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
Beclomethasone 17-propionate-D5 REF: TR-B131052CAS: 5534-18-9	- - -	426.00 €~2,827.00 €	Tue 04 Feb 25
N-Acetyl Sulfamethoxazole REF: TR-A187885CAS: 21312-10-7	- - -	105.00 €~345.00 €	Tue 04 Feb 25
Isomebumal REF: TR-I821260CAS: 17013-37-5	- - -	285.00 €~1,913.00 €	Tue 04 Feb 25
Alpha,Alpha'-Diethyl-4,4'-stilbenediol-d4 REF: TR-D444962CAS: 6898-97-1	- - -	629.00 €~3,477.00 €	Tue 04 Feb 25
Yunnaconitine REF: TR-Y100900CAS: 70578-24-4	- - -	416.00 €~2,834.00 €	Tue 04 Feb 25
1-Beta-D-Ribofuranosyl-1,2,4-triazole-3-carboxylic Acid Methyl Ester (Ribavirin Impurity H) REF: TR-R415725CAS: 38934-69-9	- - -	296.00 €~1,796.00 €	Tue 04 Feb 25
(-)-alpha-Acetylmethadol Hydrochloride REF: TR-A186325CAS: 43033-72-3	- - -	300.00 €~2,023.00 €	Tue 04 Feb 25
Rifamycin B REF: TR-R508170CAS: 13929-35-6	- - -	291.00 €~2,059.00 €	Tue 04 Feb 25
N-Acetyl Sulfamethazine REF: TR-A187850CAS: 100-90-3	- - -	296.00 €~912.00 €	Tue 04 Feb 25
Diclofenac Ethyl Ester REF: TR-D436495CAS: 15307-77-4	- - -	230.00 €~752.00 €	Tue 04 Feb 25
N-(2,6-Dichlorophenyl)isatin REF: TR-D436885CAS: 24542-74-3	- - -	292.00 €	Tue 04 Feb 25
Diclazuril 6-Carboxylic Acid [(4-Chlorophenyl)cyanomethyl]-2,6-dichlorophenyl-4-amide REF: TR-D436220CAS: 862243-46-7	- - -	285.00 €~1,913.00 €	Tue 04 Feb 25
Des-(1-Azabicyclo) Meropenem REF: TR-M225669CAS: 1053703-36-8	>85%	390.00 €~2,439.00 €	Tue 04 Feb 25
Vitamin D3 REF: TR-V676045CAS: 67-97-0	- - -	108.00 €~153.00 €	Tue 04 Feb 25
Vitexin REF: TR-V757000CAS: 3681-93-4	- - -	119.00 €~266.00 €	Tue 04 Feb 25
Dabigatran Carboxamide Ethyl Ester REF: TR-D100170CAS: 1422435-41-3	- - -	182.00 €~1,444.00 €	Tue 04 Feb 25
Vitamin B1 Monophosphate Chloride REF: TR-V676015CAS: 532-40-1	- - -	260.00 €~491.00 €	Tue 04 Feb 25
(S)-N-[4-[[((S)-2-Amino-6,7,8,9-tetrahydro-8-methyl-4,9-dioxo-4H-pyrazino[1,2-a]-1,3,5-triazin-7-yl) REF: TR-A629750	- - -	356.00 €~2,343.00 €	Tue 04 Feb 25
Didesmethyl Zolmitriptan (90%) REF: TR-D441650CAS: 139264-15-6	90%	409.00 €~1,641.00 €	Tue 04 Feb 25
2-Cyclopentyl-2-hydroxy-2-phenylacetic Acid REF: TR-C989315CAS: 427-49-6	- - -	128.00 €~183.00 €	Tue 04 Feb 25

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Beclomethasone 17-propionate-D5

Controlled Product

CAS:5534-18-9

Stability Hygroscopic Applications Active metabolite of Beclomethasone Dipropionate (BDP). References Soria, I., et al.: Biopharm. …

Formula:

C₂₅H₂₈D₅ClO₆

Color and Shape:

Neat

Molecular weight:

470.01

Ref: TR-B131052

1mg		426.00 €
10mg		2,827.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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N-Acetyl Sulfamethoxazole

CAS:21312-10-7

Impurity Sulfamethoxazole EP Impurity A Applications A metabolite of Sulfamethoxazole. References Ciolino, H., et al.: …

Formula:

C₁₂H₁₃N₃O₄S

Color and Shape:

Off-White

Molecular weight:

295.31

Ref: TR-A187885

10mg		105.00 €
25mg		190.00 €
50mg		345.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Isomebumal

Controlled Product

CAS:17013-37-5

Applications Isomebumal is an impurity of Pentobarbital (P276000), an sedative and hypnotic. References Hoogmartens, J., …

Formula:

C₁₁H₁₈N₂O₃

Color and Shape:

Neat

Molecular weight:

226.27

Ref: TR-I821260

1g		1,913.00 €
100mg		285.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Alpha,Alpha'-Diethyl-4,4'-stilbenediol-d4

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Alpha,Alpha'-Diethyl-4,4'-stilbenediol-d4

Controlled Product

CAS:6898-97-1

Applications α,α'-Diethyl-4,4'-stilbenediol-d4 is an intermediate in the synthesis of d in the synthesis of isotope …

Formula:

C₁₈H₁₆D₄O₂

Color and Shape:

Neat

Molecular weight:

272.37

Ref: TR-D444962

1mg		963.00 €
5mg		3,477.00 €
500µg		629.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Yunnaconitine

Controlled Product

CAS:70578-24-4

Applications Yunnaconitine is a metabolite of Aconitine (A189875), a neurotoxin that binds, activates tetrodotoxin-sensitive Na+ …

Formula:

C₃₅H₄₉NO₁₁

Color and Shape:

Neat

Molecular weight:

659.76

Ref: TR-Y100900

1mg		416.00 €
10mg		2,834.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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1-Beta-D-Ribofuranosyl-1,2,4-triazole-3-carboxylic Acid Methyl Ester (Ribavirin Impurity H)

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1-Beta-D-Ribofuranosyl-1,2,4-triazole-3-carboxylic Acid Methyl Ester (Ribavirin Impurity H)

Controlled Product

CAS:38934-69-9

Formula:

C₉H₁₃N₃O₇

Color and Shape:

Neat

Molecular weight:

275.22

Ref: TR-R415725

10mg		296.00 €
100mg		1,796.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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(-)-alpha-Acetylmethadol Hydrochloride

Controlled Product

CAS:43033-72-3

Applications (-)-α-Acetylmethadol Hydrochloride is a metabolite of methadone which is a potent non-competitive antagonist of …

Formula:

C₂₃H₃₁NO₂·ClH

Color and Shape:

Neat

Molecular weight:

389.96

Ref: TR-A186325

25mg		2,023.00 €
2500µg		300.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Rifamycin B

Controlled Product

CAS:13929-35-6

Impurity Rifaximin EP Impurity B Stability Unstable in solution Applications Rifamycin B (Rifaximin EP Impurity …

Formula:

C₃₉H₄₉NO₁₄

Color and Shape:

Yellow-Orange

Molecular weight:

755.80

Ref: TR-R508170

50mg		291.00 €
500mg		2,059.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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N-Acetyl Sulfamethazine

Controlled Product

CAS:100-90-3

Applications The main metabolite of Sulfamethazine. References Poul, N., et al.: Biochem. J., 136, 1039 …

Formula:

C₁₄H₁₆N₄O₃S

Color and Shape:

Off-White

Molecular weight:

320.37

Ref: TR-A187850

5mg		296.00 €
10mg		369.00 €
25mg		912.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Diclofenac Ethyl Ester

Controlled Product

CAS:15307-77-4

Impurity Aceclofenac EP Impurity C Applications A Diclofenac derivative as anti-inflammatory and analgesic agent. Aceclofenac …

Formula:

C₁₆H₁₅Cl₂NO₂

Color and Shape:

Neat

Molecular weight:

324.20

Ref: TR-D436495

50mg		230.00 €
100mg		329.00 €
250mg		752.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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N-(2,6-Dichlorophenyl)isatin

CAS:24542-74-3

Applications N-(2,6-Dichlorophenyl)isatin can be obtained from 2,6-Dichloroiodobenzene (D434690) which is a reactant in the synthesis …

Formula:

C₁₄H₇Cl₂NO₂

Color and Shape:

Yellow To Dark Orange

Molecular weight:

292.12

Ref: TR-D436885

50mg 292.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Diclazuril 6-Carboxylic Acid [(4-Chlorophenyl)cyanomethyl]-2,6-dichlorophenyl-4-amide

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Diclazuril 6-Carboxylic Acid [(4-Chlorophenyl)cyanomethyl]-2,6-dichlorophenyl-4-amide

