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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

1-(3-Methoxypropyl)piperidin-4-ol chemical structure

1-(3-Methoxypropyl)piperidin-4-ol

CAS: 1225518-03-5
Formula: C₉H₁₉NO₂
MW: 173.25 g/mol

VQ-041754

Reference Standard

1-(3-Methyl-1-phenyl-1H-pyrazol-5-yl)piperazine chemical structure

1-(3-Methyl-1-phenyl-1H-pyrazol-5-yl)piperazine

CAS: 401566-79-8
Formula: C₁₄H₁₈N₄
MW: 242.32 g/mol

VQ-028241

Reference Standard

1-(3-Methylbenzyl)piperazine chemical structure

1-(3-Methylbenzyl)piperazine

CAS: 5321-48-2
Formula: C₁₂H₁₈N₂
MW: 190.28 g/mol

VQ-031758

Reference Standard

1-(3-Methylphenyl)piperazine chemical structure

1-(3-Methylphenyl)piperazine

CAS: 41186-03-2
Formula: C₁₁H₁₆N₂
MW: 176.26 g/mol

VQ-040549

Reference Standard

1-(3-Nitro-10,11-dihydro-5H-dibenzo[B,F]azepin-5-YL)ethanone chemical structure

1-(3-Nitro-10,11-dihydro-5H-dibenzo[B,F]azepin-5-YL)ethanone

CAS: 79752-03-7
Formula: C₁₆H₁₄N₂O₃
MW: 282.29 g/mol

VQ-044335

Reference Standard

1-(3-Prop-1-en-2-ylcyclopentyl)ethanone chemical structure

1-(3-Prop-1-en-2-ylcyclopentyl)ethanone

CAS: 31577-86-3
Formula: C₁₀H₁₆O
MW: 152.23 g/mol

VQ-038042

Reference Standard

1-(3,4-Dichlorophenyl)-1,2-dihydronaphthalene chemical structure

1-(3,4-Dichlorophenyl)-1,2-dihydronaphthalene

CAS: 439134-46-0
Formula: C₁₆H₁₂Cl₂
MW: 275.2 g/mol

VQ-033828

Reference Standard

1-(3,4-Dichlorophenyl)piperazine Hydrochloride chemical structure

1-(3,4-Dichlorophenyl)piperazine Hydrochloride

CAS: 88138-89-0
Formula: C₁₀H₁₃Cl₃N₂
MW: 267.6 g/mol

VQ-043048

Reference Standard

1-(3,4-Diethoxyphenyl)-2-(methyl sulfonyl)ethanamine chemical structure

1-(3,4-Diethoxyphenyl)-2-(methyl sulfonyl)ethanamine

CAS: 1284768-38-2
Formula: C₁₃H₂₁NO₄S
MW: 287.38 g/mol

VQ-029198

Reference Standard

1-(3,4-Dihydroxyphenyl)-2-(methylamino)ethyl Hydrogen Sulfate chemical structure

1-(3,4-Dihydroxyphenyl)-2-(methylamino)ethyl Hydrogen Sulfate

CAS: 2448348-57-8
Formula: C₉H₁₃NO₆S
MW: 263.27 g/mol

VQ-044739

Reference Standard

1-(3,4-Dimethoxy-5-nitrophenyl)ethanone chemical structure

1-(3,4-Dimethoxy-5-nitrophenyl)ethanone

CAS: 134610-32-5
Formula: C₁₀H₁₁NO₅
MW: 225.2 g/mol

VQ-032835

Reference Standard

1-(3,4-Dimethyl-phenyl)-propan-1-one chemical structure

1-(3,4-Dimethyl-phenyl)-propan-1-one

CAS: 17283-12-4
Formula: C₁₁H₁₄O
MW: 162.23 g/mol

VQ-048231

Reference Standard

1-(3,4-Dimethylphenyl)-3-methyl-1H-pyrazol-5(4H)-one chemical structure

1-(3,4-Dimethylphenyl)-3-methyl-1H-pyrazol-5(4H)-one

CAS: 18048-64-1
Formula: C₁₂H₁₄N₂O
MW: 202.25 g/mol

VQ-036958

Reference Standard

1-(3,4-Dimethylphenyl)-5-ethoxy-3-methyl-1H-pyrazole chemical structure

1-(3,4-Dimethylphenyl)-5-ethoxy-3-methyl-1H-pyrazole

CAS: 2500321-37-7
Formula: C₁₄H₁₈N₂O
MW: 230.31 g/mol

