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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
Metoprolol Related Compound A ((+/-)1-(ethylamino)-3-[4-(2-methoxyethyl)phenoxy]-propan-2-ol)
REF: 45-1441232CAS: 109632-08-8 		- - -1,583.00 €Tue 03 Dec 24
Sulfamethoxazole Related Compound B (4-amino-N-{4-[N-(5-methylisoxazol-3-yl)sulfamoyl]phenyl}benzenesulfonamide)
REF: 45-1631522CAS: 135529-16-7 		- - -1,699.00 €Tue 03 Dec 24
Ranitidine Related Compound B (N,N'-bis[2-[[[5-[(dimethylamino)methyl]-2-furanyl]methyl]thio]ethyl]-2-nitro-1,1-ethenediamine)
REF: 45-1598609CAS: 72126-78-4 		- - -1,371.00 €Tue 03 Dec 24
Oxybutynin Related Compound A (Phenylcyclohexylglycolic Acid)
REF: 45-1485114CAS: 4335-77-7 		- - -1,477.00 €Tue 03 Dec 24
Acyclovir Related Compound F (N-[9-[(2-Hydroxyethoxy)methyl]-6-oxo-6,9-dihydro-1H-purin-2-yl]acetamide)
REF: 45-1012054CAS: 110104-37-5 		- - -1,292.00 €Tue 03 Dec 24
3-O-Methylmethyldopa
REF: 45-1430509CAS: 6739-31-7 		- - -1,439.00 €Tue 03 Dec 24
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 03 Dec 24
Famciclovir Related Compound A (2-[2-(2-Amino-9H-purin-9-yl)ethyl]propane-1,3-diol] hydrochloride)
REF: 45-1269174CAS: 246021-75-0 		- - -1,371.00 €Tue 03 Dec 24
Oxaliplatin Related Compound D (cis-[(1S,2S)-1,2-cyclohexanediamine-N,N'][oxalato(2-)-O,O']platinum)
REF: 45-1481248CAS: 61758-77-8 		- - -To inquireTue 03 Dec 24
Dicyclomine Related Compound A ([1,1'-Bi(cyclohexane)]-1-carboxylic acid)
REF: 45-1191011CAS: 60263-54-9 		- - -1,292.00 €Tue 03 Dec 24
Pyrazinamide Related Compound A (Pyrazinecarboxylic acid)
REF: 45-1585017CAS: 98-97-5 		- - -1,222.00 €Tue 03 Dec 24
Methotrexate Related Compound E (4-{[(2,4-Diaminopteridin-6-yl)methyl](methyl)amino}benzoic acid, hemihydrochloride)
REF: 45-1414058CAS: 70844-48-3 		- - -1,552.00 €Tue 03 Dec 24
Chlorpheniramine Related Compound B (di(pyridin-2-yl)amine)
REF: 45-1123135CAS: 1202-34-2 		- - -1,477.00 €Tue 03 Dec 24
Clarithromycin Impurity D (N-desmethyl clarithromycin)
REF: 45-1134619CAS: 101666-68-6 		- - -1,531.00 €Tue 03 Dec 24
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 03 Dec 24
Metoprolol Dimer (1,3-Bis[4-(2-methoxyethyl)phenoxy]propan-2-ol)
REF: 45-1441286CAS: 230975-30-1 		- - -1,472.00 €Tue 03 Dec 24
Mebendazole Related Compound D (Methyl 5-benzoyl-1-methylbenzimidazol-2-ylcarbamate)
REF: 45-1375524CAS: 132119-11-0 		- - -1,493.00 €Tue 03 Dec 24
Ibuprofen Related Compound J (2-(4-Isobutyrylphenyl)propanoic acid)
REF: 45-1335596CAS: 65813-55-0 		- - -1,477.00 €Tue 03 Dec 24
Acitretin Related Compound A ((2Z,4E,6E,8E)-9-(4-Methoxy-2,3,6-trimethylphenyl)-3,7-dimethylnona-2,4,6,8-tetraenoic acid)
REF: 45-1011018CAS: 69427-46-9 		- - -1,390.00 €Tue 03 Dec 24
Ketorolac Related Compound C (5-benzoyl-2,3-dihydro-1H-pyrrolizin-1-one)
REF: 45-1356337CAS: 113502-52-6 		- - -1,477.00 €Tue 03 Dec 24
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Metoprolol Related Compound A ((+/-)1-(ethylamino)-3-[4-(2-methoxyethyl)phenoxy]-propan-2-ol)

CAS:109632-08-8
Amino-alcohols, other than those containing more than one kind of oxygen function, their ethers and …
Formula:
C14H23NO3
Color and Shape:
White Clumpy Powder
Molecular weight:
253.16779

