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
Androsterone REF: TR-A637535CAS: 53-41-8	- - -	97.00 €~305.00 €	Tue 29 Oct 24
21-Chloro-17a-[(2-furanylcarbonxyl)oxy]-9b,11b-oxido-16a-methylpregna-1,4-diene-3,20-dioneMometasone Furoate Impurity D REF: TR-C366525CAS: 83881-09-8	- - -	222.00 €~2,923.00 €	Tue 29 Oct 24
rac-4-Hydroxy Propranolol Hydrochloride REF: TR-H952545CAS: 14133-90-5	- - -	296.00 €~1,954.00 €	Tue 29 Oct 24
3'-Azido-3'-deoxythymidine 5’-Monophosphate Sodium Salt REF: TR-A825070CAS: 128506-29-6	- - -	259.00 €~1,728.00 €	Tue 29 Oct 24
rac N,O-Didesmethyl Venlafaxine REF: TR-D441575CAS: 135308-74-6	- - -	308.00 €~2,024.00 €	Tue 29 Oct 24
8(9)-Methoxy-1,3-dimethyl-12-thioxopyrido[1’,2’:3,4]imidazo[1,2-a]benzimidazol-2-(12H)-one (Mixture of Regioisomers) REF: TR-M262560CAS: 125656-82-8 125656-83-9	- - -	366.00 €~1,742.00 €	Tue 29 Oct 24
Bis-(6a-Methylprednisolone) 21,21’-Ether REF: TR-B496020	- - -	325.00 €~2,178.00 €	Tue 29 Oct 24
6'-Methoxy-2'-acetonaphthone (Naproxen Impurity L) REF: TR-M260805CAS: 3900-45-6	- - -	216.00 €~479.00 €	Tue 29 Oct 24
Ganciclovir Mono-O-propionate REF: TR-G235020CAS: 194159-18-7	- - -	320.00 €~2,074.00 €	Tue 29 Oct 24
(R,S)-Palonosetron Hydrochloride (90%) REF: TR-P165795CAS: 135755-51-0	90%	1,203.00 €~3,168.00 €	Tue 29 Oct 24
8-(4-Chlorobutyl)-8-azaspiro[4.5]decane-7,9-dione REF: TR-C365020CAS: 21098-11-3	- - -	308.00 €~1,981.00 €	Tue 29 Oct 24
N-Acetyl Sulfamethoxazole REF: TR-A187885CAS: 21312-10-7	- - -	95.00 €~315.00 €	Tue 29 Oct 24
Brodimoprim REF: TR-B678100CAS: 56518-41-3	- - -	170.00 €~320.00 €	Tue 29 Oct 24
N-Formyl-L-leucine (3S,4R,6S)-3-Hexyltetrahydro-2-oxo-6-undecyl-2H-pyran-4-yl Ester REF: TR-F700570CAS: 130793-27-0	- - -	345.00 €~2,344.00 €	Tue 29 Oct 24
N-Formyl Norfloxacin REF: TR-F701015CAS: 70459-04-0	- - -	92.00 €~246.00 €	Tue 29 Oct 24
Hydroxy Metronidazole-d4 REF: TR-H948397CAS: 1215071-08-1	- - -	310.00 €~2,033.00 €	Tue 29 Oct 24
3,4-Epoxy-moxidectin REF: TR-E589045CAS: 1402163-94-3	- - -	689.00 €~2,141.00 €	Tue 29 Oct 24
(E)-Olopatadine Hydrochloride REF: TR-O575005CAS: 949141-22-4	- - -	372.00 €~2,501.00 €	Tue 29 Oct 24
Amoxycilloic Acid Sodium Salt REF: TR-A634325CAS: 42947-63-7	- - -	325.00 €~2,136.00 €	Tue 29 Oct 24
Ofloxacin N-Oxide Acetic Acid Salt (Mixture of Diastereomers) REF: TR-O245755CAS: 2731368-77-5	- - -	268.00 €~1,779.00 €	Tue 29 Oct 24

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Androsterone

Controlled Product

CAS:53-41-8

Applications A steroid hormone with weak androgenic activity. It is metabolized from Testosterone (T155000) in …

Formula:

C₁₉H₃₀O₂

Color and Shape:

