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
Milnacipran Related Compound C ((1RS ,2SR)-2-[(1,3-Dioxoisoindolin-2-yl)methyl]-N,N-diethyl-1-phenylcyclopropane-1-carboxamide) REF: 45-1443680CAS: 105310-75-6	- - -	775.00 €	Fri 27 Dec 24
Uracil Arabinoside REF: 45-1705800CAS: 3083-77-0	- - -	444.00 €	Fri 27 Dec 24
Rufinamide Related Compound B (Methyl 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylate) REF: 45-1606423CAS: 217448-86-7	- - -	1,292.00 €	Fri 27 Dec 24
Testosterone Cypionate Related Compound B (Androst-4,6-dien-3-one-17 β-yl 3-cyclopentylpropanoate) REF: 45-1647023	- - -	887.00 €	Fri 27 Dec 24
Fluorouracil Related Compound E (5-Chloropyrimidine-2,4(1H,3H)-dione) REF: 45-1279054CAS: 1820-81-1	- - -	1,371.00 €	Fri 27 Dec 24
Praziquantel Related Compound B (2-(cyclohexylcarbonyl)-2,3,6,7-tetrahydro-4H-pyrazino [2,1-a]isoquinolin-4-one) REF: 45-1554669CAS: 125273-86-1	- - -	1,477.00 €	Fri 27 Dec 24
Moexipril Related Compound D ((S)-2-{(S)-2-[(S)-4-cyclohexyl-1-ethoxy-1-oxobutan-2-ylamino]propanoyl}-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid hydrochloride) REF: 45-1445631	- - -	581.00 €	Fri 27 Dec 24
Dorzolamide Related Compound D ((4S,6S)-4-Amino-6-methyl-5,6-dihydro-4H-thieno[2,3-b]thiopyran-2-sulfonamide 7,7-dioxide hydrochloride) REF: 45-1225306CAS: 164455-27-0	- - -	1,477.00 €	Fri 27 Dec 24
Zonisamide Related Compound A (1,2-benzisoxazole-3-methanesulfonic acid sodium salt) REF: 45-1725014CAS: 73101-64-1	- - -	1,441.00 €	Fri 27 Dec 24
Testosterone Related Compound C (17α-Hydroxyandrost-4-en-3-one) REF: 45-1646031CAS: 481-30-1	- - -	1,477.00 €	Fri 27 Dec 24
Atenolol Related Compound F (2,2'-[{[(Isopropylazanediyl)bis(2-hydroxypropane-3,1-diyl)]bis(oxy)}bis(4,1-phenylene)]diacetamide) REF: 45-1044367CAS: 87619-83-8	- - -	1,282.00 €	Fri 27 Dec 24
Valproic Acid Related Compound K (2-Ethyl-2-methylpentanoic acid) REF: 45-1708650CAS: 5343-52-2	- - -	1,292.00 €	Fri 27 Dec 24
Metomidate Hydrochloride (Methyl 1-(1-phenylethyl)-1H-imidazole-5-carboxylate hydrochloride) REF: 45-1268772CAS: 35944-74-2	- - -	947.00 €	Fri 27 Dec 24
Losartan Related Compound E (5-[4'-({2-Butyl-5-[(5-{4'-[(2-butyl-4-chloro-5-hydroxymethyl-1H-imidazol-1-yl)methyl]biphenyl-2-yl}-2H-tetrazol-2-yl)methyl]-4-chloro-1H-imidazol-1-yl}methyl)biphenyl-2-yl]tetrazol, potassium salt) REF: 45-1370510	- - -	1,441.00 €	Fri 27 Dec 24
Dicloxacillin Related Compound D (3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid) REF: 45-1189053CAS: 3919-76-4	- - -	1,371.00 €	Fri 27 Dec 24
Imiquimod Related Compound C (4-Chloro-1-isobutyl-1H-imidazo[4,5-c]quinoline) REF: 45-1338346CAS: 99010-64-7	- - -	1,325.00 €	Fri 27 Dec 24
Clarithromycin Impurity Q (Clarithromycin N-oxide) REF: 45-1134631CAS: 118074-07-0	- - -	1,531.00 €	Fri 27 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 €	Fri 27 Dec 24
Brimonidine Related Compound B (1-(5-Bromoquinoxalin-6-yl)thiourea) REF: 45-1076421CAS: 842138-74-3	- - -	1,308.00 €	Fri 27 Dec 24
Salicylic Acid Related Compound B (4-hydroxyisophthalic acid) REF: 45-1609024CAS: 636-46-4	- - -	1,477.00 €	Fri 27 Dec 24

