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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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BrandProduct dataPurityPrice rangeEstimated delivery
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Oxybutynin Related Compound A (Phenylcyclohexylglycolic Acid)
REF: 45-1485114CAS: 4335-77-7 		- - -1,477.00 €Tue 15 Oct 24
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3-O-Methylmethyldopa
REF: 45-1430509CAS: 6739-31-7 		- - -1,439.00 €Tue 15 Oct 24
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Drometrizole Trisiloxane Related Compound E (2-(2H-Benzotriazol-2-yl)-6-{3-[bis(trimethylsiloxy)methylsilyl]isobutyl}-O1-[bis(trimethylsiloxy)methylsilyl]-p-cresol)
REF: 45-1228064		- - -617.00 €Tue 15 Oct 24
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Dicyclomine Related Compound A ([1,1'-Bi(cyclohexane)]-1-carboxylic acid)
REF: 45-1191011CAS: 60263-54-9 		- - -1,292.00 €Tue 15 Oct 24
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Pyrazinamide Related Compound A (Pyrazinecarboxylic acid)
REF: 45-1585017CAS: 98-97-5 		- - -1,222.00 €Tue 15 Oct 24
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Chlorpheniramine Related Compound B (di(pyridin-2-yl)amine)
REF: 45-1123135CAS: 1202-34-2 		- - -1,477.00 €Tue 15 Oct 24
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Clarithromycin Impurity D (N-desmethyl clarithromycin)
REF: 45-1134619CAS: 101666-68-6 		- - -1,531.00 €Tue 15 Oct 24
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Clomipramine Related Compound D (3-(3,7-Dichloro-10,11-dihydro-5H-dibenzo[b,f]azepin-5-yl)-N,N-dimethylpropan-1-amine hydrochloride)
REF: 45-1140270CAS: 115189-28-1 		- - -1,477.00 €Tue 15 Oct 24
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Pramipexole Related Compound D ((R)-2-Amino-4,5,6,7-tetrahydro-6-(propylamino)benzothiazole dihydrochloride)
REF: 45-1553815CAS: 104632-27-1 		- - -1,371.00 €Tue 15 Oct 24
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Aripiprazole Related Compound B (7-(4-hydroxy-butoxy)-3,4-dihydroquinolin-2(1H)-one)
REF: 45-1042645CAS: 889443-20-3 		- - -1,292.00 €Tue 15 Oct 24
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Molindone Related Compound A (3-Ethyl-2-methyl-1,5,6,7-tetrahydro-4H-indol-4-one)
REF: 45-1445437CAS: 6116-76-3 		- - -1,683.00 €Tue 15 Oct 24
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Ketoprofen Related Compound F (3-(1-Cyanoethyl)benzophenone)
REF: 45-1356585CAS: 42872-30-0 		- - -1,371.00 €Tue 15 Oct 24
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Ecamsule Related Compound F (4-((E)-((1SR,4SR)-7,7-dimethyl-3-oxo-4-(sulfomethyl)bicyclo[2.2.1]heptan-2-ylidene)methyl)benzoic acid)
REF: 45-1231660		- - -1,357.00 €Tue 15 Oct 24
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Rivastigmine Related Compound B ((R,S)-3-[1-(Dimethylamino)ethyl]phenyl dimethylcarbamate)
REF: 45-1604870CAS: 25081-93-0 		- - -1,371.00 €Tue 15 Oct 24
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Spironolactone Related Compound B ((2'R)-7α-(Acetylthio)-5'H-spiro[androst-4-ene-17,2'-furan]-3,5'-dione)
REF: 45-1619028CAS: 132458-33-4 		- - -2,639.00 €Tue 15 Oct 24
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Desogestrel Related Compound B (13-Ethyl-3-hydroxy-11-methylene-18,19-dinor-17α-pregn-4-en-20-yn-17-ol)
REF: 45-1173257CAS: 869627-85-0 		- - -1,552.00 €Tue 15 Oct 24
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Glimepiride Related Compound B (glimepiride sulfonamide, or 3-Ethyl-4-methyl-2-oxo-N-(4-sulfamoylphenethyl)-2,5-dihydro-1H-pyrrole-1-carboxamide)
REF: 45-1292325CAS: 119018-29-0 		- - -1,371.00 €Tue 15 Oct 24
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Olanzapine Related Compound B (2-methyl-10H-thieno-[2,3-b][1,5]benzodiazepin-4[5H]-one)
REF: 45-1478323CAS: 221176-49-4 		- - -1,477.00 €Tue 15 Oct 24
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Atenolol Related Compound B (2-[4-(2,3-Dihydroxypropoxy)phenyl]acetamide)
REF: 45-1044265CAS: 61698-76-8 		- - -1,222.00 €Tue 15 Oct 24
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Metaxalone Related Compound B (1-amino-3-(3,5-dimethylphenoxy)propan-2-ol)
REF: 45-1396168CAS: 66766-07-2 		- - -1,441.00 €Tue 15 Oct 24
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Oxybutynin Related Compound A (Phenylcyclohexylglycolic Acid)

