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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

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COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

4-(7-(6-Cyano-5-(trifluoromethyl)pyridin-3-yl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-5-yl)-N-(1-((6-cyano-5-(trifluoromethyl)pyridin-3-yl)carbamoyl)cyclobutyl)-2-fluoro-N-(3-fluoro-4-(methylcarbamoyl)phenyl)benzamide chemical structure

4-(7-(6-Cyano-5-(trifluoromethyl)pyridin-3-yl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-5-yl)-N-(1-((6-cyano-5-(trifluoromethyl)pyridin-3-yl)carbamoyl)cyclobutyl)-2-fluoro-N-(3-fluoro-4-(methylcarbamoyl)phenyl)benzamide

CAS: 2894796-77-9
Formula: C₄₀H₂₇F₈N₉O₄S
MW: 881.8 g/mol

VQ-035748

Reference Standard

4-(7-(6-Cyano-5-(trifluoromethyl)pyridin-3-yl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-5-yl)-N-methylbenzamide chemical structure

4-(7-(6-Cyano-5-(trifluoromethyl)pyridin-3-yl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-5-yl)-N-methylbenzamide

CAS: 1332389-57-7
Formula: C₂₁H₁₆F₃N₅O₂S
MW: 459.4 g/mol

VQ-024306

Reference Standard

4-(8-Amino-3-(4-(but-2-ynamido)butanoyl)imidazo[1,5-a]pyrazin-1-yl)-N-(pyridin-2-yl)benzamide chemical structure

4-(8-Amino-3-(4-(but-2-ynamido)butanoyl)imidazo[1,5-a]pyrazin-1-yl)-N-(pyridin-2-yl)benzamide

CAS: 2230757-47-6
Formula: C₂₆H₂₃N₇O₃
MW: 481.5 g/mol

VQ-021393

Reference Standard

4-(8-Chloro-5H-dibenzo[b,e][1,4]diazepin-11-yl)-1-piperazinecarboxylic Acid-d8 1,1-Dimethylethyl Ester

4-(8-Chloro-5H-dibenzo[b,e][1,4]diazepin-11-yl)-1-piperazinecarboxylic Acid-d8 1,1-Dimethylethyl Ester