CAS:862243-46-7

Applications Diclazuril 6-Carboxylic Acid [(4-Chlorophenyl)cyanomethyl]-2,6-dichlorophenyl-4-amide is an dimerized impurity of Diclazuril (D436200), a nucleotide analog …

Formula:

C₁₈H₉Cl₃N₄O₄

Color and Shape:

Neat

Molecular weight:

451.65

Ref: TR-D436220

25mg		1,913.00 €
2500µg		285.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Des-(1-Azabicyclo) Meropenem

Controlled Product

CAS:1053703-36-8

Applications Des-(1-Azabicyclo) Meropenem is the impurity of Meropenem (M225668), which is an ultra-broad spectrum injectable …

Formula:

C₁₇H₂₇N₃O₆S

Purity:

>85%

Color and Shape:

Neat

Molecular weight:

401.478

Ref: TR-M225669

5mg		390.00 €
10mg		655.00 €
50mg		2,439.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Vitamin D3

CAS:67-97-0

Stability Temperature Sensitive Applications Vitamin D3 is the vitamin that mediates intestinal calcium absorbtion, bone …

Formula:

C₂₇H₄₄O

Color and Shape:

White

Molecular weight:

384.64

Ref: TR-V676045

1g		126.00 €
5g		153.00 €
50mg		108.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Vitexin

Controlled Product

CAS:3681-93-4

Stability Hygroscopic Applications Vitexin is a phenolic glycoside drug that shows anti-stress activity. It also …

Formula:

C₂₁H₂₀O₁₀

Color and Shape:

Yellow

Molecular weight:

432.38

Ref: TR-V757000

5mg		119.00 €
10mg		135.00 €
25mg		266.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Dabigatran Carboxamide Ethyl Ester

CAS:1422435-41-3

Applications Dabigatran Carboxamide Ethyl Ester is an impurity of Dabigatran Etexilate Mesylate (D100150) which is …

Formula:

C₂₇H₂₈N₆O₄

Color and Shape:

Off-White

Molecular weight:

500.55

Ref: TR-D100170

5mg		182.00 €
25mg		798.00 €
50mg		1,444.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Vitamin B1 Monophosphate Chloride

CAS:532-40-1

Applications Vitamin B1 Monophosphate Chloride is a precursor of thiamine pyrophosphate (T344070), a thiamine (T344185) …

Formula:

C₁₂H₁₈N₄O₄PS·Cl

Color and Shape:

White

Molecular weight:

380.79

Ref: TR-V676015

1g		260.00 €
5g		491.00 €
2500mg		346.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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(S)-N-[4-[[((S)-2-Amino-6,7,8,9-tetrahydro-8-methyl-4,9-dioxo-4H-pyrazino[1,2-a]-1,3,5-triazin-7-y…

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(S)-N-[4-[[((S)-2-Amino-6,7,8,9-tetrahydro-8-methyl-4,9-dioxo-4H-pyrazino[1,2-a]-1,3,5-triazin-7-yl)

Applications An impurity of Levomefolate (L375720), the natural form of folic acid. References Verlinde, P.H.C.., …

Formula:

C₂₀H₂₃N₇O₇

Color and Shape:

Neat

Molecular weight:

473.44

Ref: TR-A629750

1mg		356.00 €
10mg		2,343.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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Didesmethyl Zolmitriptan (90%)

Controlled Product

CAS:139264-15-6

Applications A metabolite of Zolmitriptan (Z639000). References Buckingham, J., et al.: J. Med. Chem., 38, …

Formula:

C₁₄H₁₇N₃O₂

Purity:

90%

Color and Shape:

Neat

Molecular weight:

259.30

Ref: TR-D441650

5mg		409.00 €
10mg		710.00 €
25mg		1,641.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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2-Cyclopentyl-2-hydroxy-2-phenylacetic Acid

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2-Cyclopentyl-2-hydroxy-2-phenylacetic Acid

CAS:427-49-6

Applications 2-Cyclopentyl-2-hydroxy-2-phenylacetic Acid is an impurity of Glycopyrrolate (G657000), a novel pharmaceutical compound based on …

Formula:

C₁₃H₁₆O₃

Color and Shape:

Off White To Light Brown

Molecular weight:

220.26

Ref: TR-C989315

1g		128.00 €
5g		183.00 €

Estimated delivery in United States, on Tuesday 4 Feb 2025

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