CAS:4335-77-7
Carboxylic acids w/ alcohol function but w/o other oxyg
Formula:
C14H18O3
Color and Shape:
White Crystalline Powder
Molecular weight:
234.12559

Ref: 45-1485114

Estimated delivery in United States, on Tuesday 15 Oct 2024
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3-O-Methylmethyldopa

CAS:6739-31-7
Aromatic amino-alcohol-phenols, aromatic amino-acid-phenols and other aromatic amino compounds with oxygen function
Formula:
C11H15NO4·H2O
Color and Shape:
White Powder
Molecular weight:
225.10011

Ref: 45-1430509

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Drometrizole Trisiloxane Related Compound E (2-(2H-Benzotriazol-2-yl)-6-{3-[bis(trimethylsiloxy)methylsilyl]isobutyl}-O1-[bis(trimethylsiloxy)methylsilyl]-p-cresol)

Aromatic or modified aromatic drugs with nitrogen heter
Formula:
C31H59N3O5Si6
Color and Shape:
Pale Yellow Liquid
Molecular weight:
722.33

Ref: 45-1228064

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Dicyclomine Related Compound A ([1,1'-Bi(cyclohexane)]-1-carboxylic acid)

CAS:60263-54-9
Cyclanic, cyclenic or cycloterpenic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives
Formula:
C13H22O2
Color and Shape:
White Crystalline Powder
Molecular weight:
210.16198

Ref: 45-1191011

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Pyrazinamide Related Compound A (Pyrazinecarboxylic acid)

CAS:98-97-5
Aromatic or modified aromatic heterocyclic compounds withnitrogen hetero-atom(s) only nesoi
Formula:
C5H4N2O2
Color and Shape:
White Off-White Crystalline Powder
Molecular weight:
124.02728

Ref: 45-1585017

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Chlorpheniramine Related Compound B (di(pyridin-2-yl)amine)

CAS:1202-34-2
Compounds containing an unfused pyridine ring in the structure, nesoi
Formula:
C10H9N3
Color and Shape:
Powder
Molecular weight:
171.07965

Ref: 45-1123135

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Clarithromycin Impurity D (N-desmethyl clarithromycin)

CAS:101666-68-6
Lactones nesoi
Formula:
C37H67NO13
Color and Shape:
White Off-White Powder
Molecular weight:
733.46124

Ref: 45-1134619

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Clomipramine Related Compound D (3-(3,7-Dichloro-10,11-dihydro-5H-dibenzo[b,f]azepin-5-yl)-N,N-dimethylpropan-1-amine hydrochloride)

CAS:115189-28-1
Aromatic or modified aromatic drugs with nitrogen hetero-atom(s) only, not elsewhere specified or included
Formula:
C19H22Cl2N2·HCl
Color and Shape:
Off-White Pale Yellow Crystalline Powder
Molecular weight:
348.116

Ref: 45-1140270

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Pramipexole Related Compound D ((R)-2-Amino-4,5,6,7-tetrahydro-6-(propylamino)benzothiazole dihydrochloride)

CAS:104632-27-1
Compounds containing a benzothiazole ring-system (wheth
Formula:
C10H17N3S·2HCl
Color and Shape:
Off-White Powder
Molecular weight:
283.06767

Ref: 45-1553815

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Aripiprazole Related Compound B (7-(4-hydroxy-butoxy)-3,4-dihydroquinolin-2(1H)-one)

CAS:889443-20-3
Lactams, nesoi
Formula:
C13H17NO3
Color and Shape:
White Powder
Molecular weight:
235.12084

