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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

N-(4-Chloro-2-(1,4-dihydroxybutyl)phenyl)-2-methyl-4-(2-methylbenzamido)benzamide chemical structure

N-(4-Chloro-2-(1,4-dihydroxybutyl)phenyl)-2-methyl-4-(2-methylbenzamido)benzamide

CAS: 1587638-01-4
Formula: C₂₆H₂₇ClN₂O₄
MW: 467 g/mol

VQ-034348

Reference Standard

N-(4-Chloro-2-(2-chlorobenzoyl)phenyl)-2-iodoacetamide chemical structure

N-(4-Chloro-2-(2-chlorobenzoyl)phenyl)-2-iodoacetamide

CAS: 152453-65-1
Formula: C₁₅H₁₀Cl₂INO₂
MW: 434.1 g/mol

VQ-029912

Reference Standard

N-(4-Chloro-3-(pyridin-2-yl)phenyl)-4-(methylsulfonyl)benzamide chemical structure

N-(4-Chloro-3-(pyridin-2-yl)phenyl)-4-(methylsulfonyl)benzamide

CAS: 1195072-86-6
Formula: C₁₉H₁₅ClN₂O₃S
MW: 386.9 g/mol

VQ-024097

Reference Standard

N-(4-Chloro-3-fluorophenyl)-7-fluoro-6-nitroquinazolin-4-amine chemical structure

N-(4-Chloro-3-fluorophenyl)-7-fluoro-6-nitroquinazolin-4-amine

CAS: 2475095-50-0
Formula: C₁₄H₇ClF₂N₄O₂
MW: 336.68 g/mol

VQ-024157

Reference Standard

N-(4-Chloro-3-fluorophenyl)-7-fluoro-8-nitroquinazolin-4-amine

N-(4-Chloro-3-fluorophenyl)-7-fluoro-8-nitroquinazolin-4-amine

CAS: 2475094-96-1
Formula: C₁₄H₇ClF₂N₄O₂
MW: 336.68 g/mol

VQ-035252

Reference Standard

N-(4-Chloro-3-methoxyphenyl)-2-cyanoacetamide chemical structure

N-(4-Chloro-3-methoxyphenyl)-2-cyanoacetamide

CAS: 879644-03-8
Formula: C₁₀H₉ClN₂O₂
MW: 224.64 g/mol

VQ-029489

Reference Standard

N-(4-Chloro-3-methoxyphenyl)acetamide chemical structure

N-(4-Chloro-3-methoxyphenyl)acetamide

CAS: 98446-55-0
Formula: C₉H₁₀ClNO₂
MW: 199.63 g/mol

VQ-040057

Reference Standard

N-(4-Chloro-3-sulfamoylbenzoyl)-2-methylindoline chemical structure

N-(4-Chloro-3-sulfamoylbenzoyl)-2-methylindoline

CAS: 2457316-06-0
Formula: C₁₆H₁₅ClN₂O₃S
MW: 350.8 g/mol

VQ-026163

Reference Standard

N-(4-Chlorobenzoyl)-L-glutamic acid chemical structure

N-(4-Chlorobenzoyl)-L-glutamic acid

CAS: 57444-70-9
Formula: C₁₂H₁₂ClNO₅
MW: 285.68 g/mol

VQ-031827

Reference Standard

N-(4-Chlorobutyl)-5-cyanoindole chemical structure

N-(4-Chlorobutyl)-5-cyanoindole

CAS: 1877901-11-5
Formula: C₁₃H₁₃ClN₂
MW: 232.71 g/mol

VQ-042887

Reference Standard

N-(4-Chloropyrimidin-2-yl)-2,3-dimethyl-2H-indazol-6-amine chemical structure

N-(4-Chloropyrimidin-2-yl)-2,3-dimethyl-2H-indazol-6-amine

CAS: 1226499-97-3
Formula: C₁₃H₁₂ClN₅
MW: 273.72 g/mol

VQ-041364

Reference Standard

N-(4-Cyano-3-(trifluoromethyl)phenyl)-2,3-dihydroxy-2-methylpropanamide chemical structure