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Milnacipran Related Compound C ((1RS ,2SR)-2-[(1,3-Dioxoisoindolin-2-yl)methyl]-N,N-diethyl-1-phenylcyclopropane-1-carboxamide)

CAS:105310-75-6

Imides and their derivatives (excluding sacharin), salt thereof

Formula:

C₂₃H₂₄N₂O₃

Color and Shape:

Solid

Molecular weight:

376.17869

Ref: 45-1443680

Estimated delivery in United States, on Friday 27 Dec 2024

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Uracil Arabinoside

CAS:3083-77-0

Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, nesoi

Formula:

C₉H₁₂N₂O₆

Color and Shape:

White Off-White Powder

Molecular weight:

244.06954

Ref: 45-1705800

Estimated delivery in United States, on Friday 27 Dec 2024

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Rufinamide Related Compound B (Methyl 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylate)

CAS:217448-86-7

Aromatic or modified aromatic heterocyclic compounds wi

Formula:

C₁₁H₉F₂N₃O₂

Color and Shape:

White Powder

Molecular weight:

253.06628

Ref: 45-1606423

Estimated delivery in United States, on Friday 27 Dec 2024

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Testosterone Cypionate Related Compound B (Androst-4,6-dien-3-one-17 β-yl 3-cyclopentylpropanoate)

Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, …

Formula:

C₂₇H₃₈O₃

Color and Shape:

White Light Yellow Powder

Molecular weight:

410.2821

Ref: 45-1647023

Estimated delivery in United States, on Friday 27 Dec 2024

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Fluorouracil Related Compound E (5-Chloropyrimidine-2,4(1H,3H)-dione)

CAS:1820-81-1

Compounds containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure, …

Formula:

C₄H₃ClN₂O₂

Color and Shape:

White Off-White Powder

Molecular weight:

145.98831

Ref: 45-1279054

Estimated delivery in United States, on Friday 27 Dec 2024

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Praziquantel Related Compound B (2-(cyclohexylcarbonyl)-2,3,6,7-tetrahydro-4H-pyrazino [2,1-a]isoquinolin-4-one)

CAS:125273-86-1

Compounds containing a pyrimidine ring (whether or not

Formula:

C₁₉H₂₂N₂O₂

Color and Shape:

Pale Yellow Powder

Molecular weight:

310.16813

Ref: 45-1554669

Estimated delivery in United States, on Friday 27 Dec 2024

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Moexipril Related Compound D ((S)-2-{(S)-2-[(S)-4-cyclohexyl-1-ethoxy-1-oxobutan-2-ylamino]propanoyl}-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid hydrochloride)

Compounds (excluding drugs and pesticides) containing a

Formula:

C₂₇H₄₁ClN₂O₇

Color and Shape:

Beige Powder

Molecular weight:

540.26023

Ref: 45-1445631

Estimated delivery in United States, on Friday 27 Dec 2024

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Dorzolamide Related Compound D ((4S,6S)-4-Amino-6-methyl-5,6-dihydro-4H-thieno[2,3-b]thiopyran-2-sulfonamide 7,7-dioxide hydrochloride)

CAS:164455-27-0

Sulfonamides, nesoi

Formula:

C₈H₁₂N₂O₄S₃·HCl

Color and Shape:

White Powder

Molecular weight:

295.99592

Ref: 45-1225306

Estimated delivery in United States, on Friday 27 Dec 2024

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Zonisamide Related Compound A (1,2-benzisoxazole-3-methanesulfonic acid sodium salt)

CAS:73101-64-1

Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, nesoi

Formula:

C₈H₇NO₄S

Color and Shape:

Off-White White Powder

Molecular weight:

213.00958

Ref: 45-1725014

Estimated delivery in United States, on Friday 27 Dec 2024

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Testosterone Related Compound C (17α-Hydroxyandrost-4-en-3-one)

