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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

2-(3,5-Dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-1,2,4-triazine-3,5(2H,4H)-dione chemical structure

2-(3,5-Dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-1,2,4-triazine-3,5(2H,4H)-dione

CAS: 920509-34-8
Formula: C₁₆H₁₃Cl₂N₅O₄
MW: 410.2 g/mol

VQ-021330

Reference Standard

2-(3,5-Dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxamide chemical structure

2-(3,5-Dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxamide

CAS: 2542029-02-5
Formula: C₁₇H₁₄Cl₂N₆O₅
MW: 453.2 g/mol

VQ-021327

Reference Standard

2-(3,5-Dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylic Acid chemical structure

2-(3,5-Dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylic Acid

CAS: 920509-35-9
Formula: C₁₇H₁₃Cl₂N₅O₆
MW: 454.2 g/mol

VQ-021329

Reference Standard

2-(3,5-Dichlorophenyl)-1,3-benzoxazole-6-carboxylic Acid (2R,3R,4R,5S)-6-(methylamino)hexane-1,2,3,4,5-pentol chemical structure

2-(3,5-Dichlorophenyl)-1,3-benzoxazole-6-carboxylic Acid (2R,3R,4R,5S)-6-(methylamino)hexane-1,2,3,4,5-pentol

CAS: 827022-35-5
Formula: C₃₃H₄₅N₇O₄
MW: 603.8 g/mol

VQ-033031

Reference Standard

2-(3,5-Difluorophenyl)cyclopropan-1-amine chemical structure

2-(3,5-Difluorophenyl)cyclopropan-1-amine

CAS: 1511636-19-3
Formula: C₉H₉F₂N
MW: 169.17 g/mol

VQ-034226

Reference Standard

2-(4-(((2-Cyanoethyl)thio)methyl)thiazol-2-yl)guanidine chemical structure

2-(4-(((2-Cyanoethyl)thio)methyl)thiazol-2-yl)guanidine

CAS: 76823-93-3
Formula: C₈H₁₁N₅S₂
MW: 241.3 g/mol

VQ-030670

Reference Standard

2-(4-(((2,4-Dimethylbenzoyl)oxy)methyl)phenyl)acetic Acid chemical structure

2-(4-(((2,4-Dimethylbenzoyl)oxy)methyl)phenyl)acetic Acid

CAS: 2097334-16-0
Formula: C₁₈H₁₈O₄
MW: 298.3 g/mol

VQ-038592

Reference Standard

2-(4-((1-(Ethoxycarbonyl)-2-oxocyclopentyl)methyl)phenyl)propanoic Acid chemical structure

2-(4-((1-(Ethoxycarbonyl)-2-oxocyclopentyl)methyl)phenyl)propanoic Acid

CAS: 261521-19-1
Formula: C₁₈H₂₂O₅
MW: 318.4 g/mol

VQ-048970

Reference Standard

2-(4-((1-(Methoxycarbonyl)-2-oxocyclopentyl)methyl)phenyl)propanoic Acid chemical structure

2-(4-((1-(Methoxycarbonyl)-2-oxocyclopentyl)methyl)phenyl)propanoic Acid

CAS: 1027957-36-3
Formula: C₁₇H₂₀O₅
MW: 304.34 g/mol

VQ-038177

Reference Standard

2-(4-((1H-1,2,4-Triazol-1-yl)methyl)phenyl)hydrazine-1-sulfonic Acid

2-(4-((1H-1,2,4-Triazol-1-yl)methyl)phenyl)hydrazine-1-sulfonic Acid

CAS: 1034806-43-3
Formula: C₉H₁₁N₅O₃S
MW: 269.28 g/mol

VQ-031072

Reference Standard

2-(4-((2-((4-Cyanophenyl)amino)pyrimidin-4-yl)amino)-3,5-dimethylbenzylidene)-3-(4-((2-((4-cyanophenyl)amino)pyrimidin-4-yl)amino)-3,5-dimethylphenyl)pentanedinitrile

2-(4-((2-((4-Cyanophenyl)amino)pyrimidin-4-yl)amino)-3,5-dimethylbenzylidene)-3-(4-((2-((4-cyanophenyl)amino)pyrimidin-4-yl)amino)-3,5-dimethylphenyl)pentanedinitrile

