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
(E)-Ethyl 4-(8-chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)-3,4-dihydropyridine-1(2H)-carboxylate REF: TR-E902770	- - -	259.00 €~1,749.00 €	Mon 28 Oct 24
Methyl Diethyldithiocarbamate REF: TR-M301700CAS: 686-07-7	- - -	154.00 €~315.00 €	Mon 28 Oct 24
N-(Ethylamino) Fluvoxamine (up to 15% Z isomer) REF: TR-E898280CAS: 1217262-11-7	- - -	263.00 €~1,809.00 €	Mon 28 Oct 24
(S)-Pregabalin-13C3 REF: TR-P704793CAS: 148553-50-8	- - -	428.00 €~2,894.00 €	Mon 28 Oct 24
Dioxindolyl-L-alanine (Mixture of Diastereomers) REF: TR-D486855CAS: 184955-21-3	- - -	350.00 €~2,327.00 €	Mon 28 Oct 24
4-Acetyl Rhein REF: TR-A187700CAS: 875535-36-7	- - -	457.00 €~1,557.00 €	Mon 28 Oct 24
Defluoro Dolutegravir (>85%) REF: TR-D228715CAS: 1863916-88-4	>85%	236.00 €~1,609.00 €	Mon 28 Oct 24
4'-O-2,6-Dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl Selamectin REF: TR-D440100CAS: 301849-46-7	- - -	259.00 €~1,749.00 €	Mon 28 Oct 24
Etonogestrel-d7 (Major) REF: TR-E933627CAS: 54048-10-1	- - -	324.00 €~2,136.00 €	Mon 28 Oct 24
Methotrexate Hexaglutamate Trifluoroacetate REF: TR-M260745CAS: 80801-53-2	- - -	200.00 €~3,993.00 €	Mon 28 Oct 24
2,2'-Bisnalmefene (>85%) REF: TR-B504000CAS: 176220-84-1	>85%	1,824.00 €	Mon 28 Oct 24
Erythromycin A Oxime REF: TR-E650010CAS: 13127-18-9	- - -	87.00 €~332.00 €	Mon 28 Oct 24
Estrone REF: TR-E889050CAS: 53-16-7	- - -	98.00 €~220.00 €	Mon 28 Oct 24
5-Acetyl Rhein REF: TR-A187705CAS: 875535-35-6	- - -	179.00 €~1,140.00 €	Mon 28 Oct 24
Anhydro Chlortetracycline Hydrochloride REF: TR-A637740CAS: 65490-24-6	- - -	320.00 €~2,119.00 €	Mon 28 Oct 24
Eltrombopag Methyl Ester REF: TR-E508005CAS: 1246929-01-0	- - -	315.00 €~2,114.00 €	Mon 28 Oct 24
Albendazole Impurity G REF: TR-M288735CAS: 20367-38-8	- - -	252.00 €~1,162.00 €	Mon 28 Oct 24
17-Oxo Dexamethasone REF: TR-O855200CAS: 1880-61-1	- - -	313.00 €~906.00 €	Mon 28 Oct 24
O-Methyl Atovaquone REF: TR-M288300CAS: 129700-41-0	- - -	263.00 €~1,749.00 €	Mon 28 Oct 24
4-Aminodeoxopteroic Acid REF: TR-A603895CAS: 36093-85-3	- - -	268.00 €~1,760.00 €	Mon 28 Oct 24

(E)-Ethyl 4-(8-chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)-3,4-dihydropyridine-1(…

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(E)-Ethyl 4-(8-chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)-3,4-dihydropyridine-1(2H)-carboxylate

Controlled Product

Applications (E)-ethyl 4-(8-chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)-3,4-dihydropyridine-1(2H)-carboxylate is an impurity of loratadine (L469575), which is a nonsedating-type histamine H1-receptor. …

Formula:

C₂₂H₂₁ClN₂O₂

Color and Shape:

Neat

Molecular weight:

380.87

Ref: TR-E902770

1mg		259.00 €
10mg		1,749.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Methyl Diethyldithiocarbamate

