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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-[(4-Carboxymethylphenoxy)methyl]benzoic acid chemical structure

2-[(4-Carboxymethylphenoxy)methyl]benzoic acid

CAS: 55453-89-9
Formula: C₁₆H₁₄O₅
MW: 286.28 g/mol

VQ-044963

Reference Standard

2-[(4-Chlorobenzoyl)amino]acetic acid chemical structure

2-[(4-Chlorobenzoyl)amino]acetic acid

CAS: 13450-77-6
Formula: C₉H₈ClNO₃
MW: 213.62 g/mol

VQ-026057

Reference Standard

2-[(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine chemical structure

2-[(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine

CAS: 122368-54-1
Formula: C₁₇H₁₉ClN₂O
MW: 302.8 g/mol

VQ-028920

Reference Standard

2-[(5-Bromo-2-methylphenyl)methyl]-5-(4-fluorophenyl)-thiophene chemical structure

2-[(5-Bromo-2-methylphenyl)methyl]-5-(4-fluorophenyl)-thiophene

CAS: 1030825-20-7
Formula: C₁₈H₁₄BrFS
MW: 361.3 g/mol

VQ-021053

Reference Standard

2-[(5-Chloro-2,1,3-benzothiadiazol-4-yl)amino]-3,5-dihydro-4H-imidazol-4-one chemical structure

2-[(5-Chloro-2,1,3-benzothiadiazol-4-yl)amino]-3,5-dihydro-4H-imidazol-4-one

CAS: 125292-32-2
Formula: C₉H₆ClN₅OS
MW: 267.7 g/mol

VQ-028412

Reference Standard

2-[(8S)-2,6,7,8-Tetrahydro-1H-cyclopenta[e][1]benzofuran-8-yl]ethanamine Hydrochloride chemical structure

2-[(8S)-2,6,7,8-Tetrahydro-1H-cyclopenta[e][1]benzofuran-8-yl]ethanamine Hydrochloride

CAS: 196597-80-5
Formula: C₁₃H₁₈ClNO
MW: 239.74 g/mol

VQ-033435

Reference Standard

2-[(Diphenylmethyl)thio]acetic Acid chemical structure

2-[(Diphenylmethyl)thio]acetic Acid

CAS: 63547-22-8
Formula: C₁₅H₁₄O₂S
MW: 258.3 g/mol

VQ-028811

Reference Standard

2-[(E)-2,6-Dichlorophenylimino]-1-(1-{2-[(E)-2,6-dichlorophenylimino]-imidazolidin-1-yl}-ethyl)-imidazolidine chemical structure

2-[(E)-2,6-Dichlorophenylimino]-1-(1-{2-[(E)-2,6-dichlorophenylimino]-imidazolidin-1-yl}-ethyl)-imidazolidine

CAS: 2519452-56-1
Formula: C₂₀H₂₀Cl₄N₆
MW: 486.2 g/mol

VQ-025055

Reference Standard

2-[(Ethylamino)methyl]-4-nitrophenol chemical structure

2-[(Ethylamino)methyl]-4-nitrophenol

CAS: 71130-60-4
Formula: C₉H₁₂N₂O₃
MW: 196.2 g/mol

VQ-035079

Reference Standard

2-[(Methylsulfanyl)methyl]oxirane chemical structure

2-[(Methylsulfanyl)methyl]oxirane

CAS: 45378-62-9
Formula: C₄H₈OS
MW: 104.17 g/mol

VQ-035093

Reference Standard

2-[(S)-(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine (2R,3R)-2,3-Dihydroxybutanedioate chemical structure

2-[(S)-(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine (2R,3R)-2,3-Dihydroxybutanedioate

CAS: 210095-58-2
Formula: C₂₁H₂₅ClN₂O₇
MW: 452.9 g/mol

VQ-021790

Reference Standard

2-[[(5-Nitro-2-thiazolyl)amino]carbonyl]phenyl 2-(acetyloxy)benzoate chemical structure

2-[[(5-Nitro-2-thiazolyl)amino]carbonyl]phenyl 2-(acetyloxy)benzoate

CAS: 952686-58-7
Formula: C₁₉H₁₃N₃O₇S
MW: 427.4 g/mol

VQ-023269

Reference Standard

2-[[(Aminothioxomethyl)amino]carbonyl]-2-ethyl-3-methylhexanoic Acid chemical structure

2-[[(Aminothioxomethyl)amino]carbonyl]-2-ethyl-3-methylhexanoic Acid

CAS: 93227-84-0
Formula: C₁₁H₂₀N₂O₃S
MW: 260.36 g/mol

VQ-034202

Reference Standard

2-[[[[(1,4-Dihydro-6-methyl-4-oxo-1,3,5-triazin-2-yl)methylamino]carbonyl]amino]sulfonyl]benzoic Aci chemical structure