CAS:481-30-1

Adrenal cortical hormones and their derivatives nesoi

Formula:

C₁₉H₂₈O₂

Color and Shape:

Powder

Molecular weight:

288.20893

Ref: 45-1646031

Estimated delivery in United States, on Friday 27 Dec 2024

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Atenolol Related Compound F (2,2'-[{[(Isopropylazanediyl)bis(2-hydroxypropane-3,1-diyl)]bis(oxy)}bis(4,1-phenylene)]diacetamide)

CAS:87619-83-8

Aromatic cyclic amides (including cyclic carbamates) and their derivatives; salts thereof

Formula:

C₂₅H₃₅N₃O₆

Color and Shape:

White Powder

Molecular weight:

473.25259

Ref: 45-1044367

Estimated delivery in United States, on Friday 27 Dec 2024

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Valproic Acid Related Compound K (2-Ethyl-2-methylpentanoic acid)

CAS:5343-52-2

Saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides etc, nesoi

Formula:

C₈H₁₆O₂

Color and Shape:

Clear Yellow Oily Liquid

Molecular weight:

144.11503

Ref: 45-1708650

Estimated delivery in United States, on Friday 27 Dec 2024

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Metomidate Hydrochloride (Methyl 1-(1-phenylethyl)-1H-imidazole-5-carboxylate hydrochloride)

CAS:35944-74-2

Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure nesoi

Formula:

C₁₃H₁₄N₂O₂·HCl

Color and Shape:

White Powder

Molecular weight:

230.10553

Ref: 45-1268772

Estimated delivery in United States, on Friday 27 Dec 2024

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Losartan Related Compound E (5-[4'-({2-Butyl-5-[(5-{4'-[(2-butyl-4-chloro-5-hydroxymethyl-1H-imidazol-1-yl)methyl]biphenyl-2-yl}-2H-tetrazol-2-yl)methyl]-4-chloro-1H-imidazol-1-yl}methyl)biphenyl-2-yl]tetrazol, potassium salt)

Compounds containing an unfused imidazole ring, whether or not hydrogenated, in the structure, nesoi

Formula:

C₄₄H₄₃Cl₂KN₁₂O

Color and Shape:

Powder

Molecular weight:

864.26969

Ref: 45-1370510

Estimated delivery in United States, on Friday 27 Dec 2024

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Dicloxacillin Related Compound D (3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxylic acid)

CAS:3919-76-4

Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, nesoi

Formula:

C₁₁H₇Cl₂NO₃

Color and Shape:

Powder

Molecular weight:

270.9803

Ref: 45-1189053

Estimated delivery in United States, on Friday 27 Dec 2024

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Imiquimod Related Compound C (4-Chloro-1-isobutyl-1H-imidazo[4,5-c]quinoline)

CAS:99010-64-7

Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, nesoi

Formula:

C₁₄H₁₄ClN₃

Color and Shape:

White Crystalline Powder

Molecular weight:

259.08763

Ref: 45-1338346

Estimated delivery in United States, on Friday 27 Dec 2024

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Clarithromycin Impurity Q (Clarithromycin N-oxide)

CAS:118074-07-0

Lactones nesoi

Formula:

C₃₈H₆₉NO₁₄

Color and Shape:

White Powder

Molecular weight:

763.47181

Ref: 45-1134631

Estimated delivery in United States, on Friday 27 Dec 2024

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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

Estimated delivery in United States, on Friday 27 Dec 2024

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Brimonidine Related Compound B (1-(5-Bromoquinoxalin-6-yl)thiourea)

CAS:842138-74-3

Heterocyclic compounds with nitrogen hetero-atom(s) only, aromatic or modified aromatic, nesoi

Formula:

C₉H₇BrN₄S

Color and Shape:

White Yellow Powder

Molecular weight:

281.95748

Ref: 45-1076421

Estimated delivery in United States, on Friday 27 Dec 2024

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Salicylic Acid Related Compound B (4-hydroxyisophthalic acid)

CAS:636-46-4

Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides etc, …

Formula:

C₈H₆O₅

Color and Shape:

White Solid

Molecular weight:

182.02152

Ref: 45-1609024

Estimated delivery in United States, on Friday 27 Dec 2024

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