Controlled Product

CAS:686-07-7

Applications A metabolite of a mixed disulfide S-(N,N-diethyldithiocarbamoyl)-N-acetyl-L-cysteine (AC-DDTC), an antimutagenic mixed disulfide from disulfiram. …

Formula:

C₆H₁₃NS₂

Color and Shape:

Neat

Molecular weight:

163.30

Ref: TR-M301700

50mg		154.00 €
100mg		206.00 €
250mg		315.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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N-(Ethylamino) Fluvoxamine (up to 15% Z isomer)

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N-(Ethylamino) Fluvoxamine (up to 15% Z isomer)

CAS:1217262-11-7

Applications Fluvoxamine impurity.

Formula:

C₁₇H₂₆F₃N₃O₂

Color and Shape:

Colourless Oily

Molecular weight:

361.40

Ref: TR-E898280

1mg		263.00 €
10mg		1,809.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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(S)-Pregabalin-13C3

Controlled Product

CAS:148553-50-8

Applications (S)-Pregabalin-13C3, is the labeled analogue of (S)-Pregabalin (P704790), a S-Enantiomer of Pregabalin. A GABA …

Formula:

C₅₁₃C₃H₁₇NO₂

Color and Shape:

Off-White

Molecular weight:

162.2

Ref: TR-P704793

5mg		2,894.00 €
500µg		428.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Dioxindolyl-L-alanine (Mixture of Diastereomers)

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Dioxindolyl-L-alanine (Mixture of Diastereomers)

Controlled Product

CAS:184955-21-3

Applications Dioxindolyl-L-alanine is used in the synthesis of peptides containing 5-Hydroxytryptophan, Oxindolylalanine, N-Formylkynurenine and Kynurenine. …

Formula:

C₁₁H₁₂N₂O₄

Color and Shape:

Neat

Molecular weight:

236.22

Ref: TR-D486855

50mg		350.00 €
500mg		2,327.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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4-Acetyl Rhein

Controlled Product

CAS:875535-36-7

Applications An impurity in the Diacerein (D303000) bulk drug. References Pelletier, J., et al.: Arthritis …

Formula:

C₁₇H₁₀O₇

Color and Shape:

Neat

Molecular weight:

326.26

Ref: TR-A187700

5mg		457.00 €
10mg		832.00 €
25mg		1,557.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Defluoro Dolutegravir (>85%)

CAS:1863916-88-4

Applications Defluoro Dolutegravir is an impurity of Dolutegravir (D528800), a second generation HIV-1 integrase strand …

Formula:

C₂₀H₂₀FN₃O₅

Purity:

>85%

Color and Shape:

Off-White To Light Brown

Molecular weight:

401.39

Ref: TR-D228715

1mg		236.00 €
10mg		1,609.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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4'-O-2,6-Dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl Selamectin

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4'-O-2,6-Dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl Selamectin

Controlled Product

CAS:301849-46-7

Applications 4'-O-2,6-Dideoxy-3-O-methyl-α-L-arabino-hexopyranosyl Selamectin is an impurity of Selamectin (S247990) which is a topical parasiticide. Selamectin …

Formula:

C₅₀H₇₅NO₁₄

Color and Shape:

Neat

Molecular weight:

914.13

Ref: TR-D440100

5mg		259.00 €
50mg		1,749.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Etonogestrel-d7 (Major)

Controlled Product

CAS:54048-10-1

Applications A biologically active labelled metabolite of Desogestrel. References Croxatto, H.B., et al.: Hum. Reprod., …

Formula:

C₂₂H₂₁D₇O₂

Color and Shape:

Neat

Molecular weight:

331.5

Ref: TR-E933627

1mg		324.00 €
10mg		2,136.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Methotrexate Hexaglutamate Trifluoroacetate

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Methotrexate Hexaglutamate Trifluoroacetate

CAS:80801-53-2

Stability Hygroscopic Applications Methotrexate Hexaglutamate is a metabolite of Methotrexate (M260675); a folic acid antagonist, …

Formula:

C₄₅H₅₇N₁₃O₂₀·x(C₂HF₃O₂)

