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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

1 Mercaptomethyl cyclopropaneacetonitrile chemical structure

1 Mercaptomethyl cyclopropaneacetonitrile

CAS: 866923-64-0
Formula: C₆H₉NS
MW: 127.21 g/mol

VQ-038491

Reference Standard

1`-Epi Gemcitabine 3`,5`-Dibenzoate chemical structure

1`-Epi Gemcitabine 3`,5`-Dibenzoate

CAS: 134790-40-2
Formula: C₂₃H₁₉F₂N₃O₆
MW: 471.4 g/mol

VQ-037501

Reference Standard

1`N-Benzyl Biotin chemical structure

1`N-Benzyl Biotin

CAS: 76335-62-1
Formula: C₁₇H₂₂N₂O₃S
MW: 334.4 g/mol

VQ-029448

Reference Standard

1-?(2-?Iodoethyl)?-?2-?octylbenzene chemical structure

1-?(2-?Iodoethyl)?-?2-?octylbenzene

CAS: 162358-96-5
Formula: C₁₆H₂₅I
MW: 344.27 g/mol

VQ-037284

Reference Standard

1-(((2R,3S)-2-(2,4-Difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole chemical structure

1-(((2R,3S)-2-(2,4-Difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole

CAS: 127000-90-2
Formula: C₁₂H₁₁F₂N₃O
MW: 251.23 g/mol

VQ-025497

Reference Standard

1-(((2R,3S)-2-(2,5-Difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole chemical structure

1-(((2R,3S)-2-(2,5-Difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole

CAS: 241479-73-2
Formula: C₁₂H₁₁F₂N₃O
MW: 251.23 g/mol

VQ-048151

Reference Standard

1-(((R)-3-(3-Fluoro-4-(6-(2-methyl-2H-tetrazol-5-yl)pyridin-3-yl)phenyl)-2-oxooxazolidin-5-yl)methoxy)-3-hydroxypropan-2-yl dihydrogen phosphate chemical structure

1-(((R)-3-(3-Fluoro-4-(6-(2-methyl-2H-tetrazol-5-yl)pyridin-3-yl)phenyl)-2-oxooxazolidin-5-yl)methoxy)-3-hydroxypropan-2-yl dihydrogen phosphate

CAS: 1239662-42-0
Formula: C₂₀H₂₂FN₆O₈P
MW: 524.4 g/mol

VQ-034073

Reference Standard

1-((1,3-Dichloropropan-2-yl)oxy)-3-(isopropylamino)propan-2-ol chemical structure

1-((1,3-Dichloropropan-2-yl)oxy)-3-(isopropylamino)propan-2-ol

CAS: 3048706-15-3
Formula: C₉H₁₉Cl₂NO₂
MW: 244.16 g/mol

VQ-027671

Reference Standard

1-((1r,4r)-4-(2-(4-(2,3-Dichloro-4-hydroxyphenyl)piperazin-1-yl)ethyl)cyclohexyl)-3-methylurea

1-((1r,4r)-4-(2-(4-(2,3-Dichloro-4-hydroxyphenyl)piperazin-1-yl)ethyl)cyclohexyl)-3-methylurea

CAS: 1084891-94-0
Formula: C₂₀H₃₀Cl₂N₄O₂
MW: 429.39 g/mol

VQ-044057

Reference Standard

1-((1r,4r)-4-(2-(4-(2,3-Dichloro-4-hydroxyphenyl)piperazin-1-yl)ethyl)cyclohexyl)urea

1-((1r,4r)-4-(2-(4-(2,3-Dichloro-4-hydroxyphenyl)piperazin-1-yl)ethyl)cyclohexyl)urea

CAS: 1084891-93-9
Formula: C₁₉H₂₈Cl₂N₄O₂
MW: 415.36 g/mol

VQ-044058

Reference Standard

1-((1S,2S)-1-Cyano-2-methylcyclopropyl)-5-((S)-2,2-dimethyltetrahydro-2H-pyran-4-yl)-N-methyl-N-phenyl-1H-indole-2-carboxamide chemical structure

1-((1S,2S)-1-Cyano-2-methylcyclopropyl)-5-((S)-2,2-dimethyltetrahydro-2H-pyran-4-yl)-N-methyl-N-phenyl-1H-indole-2-carboxamide

CAS: 2212021-81-1
Formula: C₂₈H₃₁N₃O₂
MW: 441.6 g/mol

VQ-049332

Reference Standard

1-((2-(2,4-Difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole chemical structure