CAS: 2733718-84-6
Formula: C₂₂H₁₇ClD₈N₄O₂
MW: 420.96 g/mol

VQ-047857

Reference Standard

4-(Aminomethyl)pyridine chemical structure

4-(Aminomethyl)pyridine

CAS: 3731-53-1
Formula: C₆H₈N₂
MW: 108.14 g/mol

VQ-043870

Reference Standard

4-(Azidomethyl)-2-butyl-5-chloro-1H-imidazole chemical structure

4-(Azidomethyl)-2-butyl-5-chloro-1H-imidazole

CAS: 2353190-33-5
Formula: C₈H₁₂ClN₅
MW: 213.67 g/mol

VQ-023005

Reference Standard

4-(Azidomethyl)-5-methyl-1,3-dioxol-2-one

4-(Azidomethyl)-5-methyl-1,3-dioxol-2-one

CAS: 2243064-11-9
Formula: C₅H₅N₃O₃
MW: 155.11 g/mol

VQ-049301

Reference Standard

4-(Benzyloxy)-3-methoxy-2-nitrobenzonitrile chemical structure

4-(Benzyloxy)-3-methoxy-2-nitrobenzonitrile

CAS: 1019115-11-7
Formula: C₁₅H₁₂N₂O₄
MW: 284.27 g/mol

VQ-043620

Reference Standard

4-(Benzyloxy)-5-methoxy-2-nitrobenzoic Acid chemical structure

4-(Benzyloxy)-5-methoxy-2-nitrobenzoic Acid

CAS: 60547-92-4
Formula: C₁₅H₁₃NO₆
MW: 303.27 g/mol

VQ-045248

Reference Standard

4-(Benzyloxycarbonylamino)-2-fluorophenylboronicacid chemical structure

4-(Benzyloxycarbonylamino)-2-fluorophenylboronicacid

CAS: 874290-59-2
Formula: C₁₄H₁₃BFNO₄
MW: 289.07 g/mol

VQ-040341

Reference Standard

4-(Bis(isopropyl)amino)-2,2-diphenylbutyronitrile chemical structure

4-(Bis(isopropyl)amino)-2,2-diphenylbutyronitrile

CAS: 77-11-2
Formula: C₂₂H₂₈N₂
MW: 320.5 g/mol

VQ-044357

Reference Standard

4-(Bromomethyl)-[1,1'-biphenyl]-2-carbonitrile chemical structure

4-(Bromomethyl)-[1,1'-biphenyl]-2-carbonitrile

CAS: 210037-90-4
Formula: C₁₄H₁₀BrN
MW: 272.14 g/mol

VQ-037733

Reference Standard

4-(Bromomethyl)-1,2-dimethoxybenzene chemical structure

4-(Bromomethyl)-1,2-dimethoxybenzene

CAS: 21852-32-4
Formula: C₉H₁₁BrO₂
MW: 231.09 g/mol

VQ-042858

Reference Standard

4-(Bromomethyl)-2-methyl-1-(trifluoromethoxy)benzene chemical structure

4-(Bromomethyl)-2-methyl-1-(trifluoromethoxy)benzene

CAS: 1261679-35-9
Formula: C₉H₈BrF₃O
MW: 269.06 g/mol

VQ-034887

Reference Standard

4-(Bromomethyl)-3-hydroxybenzonitrile chemical structure

4-(Bromomethyl)-3-hydroxybenzonitrile

CAS: 1261553-82-5
Formula: C₈H₆BrNO
MW: 212.04 g/mol

VQ-030740

Reference Standard

4-(Butylamino)benzoic Acid Ethyl Ester chemical structure

4-(Butylamino)benzoic Acid Ethyl Ester

CAS: 94-32-6
Formula: C₁₃H₁₉NO₂
MW: 221.29 g/mol

VQ-024554

Reference Standard

4-(Chloromethyl)-2-((dimethylamino)methyl)-4,5-dihydrothiazol-4-ol chemical structure

4-(Chloromethyl)-2-((dimethylamino)methyl)-4,5-dihydrothiazol-4-ol

CAS: 92759-37-0
Formula: C₇H₁₃ClN₂OS
MW: 208.71 g/mol

VQ-026940

Reference Standard

4-(Chloromethyl)-2-isopropylthiazole hydrochloride chemical structure

4-(Chloromethyl)-2-isopropylthiazole hydrochloride

CAS: 65386-28-9
Formula: C₇H₁₁Cl₂NS
MW: 212.14 g/mol

VQ-051071

Reference Standard

4-(Cyclohexanecarbonyl)-1-phenethyl-3,4-dihydropyrazin-2(1H)-one chemical structure

4-(Cyclohexanecarbonyl)-1-phenethyl-3,4-dihydropyrazin-2(1H)-one

CAS: 94494-35-6
Formula: C₁₉H₂₄N₂O₂
MW: 312.4 g/mol

VQ-033290

Reference Standard

4-(Cyclopropylcarbonyl)-α,α-dimethylbenzeneacetic Acid chemical structure

4-(Cyclopropylcarbonyl)-α,α-dimethylbenzeneacetic Acid

CAS: 162096-54-0
Formula: C₁₄H₁₆O₃
MW: 232.27 g/mol

VQ-025771

Reference Standard

4-(Cyclopropylcarbonyl)-α,α-dimethylbenzeneacetic Acid Methyl Ester chemical structure

4-(Cyclopropylcarbonyl)-α,α-dimethylbenzeneacetic Acid Methyl Ester

CAS: 880088-78-8
Formula: C₁₅H₁₈O₃
MW: 246.3 g/mol

VQ-025772

Reference Standard

4-(Cyclopropylmethoxy)-3-(difluoromethoxy) Roflumilast chemical structure

4-(Cyclopropylmethoxy)-3-(difluoromethoxy) Roflumilast

CAS: 162401-43-6
Formula: C₁₇H₁₄Cl₂F₂N₂O₃
MW: 403.2 g/mol

VQ-033629

Reference Standard

4-(Dibromomethyl)benzonitrile chemical structure

4-(Dibromomethyl)benzonitrile

CAS: 67013-55-2
Formula: C₈H₅Br₂N
MW: 274.94 g/mol

VQ-029069

Reference Standard

4-(Dichloromethyl)-N-(4-methyl-3-((4-(pyridin-3-yl)pyrimidin-2-yl)amino)phenyl)benzamide chemical structure

4-(Dichloromethyl)-N-(4-methyl-3-((4-(pyridin-3-yl)pyrimidin-2-yl)amino)phenyl)benzamide

CAS: 581076-66-6
Formula: C₂₄H₁₉Cl₂N₅O
MW: 464.3 g/mol

VQ-048656

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