2-[[[[(1,4-Dihydro-6-methyl-4-oxo-1,3,5-triazin-2-yl)methylamino]carbonyl]amino]sulfonyl]benzoic Aci

CAS: 879554-48-0
Formula: C₁₄H₁₅N₅O₆S
MW: 381.37 g/mol

VQ-043649

Reference Standard

2-[[3,4-Dihydro-3-methyl-2,4-dioxo-6-[(3R)-3-piperidinylamino]-1(2H)-pyrimidinyl]methyl]-benzonitrile chemical structure

2-[[3,4-Dihydro-3-methyl-2,4-dioxo-6-[(3R)-3-piperidinylamino]-1(2H)-pyrimidinyl]methyl]-benzonitrile

CAS: 2089611-85-6
Formula: C₁₈H₂₁N₅O₂
MW: 339.4 g/mol

VQ-020765

Reference Standard

2-[[4-(2-Pyridinyl)phenyl]methyl]hydrazinecarboxylic Acid 1,1-Dimethylethyl Ester chemical structure

2-[[4-(2-Pyridinyl)phenyl]methyl]hydrazinecarboxylic Acid 1,1-Dimethylethyl Ester

CAS: 198904-85-7
Formula: C₁₇H₂₁N₃O₂
MW: 299.37 g/mol

VQ-024383

Reference Standard

2-[1-(Carbamoylmethyl)cyclopentyl]acetic Acid chemical structure

2-[1-(Carbamoylmethyl)cyclopentyl]acetic Acid

CAS: 60143-00-2
Formula: C₉H₁₅NO₃
MW: 185.22 g/mol

VQ-036057

Reference Standard

2-[2-(2-Chloro-3,4-dimethoxyphenyl)ethylamino]-1-(4-methoxyphenyl)ethanol chemical structure

2-[2-(2-Chloro-3,4-dimethoxyphenyl)ethylamino]-1-(4-methoxyphenyl)ethanol

CAS: 71636-38-9
Formula: C₁₉H₂₄ClNO₄
MW: 365.8 g/mol

VQ-042865

Reference Standard

2-[2-(2,2,2-Trifluoroethoxy)phenoxy]-ethanol chemical structure

2-[2-(2,2,2-Trifluoroethoxy)phenoxy]-ethanol

CAS: 160969-02-8
Formula: C₁₀H₁₁F₃O₃
MW: 236.19 g/mol

VQ-038934

Reference Standard

2-[2-(2,2,2-Trifluoroethoxy)phenoxy]ethyl methanesulfonate chemical structure

2-[2-(2,2,2-Trifluoroethoxy)phenoxy]ethyl methanesulfonate

CAS: 160969-03-9
Formula: C₁₁H₁₃F₃O₅S
MW: 314.28 g/mol

VQ-028030

Reference Standard

2-[2-(3-Methoxyphenyl)ethenyl]phenol chemical structure

2-[2-(3-Methoxyphenyl)ethenyl]phenol

CAS: 143212-74-2
Formula: C₁₅H₁₄O₂
MW: 226.27 g/mol

VQ-042103

Reference Standard

2-[2-(Dimethylamino)ethyl]pyridine chemical structure

2-[2-(Dimethylamino)ethyl]pyridine

CAS: 6304-27-4
Formula: C₉H₁₄N₂
MW: 150.22 g/mol

VQ-021291

Reference Standard

2-[2-(Dipropylamino)ethyl]-6-nitrophenyl Acetic Acid Hydrochloride chemical structure

2-[2-(Dipropylamino)ethyl]-6-nitrophenyl Acetic Acid Hydrochloride

CAS: 91374-25-3
Formula: C₁₆H₂₅ClN₂O₄
MW: 344.8 g/mol

VQ-033641

Reference Standard

2-[2-[[4-[(5S)-5-[[[(5-Chloro-2-thienyl)carbonyl]amino]methyl]-2-oxo-3-oxazolidinyl]phenyl]amino]ethoxy]-acetic Acid Hydrochloride chemical structure

2-[2-[[4-[(5S)-5-[[[(5-Chloro-2-thienyl)carbonyl]amino]methyl]-2-oxo-3-oxazolidinyl]phenyl]amino]ethoxy]-acetic Acid Hydrochloride

CAS: 931117-61-2
Formula: C₁₉H₂₁Cl₂N₃O₆S
MW: 490.4 g/mol

VQ-027846

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