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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

5-(2,2-Dimethyl-4H-1,3-benzodioxin-6-yl)-1,3-oxazolidin-2-one chemical structure

5-(2,2-Dimethyl-4H-1,3-benzodioxin-6-yl)-1,3-oxazolidin-2-one

CAS: 452340-96-4
Formula: C₁₃H₁₅NO₄
MW: 249.26 g/mol

VQ-034601

Reference Standard

5-(2,3-Dihydro-1H-inden-2-yl)-1H-imidazole chemical structure

5-(2,3-Dihydro-1H-inden-2-yl)-1H-imidazole

CAS: 104054-12-8
Formula: C₁₂H₁₂N₂
MW: 184.24 g/mol

VQ-047457

Reference Standard

5-(2,4-Difluorophenyl)-1H-pyrrole-3-carbaldehyde chemical structure

5-(2,4-Difluorophenyl)-1H-pyrrole-3-carbaldehyde

CAS: 2827733-29-7
Formula: C₁₁H₇F₂NO
MW: 207.18 g/mol

VQ-045011

Reference Standard

5-(2,6-Difluorophenyl)-1H-pyrrole-3-carbaldehyde chemical structure

5-(2,6-Difluorophenyl)-1H-pyrrole-3-carbaldehyde

CAS: 928324-50-9
Formula: C₁₁H₇F₂NO
MW: 207.18 g/mol

VQ-044479

Reference Standard

5-(3-(2,5-Dichloro-4,6-dimethylpyridin-3-yl)-1,2,4-oxadiazol-5-yl)-3-nitrobenzene-1,2-diol chemical structure

5-(3-(2,5-Dichloro-4,6-dimethylpyridin-3-yl)-1,2,4-oxadiazol-5-yl)-3-nitrobenzene-1,2-diol

CAS: 952091-17-7
Formula: C₁₅H₁₀Cl₂N₄O₅
MW: 397.2 g/mol

VQ-023340

Reference Standard

5-(3-Aminopropyl)-4,5,6-trihydroxy-1,3,2,4,6-dioxatriphosphinane 2,4,6-trioxide chemical structure

5-(3-Aminopropyl)-4,5,6-trihydroxy-1,3,2,4,6-dioxatriphosphinane 2,4,6-trioxide

CAS: 165043-19-6
Formula: C₄H₁₁NO₈P₃⁺
MW: 294.05 g/mol

VQ-028886

Reference Standard

5-(3-Bromophenyl)-4,6-dichloropyrimidine chemical structure

5-(3-Bromophenyl)-4,6-dichloropyrimidine

CAS: 1532412-37-5
Formula: C₁₀H₅BrCl₂N₂
MW: 303.97 g/mol

VQ-031705

Reference Standard

5-(3-Chloropropyl)-1-cyclohexyltetrazole chemical structure

5-(3-Chloropropyl)-1-cyclohexyltetrazole

CAS: 73963-29-8
Formula: C₁₀H₁₇ClN₄
MW: 228.72 g/mol

VQ-038149

Reference Standard

5-(3-Fluorophenyl)-1H-pyrrole-3-carboxaldehyde chemical structure

5-(3-Fluorophenyl)-1H-pyrrole-3-carboxaldehyde

CAS: 2827733-27-5
Formula: C₁₁H₈FNO
MW: 189.19 g/mol

VQ-028744

Reference Standard

5-(3-Fluorophenyl)-5-oxovaleric acid chemical structure

5-(3-Fluorophenyl)-5-oxovaleric acid

CAS: 845790-38-7
Formula: C₁₁H₁₁FO₃
MW: 210.2 g/mol

VQ-025700

Reference Standard

5-(3,4,5-Trimethoxybenzyl)pyrimidin- 2,4-diol chemical structure

5-(3,4,5-Trimethoxybenzyl)pyrimidin- 2,4-diol

CAS: 93885-69-9
Formula: C₁₄H₁₆N₂O₅
MW: 292.29 g/mol

VQ-028544

Reference Standard

5-(4-((3-Chloro-4-((3-fluorobenzyl)oxy)phenyl)amino)quinazolin-6-yl)furan-2-carboxylic Acid chemical structure

5-(4-((3-Chloro-4-((3-fluorobenzyl)oxy)phenyl)amino)quinazolin-6-yl)furan-2-carboxylic Acid

