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
trans-4-[[(2-Amino-3,5-dibromophenyl)methylene]amino]cyclohexanol (Ambroxol Impurity C) REF: TR-A604605CAS: 50910-53-7	- - -	316.00 €~2,114.00 €	Tue 14 Jan 25
Raloxifene-d4 6-Glucuronide REF: TR-R100027CAS: 174264-50-7	- - -	407.00 €~2,776.00 €	Tue 14 Jan 25
5-(4-Morpholinylmethyl)-d2 Delta-Tocopherol, 90% REF: TR-M723792CAS: 936230-74-9	90%	244.00 €~1,632.00 €	Tue 14 Jan 25
δ6-1,2-Dihydro Beclomethasone Dipropionate REF: TR-D448405	- - -	366.00 €~2,488.00 €	Tue 14 Jan 25
N-Ethylpiperazine-d5 Bis(trifluoroacetic Acid) Salt REF: TR-E925497CAS: 1246817-22-0	- - -	236.00 €~1,568.00 €	Tue 14 Jan 25
4-Hydroxy Phenobarbital-d5 REF: TR-H948962CAS: 111342-31-5	- - -	227.00 €~1,602.00 €	Tue 14 Jan 25
Alpha-Etoposide REF: TR-E933745CAS: 100007-53-2	- - -	357.00 €~2,427.00 €	Tue 14 Jan 25
16alpha-Hydroxy Androsterone REF: TR-H828170CAS: 14167-49-8	- - -	260.00 €~1,759.00 €	Tue 14 Jan 25
1-(1H-Benzo[d]imidazol-2-yl)-3-methyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid Sodium Salt REF: TR-B203965CAS: 1163685-30-0	- - -	259.00 €~1,754.00 €	Tue 14 Jan 25
Phlorisovalerophenone REF: TR-P339590CAS: 26103-97-9	- - -	227.00 €~1,603.00 €	Tue 14 Jan 25
(E)-Ethyl 4-(8-chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)-3,4-dihydropyridine-1(2H REF: TR-E902770	- - -	259.00 €~1,749.00 €	Tue 14 Jan 25
Dimethindene-N-oxide Maleate Salt REF: TR-D468270CAS: 188295-03-6	- - -	249.00 €~1,663.00 €	Tue 14 Jan 25
Oseltamivir Acid Hydrochloride REF: TR-O700995CAS: 1415963-60-8	- - -	207.00 €~2,424.00 €	Tue 14 Jan 25
1-Methyl Biguanide Hemisulfate Monohydrate (85%) REF: TR-M294050CAS: 36801-25-9	85%	260.00 €~1,749.00 €	Tue 14 Jan 25
4-Methyl-N-[(1S)-1-methyl-2-[[(4-methylphenyl)sulfonyl]oxy]ethyl]benzenesulfonamide REF: TR-M320405CAS: 88129-44-6	- - -	260.00 €~1,751.00 €	Tue 14 Jan 25
4-epi-Ritonavir REF: TR-R536000CAS: 1414933-81-5	- - -	846.00 €	Tue 14 Jan 25
trans-Itraconazole REF: TR-I937505CAS: 252964-65-1	- - -	1,099.00 €	Tue 14 Jan 25
3-Trifluoromethyl Hydroxychloroquine REF: TR-T815840CAS: 2054858-88-5	- - -	324.00 €~2,136.00 €	Tue 14 Jan 25
Morphinone N-Oxide MCBA Salt (Technical Grade) REF: TR-M652354CAS: 467-02-7	- - -	516.00 €~3,505.00 €	Tue 14 Jan 25
3-Bromo Labetalol REF: TR-B688785CAS: 36894-69-6	- - -	351.00 €~1,179.00 €	Tue 14 Jan 25

trans-4-[[(2-Amino-3,5-dibromophenyl)methylene]amino]cyclohexanol (Ambroxol Impurity C)

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trans-4-[[(2-Amino-3,5-dibromophenyl)methylene]amino]cyclohexanol (Ambroxol Impurity C)

Controlled Product

CAS:50910-53-7

Impurity Ambroxol EP Impurity C Hydrochloride Stability Light Sensitive Applications trans-4-[[(2-Amino-3,5-dibromophenyl)methylene]amino]cyclohexanol is an impurity of …

Formula:

C₁₃H₁₆Br₂N₂O

Color and Shape:

Neat

Molecular weight:

376.09

Ref: TR-A604605

50mg		316.00 €
500mg		2,114.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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Raloxifene-d4 6-Glucuronide

Controlled Product

CAS:174264-50-7

Formula:

C₃₄H₃₁D₄NO₁₀S

Color and Shape:

Neat

Molecular weight:

653.73

Ref: TR-R100027

5mg		2,776.00 €
500µg		407.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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5-(4-Morpholinylmethyl)-d2 Delta-Tocopherol, 90%

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5-(4-Morpholinylmethyl)-d2 Delta-Tocopherol, 90%

Controlled Product

CAS:936230-74-9

Applications Labelled β-Tocopherol intermediate.

Formula:

C₃₂H₅₃D₂NO₃

Purity:

90%

Color and Shape:

Neat

Molecular weight:

503.8

Ref: TR-M723792

5mg		244.00 €
50mg		1,632.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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δ6-1,2-Dihydro Beclomethasone Dipropionate

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δ6-1,2-Dihydro Beclomethasone Dipropionate

Controlled Product

Applications An impurity of Beclomethasone Dipropionate (B131030).