White

Molecular weight:

290.44

Ref: TR-A637535

1g		305.00 €
100mg		97.00 €
250mg		118.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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21-Chloro-17a-[(2-furanylcarbonxyl)oxy]-9b,11b-oxido-16a-methylpregna-1,4-diene-3,20-dioneMometaso…

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21-Chloro-17a-[(2-furanylcarbonxyl)oxy]-9b,11b-oxido-16a-methylpregna-1,4-diene-3,20-dioneMometasone Furoate Impurity D

CAS:83881-09-8

Impurity Mometasone Furoate EP Impurity D Applications A21-Chloro-17α-[(2-furanylcarbonxyl)oxy]-9β,11β-oxido-16α-methylpregna-1,4-diene-3,20-dione (Mometasone EP Impurity D) is a impurity …

Formula:

C₂₇H₂₉ClO₆

Color and Shape:

White To Off-White

Molecular weight:

484.97

Ref: TR-C366525

10mg		413.00 €
100mg		2,923.00 €
2500µg		222.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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rac-4-Hydroxy Propranolol Hydrochloride

CAS:14133-90-5

Stability Hygroscopic Applications rac-4-Hydroxy Propranolol Hydrochloride is a metabolite of Propranolol. References Walle, T., et …

Formula:

C₁₆H₂₁NO₃·ClH

Color and Shape:

Neat

Molecular weight:

311.80

Ref: TR-H952545

5mg		296.00 €
50mg		1,954.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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3'-Azido-3'-deoxythymidine 5’-Monophosphate Sodium Salt

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3'-Azido-3'-deoxythymidine 5’-Monophosphate Sodium Salt

Controlled Product

CAS:128506-29-6

Applications A metabolite of the potent and selective inhibitor of HIV-1 replication, AZT. References Brehm, …

Formula:

C₁₀H₁₃N₅O₇P·Na

Color and Shape:

Neat

Molecular weight:

369.20

Ref: TR-A825070

10mg		259.00 €
100mg		1,728.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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rac N,O-Didesmethyl Venlafaxine

Controlled Product

CAS:135308-74-6

Applications A metabolite of Venlafaxine, a selective serotonin noradrenaline reuptake inhibitor. References Klamerus, K., et …

Formula:

C₁₅H₂₃NO₂

Color and Shape:

Off White Powder

Molecular weight:

249.35

Ref: TR-D441575

5mg		308.00 €
10mg		558.00 €
50mg		2,024.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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8(9)-Methoxy-1,3-dimethyl-12-thioxopyrido[1’,2’:3,4]imidazo[1,2-a]benzimidazol-2-(12H)-one (Mixtur…

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8(9)-Methoxy-1,3-dimethyl-12-thioxopyrido[1’,2’:3,4]imidazo[1,2-a]benzimidazol-2-(12H)-one (Mixture of Regioisomers)

Controlled Product

CAS:125656-82-8 125656-83-9

Impurity Omeprazole EP Impurity F+Omeprazole EP Impurity G Stability Sample unstable under MS condition Applications …

Formula:

C₁₆H₁₃N₃O₂S

Color and Shape:

Neat

Molecular weight:

311.36

Ref: TR-M262560

5mg		574.00 €
25mg		1,742.00 €
2500µg		366.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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Bis-(6a-Methylprednisolone) 21,21’-Ether

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Bis-(6a-Methylprednisolone) 21,21’-Ether

Controlled Product

Formula:

C₄₄H₅₈O₉

Color and Shape:

Neat

Molecular weight:

730.94

Ref: TR-B496020

1mg		591.00 €
5mg		2,178.00 €
500µg		325.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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6'-Methoxy-2'-acetonaphthone (Naproxen Impurity L)

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6'-Methoxy-2'-acetonaphthone (Naproxen Impurity L)

Controlled Product

CAS:3900-45-6

Impurity Naproxen USP Related Compound L Applications Naproxen impurity L. Naproxen USP Related Compound L …

Formula:

C₁₃H₁₂O₂

Color and Shape:

Beige

Molecular weight:

200.233

Ref: TR-M260805

1g		339.00 €
10g		479.00 €
100mg		216.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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Ganciclovir Mono-O-propionate