Ref: 45-1042645

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Molindone Related Compound A (3-Ethyl-2-methyl-1,5,6,7-tetrahydro-4H-indol-4-one)

CAS:6116-76-3
Heterocyclic compounds (excluding aromatic or modified aromatic) withnitrogen hetero-atom(s) only nesoi
Formula:
C11H15NO
Color and Shape:
Off-White Powder
Molecular weight:
177.11536

Ref: 45-1445437

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Ketoprofen Related Compound F (3-(1-Cyanoethyl)benzophenone)
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Ketoprofen Related Compound F (3-(1-Cyanoethyl)benzophenone)

CAS:42872-30-0
Nitrile function compounds, nesoi
Formula:
C16H13NO
Color and Shape:
White Off-White Powder
Molecular weight:
235.09971

Ref: 45-1356585

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Ecamsule Related Compound F (4-((E)-((1SR,4SR)-7,7-dimethyl-3-oxo-4-(sulfomethyl)bicyclo[2.2.1]heptan-2-ylidene)methyl)benzoic acid)

Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, …
Formula:
C18H20O6S
Color and Shape:
White Powder
Molecular weight:
364.09806

Ref: 45-1231660

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Rivastigmine Related Compound B ((R,S)-3-[1-(Dimethylamino)ethyl]phenyl dimethylcarbamate)
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Rivastigmine Related Compound B ((R,S)-3-[1-(Dimethylamino)ethyl]phenyl dimethylcarbamate)

CAS:25081-93-0
Aromatic cyclic amides (including cyclic carbamates) an
Formula:
C13H20N2O2
Color and Shape:
Pale Yellow Brown Liquid
Molecular weight:
236.15248

Ref: 45-1604870

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Spironolactone Related Compound B ((2'R)-7α-(Acetylthio)-5'H-spiro[androst-4-ene-17,2'-furan]-3,5'-dione)

CAS:132458-33-4
Adrenal cortical hormones and their derivatives nesoi
Formula:
C24H30O4S
Color and Shape:
Off-White Solid
Molecular weight:
414.18648

Ref: 45-1619028

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Desogestrel Related Compound B (13-Ethyl-3-hydroxy-11-methylene-18,19-dinor-17α-pregn-4-en-20-yn-17-ol)

CAS:869627-85-0
Estrogens and progestins
Formula:
C22H30O2
Color and Shape:
White Solid
Molecular weight:
326.22458

Ref: 45-1173257

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Glimepiride Related Compound B (glimepiride sulfonamide, or 3-Ethyl-4-methyl-2-oxo-N-(4-sulfamoylphenethyl)-2,5-dihydro-1H-pyrrole-1-carboxamide)

CAS:119018-29-0
Sulfonamides, nesoi
Formula:
C16H21N3O4S
Color and Shape:
White Powder
Molecular weight:
351.12528

Ref: 45-1292325

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Olanzapine Related Compound B (2-methyl-10H-thieno-[2,3-b][1,5]benzodiazepin-4[5H]-one)
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Olanzapine Related Compound B (2-methyl-10H-thieno-[2,3-b][1,5]benzodiazepin-4[5H]-one)

CAS:221176-49-4
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, nesoi
Formula:
C12H10N2OS
Color and Shape:
Pale Yellow Dark Yellow Powder
Molecular weight:
230.05138

Ref: 45-1478323

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Atenolol Related Compound B (2-[4-(2,3-Dihydroxypropoxy)phenyl]acetamide)

CAS:61698-76-8
Aromatic cyclic amides (including cyclic carbamates) and their derivatives; salts thereof
Formula:
C11H15NO4
Color and Shape:
White Powder
Molecular weight:
225.10011

Ref: 45-1044265

Estimated delivery in United States, on Tuesday 15 Oct 2024
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Metaxalone Related Compound B (1-amino-3-(3,5-dimethylphenoxy)propan-2-ol)
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Metaxalone Related Compound B (1-amino-3-(3,5-dimethylphenoxy)propan-2-ol)

CAS:66766-07-2
Aromatic monoamines not elsewhere specified or included and their derivatives, salts therof
Formula:
C11H17NO2
Color and Shape:
White Powder
Molecular weight:
195.12593

Ref: 45-1396168

Estimated delivery in United States, on Tuesday 15 Oct 2024
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