Formula:

C₂₈H₃₇ClO₇

Color and Shape:

Neat

Molecular weight:

521.0422

Ref: TR-D448405

25mg		2,488.00 €
2500µg		366.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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N-Ethylpiperazine-d5 Bis(trifluoroacetic Acid) Salt

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N-Ethylpiperazine-d5 Bis(trifluoroacetic Acid) Salt

Controlled Product

CAS:1246817-22-0

Applications An intermediate in the production of labelled Enrofloxacin. References Chao, Q., et al.: J. …

Formula:

C₁₀H₁₁D₅F₆N₂O₄

Color and Shape:

Neat

Molecular weight:

347.28

Ref: TR-E925497

10mg		236.00 €
100mg		1,568.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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4-Hydroxy Phenobarbital-d5

Controlled Product

CAS:111342-31-5

Formula:

C₁₂H₅H₇N₂O₄

Color and Shape:

Neat

Molecular weight:

253.27

Ref: TR-H948962

1mg		227.00 €
10mg		1,602.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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Alpha-Etoposide

Controlled Product

CAS:100007-53-2

Formula:

C₂₉H₃₂O₁₃

Color and Shape:

Neat

Molecular weight:

588.56

Ref: TR-E933745

1mg		357.00 €
10mg		2,427.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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16alpha-Hydroxy Androsterone

Controlled Product

CAS:14167-49-8

Applications 16α-Hydroxy Androsterone is an impurity of Androsterone (A637535), a steroid hormone with weak androgenic …

Formula:

C₁₉H₃₀O₃

Color and Shape:

Neat

Molecular weight:

306.44

Ref: TR-H828170

10mg		260.00 €
100mg		1,759.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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1-(1H-Benzo[d]imidazol-2-yl)-3-methyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid Sodium Salt

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1-(1H-Benzo[d]imidazol-2-yl)-3-methyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid Sodium Salt

CAS:1163685-30-0

Applications 1-(1H-Benzo[d]imidazol-2-yl)-3-methyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid is an impurity of Rabeprazole. It is also a degradation product formed …

Formula:

C₁₄H₁₀N₃NaO₃

Color and Shape:

Neat

Molecular weight:

291.24

Ref: TR-B203965

1mg		259.00 €
10mg		1,754.00 €
2500µg		591.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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Phlorisovalerophenone

Controlled Product

CAS:26103-97-9

Applications Phlorisovalerophenone is an intermediate in the synthesis of Lupulone (L478000), and anticancer/anti-HIV dimeric phlorglucinols. …

Formula:

C₁₁H₁₄O₄

Color and Shape:

Neat

Molecular weight:

210.23

Ref: TR-P339590

1g		227.00 €
10g		1,603.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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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(…

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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

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 Tuesday 14 Jan 2025

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Dimethindene-N-oxide Maleate Salt

Controlled Product

CAS:188295-03-6

Stability Temperature and Light Sensitive Applications Dimethindene-N-oxide Maleate Salt, a metabolite of the antihistaminic drug …

Formula:

C₂₀H₂₄N₂O•(C₄H₄O₄)

Color and Shape:

Light Yellow

Molecular weight:

308.4211607

Ref: TR-D468270

1mg		249.00 €
5mg		1,063.00 €
10mg		1,663.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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Oseltamivir Acid Hydrochloride

Controlled Product

CAS:1415963-60-8

Applications Oseltamivir Acid Hydrochloride is a metabolite of Oseltamivir (O701000), an orally active inhibitor of …

Formula:

C₁₄H₂₄N₂O₄·ClH

Color and Shape:

Neat

Molecular weight:

320.81

Ref: TR-O700995

10mg		357.00 €
100mg		2,424.00 €
2500µg		207.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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1-Methyl Biguanide Hemisulfate Monohydrate (85%)

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1-Methyl Biguanide Hemisulfate Monohydrate (85%)

Controlled Product

CAS:36801-25-9

Applications N-Demethylated analog of Metformin (M258815) with stimulatory effects on the intracellular portion of human …

Formula:

C₃H₁₁N₅OH₂SO₄

Purity:

85%

Color and Shape:

Off White Solid

Molecular weight:

182.19

Ref: TR-M294050

25mg		260.00 €
250mg		1,749.00 €

Estimated delivery in United States, on Tuesday 14 Jan 2025

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4-Methyl-N-[(1S)-1-methyl-2-[[(4-methylphenyl)sulfonyl]oxy]ethyl]benzenesulfonamide

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4-Methyl-N-[(1S)-1-methyl-2-[[(4-methylphenyl)sulfonyl]oxy]ethyl]benzenesulfonamide

Controlled Product

CAS:88129-44-6

Applications 4-Methyl-N-[(1S)-1-methyl-2-[[(4-methylphenyl)sulfonyl]oxy]ethyl]benzenesulfonamide is an intermediate in the synthesis of chiral annulet of 1,4,7-triazacyclononanes. References Argouarch, …

Formula:

C₁₇H₂₁NO₅S₂

Color and Shape:

Neat

Molecular weight:

383.48