CAS:194159-18-7

Impurity Valganociclovir EP Impurity J Applications Ganciclovir Mono-O-propionate is a potential prodrug of Ganciclovir (G235000). …

Formula:

C₁₂H₁₇N₅O₅

Color and Shape:

Neat

Molecular weight:

311.29

Ref: TR-G235020

50mg		320.00 €
500mg		2,074.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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(R,S)-Palonosetron Hydrochloride (90%)

Controlled Product

CAS:135755-51-0

Stability Hygroscopic Applications The (R,S)-enantiomer of Palonosetron (P165800), a potent and selective antagonist, with 5-HT3 …

Formula:

C₁₉H₂₄N₂O·ClH

Purity:

90%

Color and Shape:

Neat

Molecular weight:

332.87

Ref: TR-P165795

5mg		1,203.00 €
10mg		1,895.00 €
25mg		3,168.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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8-(4-Chlorobutyl)-8-azaspiro[4.5]decane-7,9-dione

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8-(4-Chlorobutyl)-8-azaspiro[4.5]decane-7,9-dione

CAS:21098-11-3

Impurity Buspirone EP Impurity L Applications 8-(4-Chlorobutyl)-8-azaspiro[4.5]decane-7,9-dione (Buspirone EP Impurity L) is an impurity of …

Formula:

C₁₃H₂₀ClNO₂

Color and Shape:

Colourless

Molecular weight:

257.76

Ref: TR-C365020

1g		1,981.00 €
100mg		308.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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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		95.00 €
25mg		177.00 €
50mg		315.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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Brodimoprim

Controlled Product

CAS:56518-41-3

Applications A structural derivative of Trimethoprim (T795615). A selective dihydrofolate reductase inhibitor; diaminopyridine antibacterial agent. …

Formula:

C₁₃H₁₅BrN₄O₂

Color and Shape:

Neat

Molecular weight:

339.19

Ref: TR-B678100

5mg		170.00 €
10mg		215.00 €
25mg		320.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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N-Formyl-L-leucine (3S,4R,6S)-3-Hexyltetrahydro-2-oxo-6-undecyl-2H-pyran-4-yl Ester

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N-Formyl-L-leucine (3S,4R,6S)-3-Hexyltetrahydro-2-oxo-6-undecyl-2H-pyran-4-yl Ester

CAS:130793-27-0

Impurity Orlistat USP Related Compound D Applications N-Formyl-L-leucine (3S,4R,6S)-3-Hexyltetrahydro-2-oxo-6-undecyl-2H-pyran-4-yl ester is an impurity of Orlistat …

Formula:

C₂₉H₅₃NO₅

Color and Shape:

Colourless

Molecular weight:

495.73

Ref: TR-F700570

25mg		2,344.00 €
2500µg		345.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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N-Formyl Norfloxacin

CAS:70459-04-0

Formula:

C₁₇H₁₈FN₃O₄

Color and Shape:

Off White Solid

Molecular weight:

347.34

Ref: TR-F701015

10mg		92.00 €
25mg		170.00 €
50mg		246.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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Hydroxy Metronidazole-d4

Controlled Product

CAS:1215071-08-1

Applications A labelled metabolite of Metronidazole (M338880). References Haller, I., et al.: Antimicrob. Agents Chemother., …

Formula:

C₆H₄H₅N₃O₄

Color and Shape:

Off-White

Molecular weight:

191.18

Ref: TR-H948397

1mg		310.00 €
10mg		2,033.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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3,4-Epoxy-moxidectin

Controlled Product

CAS:1402163-94-3

Formula:

C₃₇H₅₃NO₉

Color and Shape:

Neat

Molecular weight:

655.82

Ref: TR-E589045

5mg		1,210.00 €
10mg		2,141.00 €
2500µg		689.00 €

Estimated delivery in United States, on Tuesday 29 Oct 2024

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(E)-Olopatadine Hydrochloride

Controlled Product

CAS:949141-22-4

Impurity Olopatadine (E)-Isomer Stability Very Hygroscopic Applications (E)-Olopatadine Hydrochloride is a trans-isomeric impurity of antihistaminic …

Formula:

C₂₁H₂₃NO₃·ClH

Color and Shape:

Neat

Molecular weight:

373.87