Ref: 45-1441232

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Sulfamethoxazole Related Compound B (4-amino-N-{4-[N-(5-methylisoxazol-3-yl)sulfamoyl]phenyl}benzenesulfonamide)

CAS:135529-16-7
Sulfonamides, nesoi
Formula:
C16H16N4O5S2
Color and Shape:
Off-White White Powder
Molecular weight:
408.05621

Ref: 45-1631522

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Ranitidine Related Compound B (N,N'-bis[2-[[[5-[(dimethylamino)methyl]-2-furanyl]methyl]thio]ethyl]-2-nitro-1,1-ethenediamine)

CAS:72126-78-4
Compounds containing an unfused furan ring (whether or
Formula:
C22H35N5O4S2
Color and Shape:
Solid
Molecular weight:
497.21305

Ref: 45-1598609

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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

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Acyclovir Related Compound F (N-[9-[(2-Hydroxyethoxy)methyl]-6-oxo-6,9-dihydro-1H-purin-2-yl]acetamide)

CAS:110104-37-5
Compounds containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure, …
Formula:
C10H13N5O4
Color and Shape:
White Yellow Crystalline Powder
Molecular weight:
267.09675

Ref: 45-1012054

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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

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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 3 Dec 2024
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Famciclovir Related Compound A (2-[2-(2-Amino-9H-purin-9-yl)ethyl]propane-1,3-diol] hydrochloride)

CAS:246021-75-0
Compounds containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure, …
Formula:
C10H15N5O2·HCl
Color and Shape:
Cream Off-White Solid
Molecular weight:
237.12257

Ref: 45-1269174

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Oxaliplatin Related Compound D (cis-[(1S,2S)-1,2-cyclohexanediamine-N,N'][oxalato(2-)-O,O']platinum)

CAS:61758-77-8
Inorganic or organic compounds of precious metals, whether or not chemically defined, or amalgams of …
Formula:
C8H14N2O4Pt
Color and Shape:
White Off-White Crystalline Powder
Molecular weight:
397.06015

Ref: 45-1481248

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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

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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

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Methotrexate Related Compound E (4-{[(2,4-Diaminopteridin-6-yl)methyl](methyl)amino}benzoic acid, …
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Methotrexate Related Compound E (4-{[(2,4-Diaminopteridin-6-yl)methyl](methyl)amino}benzoic acid, hemihydrochloride)

CAS:70844-48-3
Compounds containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure, …
Formula:
C15H15N7O2·5HCl
Color and Shape:
Yellow Tan Orange Solid
Molecular weight:
325.12872

Ref: 45-1414058

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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

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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

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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

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Metoprolol Dimer (1,3-Bis[4-(2-methoxyethyl)phenoxy]propan-2-ol)

CAS:230975-30-1
Ether-alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives, nesoi
Formula:
C21H28O5
Color and Shape:
Colorless Light Yellow Liquid
Molecular weight:
360.19367

Ref: 45-1441286

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Mebendazole Related Compound D (Methyl 5-benzoyl-1-methylbenzimidazol-2-ylcarbamate)

CAS:132119-11-0
Heterocyclic compounds with nitrogen hetero-atom(s) only, aromatic or modified aromatic, nesoi
Formula:
C17H15N3O3
Color and Shape:
Solid
Molecular weight:
309.11134

Ref: 45-1375524

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Ibuprofen Related Compound J (2-(4-Isobutyrylphenyl)propanoic acid)

CAS:65813-55-0
Aromatic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids etc not elsewhere specified or included
Formula:
C13H16O3
Color and Shape:
Brown Solid
Molecular weight:
220.10994

Ref: 45-1335596

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Acitretin Related Compound A ((2Z,4E,6E,8E)-9-(4-Methoxy-2,3,6-trimethylphenyl)-3,7-dimethylnona-2,4,6,8-tetraenoic acid)

CAS:69427-46-9
Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides etc not elsewhere specified …
Formula:
C21H26O3
Color and Shape:
Yellow Crystalline Powder
Molecular weight:
326.18819

Ref: 45-1011018

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Ketorolac Related Compound C (5-benzoyl-2,3-dihydro-1H-pyrrolizin-1-one)

CAS:113502-52-6
Aromatic or modified aromatic heterocyclic compounds withnitrogen hetero-atom(s) only nesoi
Formula:
C14H11NO2
Color and Shape:
Yellow Solid
Molecular weight:
225.07898

Ref: 45-1356337

Estimated delivery in United States, on Tuesday 3 Dec 2024
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