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
4-(Methyl-d3-amino)-1-(3-pyridyl)-1-butanone Dihydrochloride REF: TR-M287002CAS: 1189727-40-9	- - -	247.00 €~1,550.00 €	Mon 03 Feb 25
GW 501516 Sulfoxide REF: TR-G931505CAS: 1206891-26-0	- - -	227.00 €~1,478.00 €	Mon 03 Feb 25
Propyl Paraben-13C6 REF: TR-P838288CAS: 2075718-26-0	- - -	345.00 €	Mon 03 Feb 25
Phenibut Hydrochloride REF: TR-P296970CAS: 3060-41-1	- - -	260.00 €~357.00 €	Mon 03 Feb 25
Albendazole Impurity G REF: TR-M288735CAS: 20367-38-8	- - -	282.00 €~1,258.00 €	Mon 03 Feb 25
1'-Hydroxy Triazolam REF: TR-H971325CAS: 37115-45-0	- - -	247.00 €	Mon 03 Feb 25
Metoprolol Acid REF: TR-M338785CAS: 56392-14-4	- - -	275.00 €~1,344.00 €	Mon 03 Feb 25
Glycidol-d5 REF: TR-G615702CAS: 1246819-20-4	- - -	212.00 €~1,316.00 €	Mon 03 Feb 25
Etoricoxib N1’-Oxide REF: TR-E934115CAS: 325855-74-1	- - -	376.00 €~2,541.00 €	Mon 03 Feb 25
25-Hydroxyvitamin D3 3-Hemisuccinate REF: TR-H995855CAS: 69511-19-9	- - -	347.00 €~6,031.00 €	Mon 03 Feb 25
2-(2-Methoxyphenoxy)-1,3-propanediol REF: TR-M271630CAS: 14007-09-1	- - -	375.00 €~2,556.00 €	Mon 03 Feb 25
(S)-N-Methyl Naltrexone Bromide REF: TR-M265395CAS: 916045-21-1	- - -	112.00 €~1,667.00 €	Mon 03 Feb 25
Heptadecanoic Acid 3-[2-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-9-yl Ester REF: TR-H281045CAS: 1404053-62-8	- - -	231.00 €~350.00 €	Mon 03 Feb 25
N6-(N-Threonylcarbonyl)adenosine REF: TR-T405560CAS: 24719-82-2	- - -	205.00 €~2,805.00 €	Mon 03 Feb 25
Monobenzyl Phthalate-d4 REF: TR-M524902CAS: 478954-83-5	- - -	370.00 €~2,401.00 €	Mon 03 Feb 25
Monodecarboxy Piperacilloic Acid (Mixture of Diastereomers) REF: TR-M526700CAS: 64817-23-8	- - -	277.00 €~3,055.00 €	Mon 03 Feb 25
7-(S)-Buprenorphine REF: TR-B689765CAS: 152610-73-6	- - -	11,105.00 €	Mon 03 Feb 25
4,4-Tetramethyleneglutarimide REF: TR-T302880CAS: 1075-89-4	- - -	106.00 €~133.00 €	Mon 03 Feb 25
Montelukast Styrene REF: TR-M568030CAS: 918972-54-0	- - -	308.00 €~2,073.00 €	Mon 03 Feb 25
Hawkinsin TFA Salt REF: TR-H195025CAS: 63224-90-8	- - -	363.00 €~1,364.00 €	Mon 03 Feb 25

4-(Methyl-d3-amino)-1-(3-pyridyl)-1-butanone Dihydrochloride

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4-(Methyl-d3-amino)-1-(3-pyridyl)-1-butanone Dihydrochloride

Controlled Product

CAS:1189727-40-9

Applications An amino ketone metabolite of nicotine, and precursor to NNK. Not a dangerous good …

Formula:

C₁₀H₃H₁₁N₂OClH

Color and Shape:

Neat

Molecular weight:

254.17

Ref: TR-M287002

10mg		247.00 €
100mg		1,550.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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GW 501516 Sulfoxide

Controlled Product

CAS:1206891-26-0

Stability Light Sensitive Applications GW 501516 Sulfoxide is a urinary metabolite of GW1516, a drug …

Formula:

C₂₁H₁₈F₃NO₄S₂

Color and Shape:

Neat

Molecular weight:

469.5

Ref: TR-G931505

10mg		227.00 €
25mg		417.00 €
100mg		1,478.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Propyl Paraben-13C6

CAS:2075718-26-0

Formula:

C₄₁₃C₆H₁₂O₃

Color and Shape:

Neat

Molecular weight:

186.16

Ref: TR-P838288

1mg 345.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Phenibut Hydrochloride

CAS:3060-41-1

Applications Phenibut is a derivative of ╬│-Aminobutyric Acid (A602920); an important inhibitory neurotransmitter. Phenibut possesses …

Formula:

C₁₀H₁₃NO₂·ClH

Color and Shape:

Off-White

Molecular weight:

215.68

Ref: TR-P296970

1g		260.00 €
10g		357.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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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		798.00 €
25mg		1,258.00 €
2500µg		282.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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1'-Hydroxy Triazolam

Controlled Product

CAS:37115-45-0

Applications A metabolite of Triazolam (T767380(M)), which is a sedative; a controlled substance (depressant). References …

Formula:

C₁₇H₁₂Cl₂N₄O

Color and Shape:

Light Green

Molecular weight:

359.21

Ref: TR-H971325

5mg 247.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Metoprolol Acid

Controlled Product

CAS:56392-14-4

Impurity Atenolol EP Impurity G; Atenolol USP Related Compound C Stability Hygroscopic Applications The acidic …

Formula:

C₁₄H₂₁NO₄

Color and Shape:

White

Molecular weight:

267.32

Ref: TR-M338785

5mg		275.00 €
10mg		366.00 €
50mg		1,344.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Glycidol-d5

Controlled Product

CAS:1246819-20-4

Applications Labelled Glycidol. Stabilizer in manufacturing of vinyl polymers; intermediate in synthesis of glycerol, glycidyl …

Formula:

C₃H₅HO₂

Color and Shape:

Colourless

Molecular weight:

79.11

Ref: TR-G615702

5mg		212.00 €
25mg		389.00 €
100mg		1,316.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Etoricoxib N1’-Oxide

Controlled Product

CAS:325855-74-1

Applications Etoricoxib N1’-Oxide is an impurity of Etoricoxib (E934100). References Friesen, R., et al.: Bioorg. …

Formula:

C₁₈H₁₅ClN₂O₃S

Color and Shape:

Off White Solid

Molecular weight:

374.84

Ref: TR-E934115

10mg		376.00 €
100mg		2,541.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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25-Hydroxyvitamin D3 3-Hemisuccinate

Controlled Product

CAS:69511-19-9

Stability Light Sensitive, Temperature Sensitive Applications 25-Hydroxyvitamin D3 3-Hemisuccinate is a conjugate of 5-Hydroxyvitamin D3 …

Formula:

C₃₁H₄₈O₅

Color and Shape:

Neat

Molecular weight:

500.71

Ref: TR-H995855

1mg		347.00 €
5mg		1,407.00 €
25mg		6,031.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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2-(2-Methoxyphenoxy)-1,3-propanediol

CAS:14007-09-1

Impurity Guaifenesin EP Impurity B Applications 2-(2-Methoxyphenoxy)-1,3-propanediol is a impurity of Guaifenesin (G810502. Guaifenesin Impurity …

Formula:

C₁₀H₁₄O₄

Color and Shape:

White

Molecular weight:

198.22

Ref: TR-M271630

50mg		375.00 €
500mg		2,556.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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(S)-N-Methyl Naltrexone Bromide

Controlled Product

CAS:916045-21-1

Formula:

C₂₁H₂₆NO₄·Br

Color and Shape:

Neat

Molecular weight:

436.34

Ref: TR-M265395

1mg		112.00 €
100mg		947.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Heptadecanoic Acid 3-[2-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydr…

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Heptadecanoic Acid 3-[2-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-9-yl Ester

CAS:1404053-62-8

Applications Heptadecanoic Acid 3-[2-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-9-yl ester is a derivative of Paliperidone palmitate (P141020). Paliperidone palmitate is …

Formula:

C₄₀H₅₉FN₄O₄

Color and Shape:

White Solid

Molecular weight:

678.92

Ref: TR-H281045

10mg		231.00 €
25mg		350.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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N6-(N-Threonylcarbonyl)adenosine

Controlled Product

CAS:24719-82-2

Applications N6-(N-Threonylcarbonyl)adenosine is an essential modified nucleoside found in tRNA responsible for ANN codons in …

Formula:

C₁₅H₂₀N₆O₈

Color and Shape:

Neat

Molecular weight:

412.35

Ref: TR-T405560

10mg		533.00 €
2500µg		205.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Monobenzyl Phthalate-d4

Controlled Product

CAS:478954-83-5

Applications Labelled Phthalate metabolite, which has been shown to influence preterm deliveries. References Mineno, T., …

Formula:

C₁₅H₄H₈O₄

Color and Shape:

White To Off-White

Molecular weight:

260.28

Ref: TR-M524902

5mg		370.00 €
50mg		2,401.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Monodecarboxy Piperacilloic Acid (Mixture of Diastereomers)

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Monodecarboxy Piperacilloic Acid (Mixture of Diastereomers)

Controlled Product

CAS:64817-23-8

Impurity Piperacillin EP Impurity C Stability Hygroscopic Applications Monodecarboxy Piperacilloic Acid (Piperacillin EP Impurity C) …

Formula:

C₂₂H₂₉N₅O₆S

Color and Shape:

Off White Solid

Molecular weight:

491.561

Ref: TR-M526700

25mg		1,777.00 €
50mg		3,055.00 €
2500µg		277.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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7-(S)-Buprenorphine

Controlled Product

CAS:152610-73-6

Applications 7-(S)-Buprenorphine a derivative of Buprenorphine (B689755), a controlled substance (narcotic). Analgesic that demonstrates narcotic …

Formula:

C₂₉H₄₁NO₄

Color and Shape:

Neat

Molecular weight:

467.64

Ref: TR-B689765

5mg 11,105.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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4,4-Tetramethyleneglutarimide

CAS:1075-89-4

Impurity Buspirone EP Impurity K Applications 4,4-Tetramethyleneglutarimide (Buspirone EP Impurity K) is a Buspirone intermediate. …

Formula:

C₉H₁₃NO₂

Color and Shape:

Neat

Molecular weight:

167.20

Ref: TR-T302880

1g		133.00 €
250mg		106.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Montelukast Styrene

Controlled Product

CAS:918972-54-0

Impurity Montelukast EP Impurity B; Montelukast USP Related Compound F; Montelukast Methylstyrene; Styrene Mo Applications …

Formula:

C₃₅H₃₄ClNO₂S

Color and Shape:

Neat

Molecular weight:

568.17

Ref: TR-M568030

1mg		308.00 €
5mg		1,229.00 €
10mg		2,073.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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Hawkinsin TFA Salt

Controlled Product

CAS:63224-90-8

Applications Hawkinsin is a urinary metabolite from the rare disorder of tyrosine metabolism, known as …

Formula:

C₁₁H₁₇NO₆S•x(C₂HF₃O₂)

Color and Shape:

Neat

Molecular weight:

291.3211402

Ref: TR-H195025

5mg		363.00 €
10mg		648.00 €
25mg		1,364.00 €

Estimated delivery in United States, on Monday 3 Feb 2025

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