1-((2-(2,4-Difluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazole

CAS: 124627-86-7
Formula: C₁₂H₁₁F₂N₃O
MW: 251.23 g/mol

VQ-044886

Reference Standard

1-((2-Chlorophenyl)(phenyl)methyl)-4-(3-methylbenzyl)piperazine chemical structure

1-((2-Chlorophenyl)(phenyl)methyl)-4-(3-methylbenzyl)piperazine

CAS: 713071-37-5
Formula: C₂₅H₂₇ClN₂
MW: 390.9 g/mol

VQ-031754

Reference Standard

1-((2-Chlorophenyl)diphenylmethyl)-2-methyl-1H-imidazole chemical structure

1-((2-Chlorophenyl)diphenylmethyl)-2-methyl-1H-imidazole

CAS: 98751-53-2
Formula: C₂₃H₁₉ClN₂
MW: 358.9 g/mol

VQ-022245

Reference Standard

1-((2-Fluorophenyl)carbamoyl)cyclopropane-1-carboxylic Acid chemical structure

1-((2-Fluorophenyl)carbamoyl)cyclopropane-1-carboxylic Acid

CAS: 918642-61-2
Formula: C₁₁H₁₀FNO₃
MW: 223.2 g/mol

VQ-024722

Reference Standard

1-((2'-Cyano-[1,1'-biphenyl]-4-yl)methyl)-2-ethoxy-1H-benzo[d]imidazole-7-carboxylic Acid chemical structure

1-((2'-Cyano-[1,1'-biphenyl]-4-yl)methyl)-2-ethoxy-1H-benzo[d]imidazole-7-carboxylic Acid

CAS: 632322-61-3
Formula: C₂₄H₁₉N₃O₃
MW: 397.4 g/mol

VQ-034955

Reference Standard

1-((2R,3S,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-4-(hydroxyimino)-3,4-dihydropyrimidin-2(1H)-one chemical structure

1-((2R,3S,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-4-(hydroxyimino)-3,4-dihydropyrimidin-2(1H)-one

CAS: 13491-41-3
Formula: C₉H₁₃N₃O₆
MW: 259.22 g/mol

VQ-026753

Reference Standard

1-((2R,3S)-3-(4-(4-Cyanophenyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-(((methylglycyl)oxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium Iodide Hydrochloride chemical structure

1-((2R,3S)-3-(4-(4-Cyanophenyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-(((methylglycyl)oxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium Iodide Hydrochloride

CAS: 2169911-48-0
Formula: C₃₅H₃₆ClF₂IN₈O₅S
MW: 881.1 g/mol

VQ-048707

Reference Standard

1-((2R,5R)-5-((7H-Pyrrolo[2,3-d]pyrimidin-4-yl)amino)-2-methylpiperidin-1-yl)prop-2-en-1-one chemical structure

1-((2R,5R)-5-((7H-Pyrrolo[2,3-d]pyrimidin-4-yl)amino)-2-methylpiperidin-1-yl)prop-2-en-1-one

CAS: 1792181-98-6
Formula: C₁₅H₁₉N₅O
MW: 285.34 g/mol

VQ-033578

Reference Standard

1-((2S,3R,4R,5R)-3-Fluoro-4-hydroxy-5-(hydroxymethyl)-3-methyltetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione chemical structure

1-((2S,3R,4R,5R)-3-Fluoro-4-hydroxy-5-(hydroxymethyl)-3-methyltetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione

CAS: 2041584-99-8
Formula: C₁₀H₁₃FN₂O₅
MW: 260.22 g/mol

VQ-028069

Reference Standard

1-((2S,3R,4R,5S)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione

1-((2S,3R,4R,5S)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione

CAS: 110508-94-6
Formula: C₁₀H₁₄N₂O₆
MW: 258.23 g/mol

VQ-044144

Reference Standard

1-((2S,3R,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-hydroxy-1H-imidazole-4-carboxamide chemical structure

1-((2S,3R,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-hydroxy-1H-imidazole-4-carboxamide

CAS: 126077-59-6
Formula: C₉H₁₃N₃O₆
MW: 259.22 g/mol

VQ-038468

Reference Standard

1-((2S,3S,4R,5S)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-4-(hydroxyimino)-3,4-dihydropyrimidin-2(1H)-one chemical structure

1-((2S,3S,4R,5S)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-4-(hydroxyimino)-3,4-dihydropyrimidin-2(1H)-one

CAS: 402725-23-9
Formula: C₉H₁₃N₃O₆
MW: 259.22 g/mol

VQ-031972

Reference Standard

1-((2S,3S,4R,5S)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione chemical structure

1-((2S,3S,4R,5S)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione

CAS: 26879-47-0
Formula: C₁₀H₁₄N₂O₆
MW: 258.23 g/mol

VQ-044145

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