Color and Shape:

Yellow Solid

Molecular weight:

1214.03

Ref: TR-M260745

5mg		1,415.00 €
25mg		3,993.00 €
500µg		200.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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2,2'-Bisnalmefene (>85%)

Controlled Product

CAS:176220-84-1

Formula:

C₄₂H₄₈N₂O₆

Purity:

>85%

Color and Shape:

Neat

Molecular weight:

676.84

Ref: TR-B504000

10mg 1,824.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Erythromycin A Oxime

CAS:13127-18-9

Impurity Clarithromycin EP Impurity J Applications Erythromycin A Oxime (Roxithromycin Impurity C) (Clarithromycin EP Impurity …

Formula:

C₃₇H₆₈N₂O₁₃

Color and Shape:

Off White

Molecular weight:

748.94

Ref: TR-E650010

1g		332.00 €
100mg		87.00 €
250mg		154.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Estrone

Controlled Product

CAS:53-16-7

Impurity Estradiol EP Impurity A/ Ethinylestradiol EP Impurity C Applications Estrone is a metabolite of …

Formula:

C₁₈H₂₂O₂

Color and Shape:

White To Off-White

Molecular weight:

270.37

Ref: TR-E889050

1g		98.00 €
5g		131.00 €
10g		220.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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5-Acetyl Rhein

Controlled Product

CAS:875535-35-6

Applications An impurity in the Diacerein (D303000) bulk drug. References Pelletier, J., et al.: Arthritis …

Formula:

C₁₇H₁₀O₇

Color and Shape:

Neat

Molecular weight:

326.26

Ref: TR-A187705

5mg		641.00 €
10mg		1,140.00 €
2500µg		376.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Anhydro Chlortetracycline Hydrochloride

Controlled Product

CAS:65490-24-6

Stability Light Sensitive, Temperature Sensitive Applications Anhydrochlortetracycline is the anhydro analogue and impurity of Chlortetracycline …

Formula:

C₂₂H₂₁ClN₂O₇·ClH

Color and Shape:

Neat

Molecular weight:

497.33

Ref: TR-A637740

10mg		320.00 €
100mg		2,119.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Eltrombopag Methyl Ester

CAS:1246929-01-0

Applications Eltrombopag Methyl Ester, is a metabolite of Eltrombopag (E508000), which is an agonist of …

Formula:

C₂₆H₂₄N₄O₄

Color and Shape:

Neat

Molecular weight:

456.49

Ref: TR-E508005

5mg		315.00 €
50mg		2,114.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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Albendazole Impurity G

CAS:20367-38-8

Impurity Albendazole EP Impurity G / Fenbendazole EP /Impurity B / USP Fenbendazole Related Compound …

Formula:

C₉H₈ClN₃O₂

Color and Shape:

Off White Solid

Molecular weight:

225.63

Ref: TR-M288735

10mg		733.00 €
25mg		1,162.00 €
2500µg		252.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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17-Oxo Dexamethasone

Controlled Product

CAS:1880-61-1

Formula:

C₂₀H₂₅FO₃

Color and Shape:

White

Molecular weight:

332.41

Ref: TR-O855200

5mg		511.00 €
10mg		906.00 €
2500µg		313.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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O-Methyl Atovaquone

CAS:129700-41-0

Impurity Atorvastatin EP Impurity D Applications O-Methyl Atovaquone (Atorvastatin EP Impurity D) is a Atovaquone …

Formula:

C₂₃H₂₁ClO₃

Color and Shape:

Neat

Molecular weight:

380.86

Ref: TR-M288300

10mg		263.00 €
100mg		1,749.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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4-Aminodeoxopteroic Acid

Controlled Product

CAS:36093-85-3

Applications 4-Aminodeoxopteroic Acid, is an intermediate for the synthesis of Aminopterin (A628850), a folic acid …

Formula:

C₁₄H₁₃N₇O₂

Color and Shape:

Neat

Molecular weight:

311.30

Ref: TR-A603895

50mg		268.00 €
500mg		1,760.00 €

Estimated delivery in United States, on Monday 28 Oct 2024

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