VQ-048181

Reference Standard

1-(3,4,5,6-Tetrahydro-2H-azepin-7-yl)azepan-2-one chemical structure

1-(3,4,5,6-Tetrahydro-2H-azepin-7-yl)azepan-2-one

CAS: 22993-71-1
Formula: C₁₂H₂₀N₂O
MW: 208.3 g/mol

VQ-029102

Reference Standard

1-(3,5-Dichlorophenyl) Piperazine chemical structure

1-(3,5-Dichlorophenyl) Piperazine

CAS: 55827-50-4
Formula: C₁₀H₁₂Cl₂N₂
MW: 231.12 g/mol

VQ-043945

Reference Standard

1-(3,6-Dibromopyridin-2-yl)-2-(3,5-difluorophenyl)ethan-1-amine chemical structure

1-(3,6-Dibromopyridin-2-yl)-2-(3,5-difluorophenyl)ethan-1-amine

CAS: 2375019-73-9
Formula: C₁₃H₁₀Br₂F₂N₂
MW: 392.04 g/mol

VQ-037934

Reference Standard

1-(3,7-Dinitro-10,11-Dihydro-5H-dibenzo[b,f]azepin-5-yl)ethan-1-one chemical structure

1-(3,7-Dinitro-10,11-Dihydro-5H-dibenzo[b,f]azepin-5-yl)ethan-1-one

CAS: 79752-04-8
Formula: C₁₆H₁₃N₃O₅
MW: 327.29 g/mol

VQ-044336

Reference Standard

1-(3',4'-Dimethoxyphenyl)-1-propanol chemical structure

1-(3',4'-Dimethoxyphenyl)-1-propanol

CAS: 10548-83-1
Formula: C₁₁H₁₆O₃
MW: 196.24 g/mol

VQ-042589

Reference Standard

1-(4-((4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)amino)quinazolin-6-yl)-4,4-dimethylimidazolidine-2-thione chemical structure

1-(4-((4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)amino)quinazolin-6-yl)-4,4-dimethylimidazolidine-2-thione

CAS: 2954734-92-8
Formula: C₂₆H₂₄N₈OS
MW: 496.6 g/mol

VQ-035291

Reference Standard

1-(4-(1-(((4-Cyclohexyl-3-methylbenzyl)oxy)imino)ethyl)-2-ethylbenzyl)azetidine-3-carboxylic Acid chemical structure

1-(4-(1-(((4-Cyclohexyl-3-methylbenzyl)oxy)imino)ethyl)-2-ethylbenzyl)azetidine-3-carboxylic Acid

CAS: 800380-45-4
Formula: C₂₉H₃₈N₂O₃
MW: 462.6 g/mol

VQ-044475

Reference Standard

1-(4-(1-(2,6-Difluorobenzyl)-3-(6-methoxypyridazin-3-yl)-5-methyl-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl)phenyl)-3-methoxyurea chemical structure

1-(4-(1-(2,6-Difluorobenzyl)-3-(6-methoxypyridazin-3-yl)-5-methyl-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl)phenyl)-3-methoxyurea

CAS: 2681381-03-1
Formula: C₂₇H₂₂F₂N₆O₅S
MW: 580.6 g/mol

VQ-023621

Reference Standard

1-(4-(1-(2,6-Difluorobenzyl)-5-((dimethylamino)methyl)-3-(6-methoxypyridazin-3-yl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl)phenyl)urea chemical structure

1-(4-(1-(2,6-Difluorobenzyl)-5-((dimethylamino)methyl)-3-(6-methoxypyridazin-3-yl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl)phenyl)urea

CAS: 2814571-30-5
Formula: C₂₈H₂₅F₂N₇O₄S
MW: 593.6 g/mol

VQ-023620

Reference Standard

1-(4-(1-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)vinyl)phenyl)ethanone chemical structure

1-(4-(1-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)vinyl)phenyl)ethanone

CAS: 1349659-53-5
Formula: C₂₅H₃₀O
MW: 346.5 g/mol

VQ-021819

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