CAS: 2574567-24-9
Formula: C₄₄H₃₆N₁₂
MW: 732.86 g/mol

VQ-045128

Reference Standard

2-(4-((2-Oxocyclohexylidene)methyl)phenyl)propanoic Acid chemical structure

2-(4-((2-Oxocyclohexylidene)methyl)phenyl)propanoic Acid

CAS: 344338-25-6
Formula: C₁₆H₁₈O₃
MW: 258.31 g/mol

VQ-041370

Reference Standard

2-(4-((5,6-Diphenylpyrazin-2-yl)amino)butoxy)acetic Acid

2-(4-((5,6-Diphenylpyrazin-2-yl)amino)butoxy)acetic Acid

CAS: 2928611-79-2
Formula: C₂₂H₂₃N₃O₃
MW: 377.44 g/mol

VQ-042131

Reference Standard

2-(4-((Methylamino)methyl)thiazol-2-yl)propan-2-ol chemical structure

2-(4-((Methylamino)methyl)thiazol-2-yl)propan-2-ol

CAS: 1051463-24-1
Formula: C₈H₁₄N₂OS
MW: 186.28 g/mol

VQ-029917

Reference Standard

2-(4-(2-((2,4-Dimethylphenyl)thio)phenyl)piperazin-1-yl)succinic Acid

2-(4-(2-((2,4-Dimethylphenyl)thio)phenyl)piperazin-1-yl)succinic Acid

CAS: 2759917-02-5
Formula: C₂₂H₂₆N₂O₄S
MW: 414.52 g/mol

VQ-042952

Reference Standard

2-(4-(2-(4-(1-(2-Ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-N-methoxy-N,2-dimethylpropanamide chemical structure

2-(4-(2-(4-(1-(2-Ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-N-methoxy-N,2-dimethylpropanamide

CAS: 1638785-18-8
Formula: C₃₀H₄₂N₄O₃
MW: 506.7 g/mol

VQ-029437

Reference Standard

2-(4-(2-(4-(1-(2-Methoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic Acid chemical structure

2-(4-(2-(4-(1-(2-Methoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic Acid

CAS: 2767508-98-3
Formula: C₂₇H₃₅N₃O₃
MW: 449.6 g/mol

VQ-020962

Reference Standard

2-(4-(2-(4-(1-(4-(2-Carboxypropan-2-yl)phenethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic Acid chemical structure

2-(4-(2-(4-(1-(4-(2-Carboxypropan-2-yl)phenethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic Acid

CAS: 2411093-91-7
Formula: C₃₆H₄₃N₃O₄
MW: 581.7 g/mol

VQ-020683

Reference Standard

2-(4-(2-(4-(1H-Benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic Acid chemical structure

2-(4-(2-(4-(1H-Benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic Acid

CAS: 2099128-83-1
Formula: C₂₄H₂₉N₃O₂
MW: 391.5 g/mol

VQ-024589

Reference Standard

2-(4-(2-(4,4-Dimethyl-4,5-dihydrooxazol-2-yl)propan-2-yl)phenyl)ethanol chemical structure

2-(4-(2-(4,4-Dimethyl-4,5-dihydrooxazol-2-yl)propan-2-yl)phenyl)ethanol

CAS: 361382-26-5
Formula: C₁₆H₂₃NO₂
MW: 261.36 g/mol

VQ-029443

Reference Standard

2-(4-(2-Bromoethyl)phenyl)-2-methylpropanoic Acid chemical structure

2-(4-(2-Bromoethyl)phenyl)-2-methylpropanoic Acid

CAS: 948552-52-1
Formula: C₁₂H₁₅BrO₂
MW: 271.15 g/mol

VQ-035970

Reference Standard

2-(4-(2-Chloroacetyl)phenyl)-N-methoxy-N,2-dimethylpropanamide chemical structure

2-(4-(2-Chloroacetyl)phenyl)-N-methoxy-N,2-dimethylpropanamide

CAS: 1638785-15-5
Formula: C₁₄H₁₈ClNO₃
MW: 283.75 g/mol

VQ-029441

Reference Standard

2-(4-(2-Chloroacetyl)phenyl)-N,N,2-trimethylpropanamide

2-(4-(2-Chloroacetyl)phenyl)-N,N,2-trimethylpropanamide

CAS: 3028279-52-6
Formula: C₁₄H₁₈ClNO₂
MW: 267.75 g/mol

VQ-047582

Reference Standard

2-(4-(3-(2-(Trifluoromethyl)-10H-phenothiazin-10-yl)propyl)piperazin-1-yl)ethyl stearate chemical structure

2-(4-(3-(2-(Trifluoromethyl)-10H-phenothiazin-10-yl)propyl)piperazin-1-yl)ethyl stearate

CAS: 2285-19-0
Formula: C₄₀H₆₀F₃N₃O₂S
MW: 704 g/mol

VQ-030819

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