 45-1303013

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Valsartan Related Compound B (N-butyryl-N-{[2'-(1H-tetrazole-5-yl)-biphenyl-4-yl]methyl}-L-valine)

CAS:952652-79-8

Aromatic or modified aromatic drugs with nitrogen heter

Formula:

C₂₃H₂₇N₅O₃

Color and Shape:

White Powder

Molecular weight:

421.21139

Ref: 45-1708784

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Desloratadine Related Compound F (8-Chloro-6,11-dihydro-11-(N-formyl-4-piperidinylidene) -5H-benzo[5,6]cyclohepta[1,2-b]pyridine)

CAS:117810-61-4

Compounds containing an unfused pyridine ring in the structure, nesoi

Formula:

C₂₀H₁₉ClN₂O

Color and Shape:

White Solid

Molecular weight:

338.11859

Ref: 45-1173064

Estimated delivery in United States, on Tuesday 15 Oct 2024

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Cilostazol Related Compound A (6-hydroxy-3,4-dihydro-1H-quinolin-2-one)

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Cilostazol Related Compound A (6-hydroxy-3,4-dihydro-1H-quinolin-2-one)

CAS:54197-66-9

Lactams not elsewhere specified or included

Formula:

C₉H₉NO₂

Color and Shape:

Yellow White Powder

Molecular weight:

163.06333

Ref: 45-1134164

Estimated delivery in United States, on Tuesday 15 Oct 2024

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