CAS: 1152131-73-1
Formula: C₂₆H₁₇ClFN₃O₄
MW: 489.9 g/mol

VQ-043205

Reference Standard

5-(4-(1-Carboxyethyl)benzyl)-6-methoxy-6-oxohexanoic acid

5-(4-(1-Carboxyethyl)benzyl)-6-methoxy-6-oxohexanoic acid

CAS: 2973044-47-0
Formula: C₁₇H₂₂O₆
MW: 322.35 g/mol

VQ-048969

Reference Standard

5-(4-(2-(5-Ethylpyridin-2-yl)ethoxy)benzylidene)thiazolidine-2,4-dione chemical structure

5-(4-(2-(5-Ethylpyridin-2-yl)ethoxy)benzylidene)thiazolidine-2,4-dione

CAS: 144809-28-9
Formula: C₁₉H₁₈N₂O₃S
MW: 354.4 g/mol

VQ-033192

Reference Standard

5-(4-(Bromomethyl)-[1,1'-biphenyl]-2-yl)-1-trityl-1H-tetrazole chemical structure

5-(4-(Bromomethyl)-[1,1'-biphenyl]-2-yl)-1-trityl-1H-tetrazole

CAS: 159532-62-4
Formula: C₃₃H₂₅BrN₄
MW: 557.5 g/mol

VQ-049308

Reference Standard

5-(4-Bromobutoxy)-3,4-dihydroquinolin-2(1H)-one chemical structure

5-(4-Bromobutoxy)-3,4-dihydroquinolin-2(1H)-one

CAS: 63309-35-3
Formula: C₁₃H₁₆BrNO₂
MW: 298.18 g/mol

VQ-043978

Reference Standard

5-(4-Bromobutoxy)quinolin-2(1H)-one chemical structure

5-(4-Bromobutoxy)quinolin-2(1H)-one

CAS: 2514958-62-2
Formula: C₁₃H₁₄BrNO₂
MW: 296.16 g/mol

VQ-036019

Reference Standard

5-(4-Bromophenyl)-4-chloro-6-methoxypyrimidine

5-(4-Bromophenyl)-4-chloro-6-methoxypyrimidine

CAS: 2518002-08-7
Formula: C₁₁H₈BrClN₂O
MW: 299.55 g/mol

VQ-031708

Reference Standard

5-(4-Bromophenyl)-4,6-dichloropyrimidine chemical structure

5-(4-Bromophenyl)-4,6-dichloropyrimidine

CAS: 146533-41-7
Formula: C₁₀H₅BrCl₂N₂
MW: 303.97 g/mol

VQ-023370

Reference Standard

5-(4-Bromophenyl)-6-(vinyloxy)pyrimidin-4-amine chemical structure

5-(4-Bromophenyl)-6-(vinyloxy)pyrimidin-4-amine

CAS: 2211054-17-8
Formula: C₁₂H₁₀BrN₃O
MW: 292.13 g/mol

VQ-034863

Reference Standard

5-(4-Bromophenyl)-6-chloro-N-propylpyrimidin-4-amine chemical structure

5-(4-Bromophenyl)-6-chloro-N-propylpyrimidin-4-amine

CAS: 2514735-21-6
Formula: C₁₃H₁₃BrClN₃
MW: 326.62 g/mol

VQ-049001

Reference Standard

5-(4-Bromophenyl)pyrimidine-4,6-diol chemical structure

5-(4-Bromophenyl)pyrimidine-4,6-diol

CAS: 706811-25-8
Formula: C₁₀H₇BrN₂O₂
MW: 267.08 g/mol

VQ-023014

Reference Standard

5-(4-Chlorobutyl)-1-cyclohexyltetrazole chemical structure

5-(4-Chlorobutyl)-1-cyclohexyltetrazole

CAS: 73963-42-5
Formula: C₁₁H₁₉ClN₄
MW: 242.75 g/mol

VQ-022182

Reference Standard

5-(4-Fluorophenyl)-1H-pyrrole-3-carbaldehyde chemical structure

5-(4-Fluorophenyl)-1H-pyrrole-3-carbaldehyde

CAS: 2827733-28-6
Formula: C₁₁H₈FNO
MW: 189.19 g/mol

VQ-028739

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