N-(4-Cyano-3-(trifluoromethyl)phenyl)-2,3-dihydroxy-2-methylpropanamide

CAS: 316373-92-9
Formula: C₁₂H₁₁F₃N₂O₃
MW: 288.22 g/mol

VQ-029432

Reference Standard

N-(4-Cyano-3-(trifluoromethyl)phenyl)methacrylamide chemical structure

N-(4-Cyano-3-(trifluoromethyl)phenyl)methacrylamide

CAS: 90357-53-2
Formula: C₁₂H₉F₃N₂O
MW: 254.21 g/mol

VQ-023366

Reference Standard

N-(4-Cyanophenyl)-2-((4-cyanophenyl)amino)acetamide chemical structure

N-(4-Cyanophenyl)-2-((4-cyanophenyl)amino)acetamide

CAS: 1900865-84-0
Formula: C₁₆H₁₂N₄O
MW: 276.29 g/mol

VQ-029986

Reference Standard

N-(4-Ethylphenyl)-2,3,5,6-tetrafluorobenzenamine chemical structure

N-(4-Ethylphenyl)-2,3,5,6-tetrafluorobenzenamine

CAS: 332903-60-3
Formula: C₁₄H₁₁F₄N
MW: 269.24 g/mol

VQ-027870

Reference Standard

N-(4-Ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-amine chemical structure

N-(4-Ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-amine

CAS: 1029721-32-1
Formula: C₂₂H₂₃N₃O₄
MW: 393.4 g/mol

VQ-037052

Reference Standard

N-(4-Fluorobenzyl)-1-Methylpiperidin-4-Amine chemical structure

N-(4-Fluorobenzyl)-1-Methylpiperidin-4-Amine

CAS: 359878-47-0
Formula: C₁₃H₁₉FN₂
MW: 222.3 g/mol

VQ-027495

Reference Standard

N-(4-Fluorophenyl)-7-methoxy-6-(3-morpholinopropoxy)quinazolin-4-amine

N-(4-Fluorophenyl)-7-methoxy-6-(3-morpholinopropoxy)quinazolin-4-amine

CAS: 2254241-82-0
Formula: C₂₂H₂₅FN₄O₃
MW: 412.5 g/mol

VQ-043185

Reference Standard

N-(4-Formyl-3-methoxyphenyl)acetamide chemical structure

N-(4-Formyl-3-methoxyphenyl)acetamide

CAS: 1134-65-2
Formula: C₁₀H₁₁NO₃
MW: 193.2 g/mol

VQ-040018

Reference Standard

N-(4-Methoxy Phenyl) Piperazine) chemical structure

N-(4-Methoxy Phenyl) Piperazine)

CAS: 38212-30-5
Formula: C₁₁H₁₆N₂O
MW: 192.26 g/mol

VQ-044795

Reference Standard

N-(4-Methoxybenzyl)-N'-methyl-N-2-pyridinyl-1,2-ethanediamine chemical structure

N-(4-Methoxybenzyl)-N'-methyl-N-2-pyridinyl-1,2-ethanediamine

CAS: 104499-47-0
Formula: C₁₆H₂₁N₃O
MW: 271.36 g/mol

VQ-043721

Reference Standard

N-(4-Nitrobenzoyl)-beta-alanine chemical structure

N-(4-Nitrobenzoyl)-beta-alanine

CAS: 59642-21-6
Formula: C₁₀H₁₀N₂O₅
MW: 238.2 g/mol

VQ-027279

Reference Standard

N-(4-Nitrophenethyl)-2-phenylacetamide chemical structure

N-(4-Nitrophenethyl)-2-phenylacetamide

CAS: 83303-98-4
Formula: C₁₆H₁₆N₂O₃
MW: 284.31 g/mol

VQ-043227

Reference Standard

N-(4-Pyridinylmethylene)ethanamine chemical structure

N-(4-Pyridinylmethylene)ethanamine

CAS: 54433-74-8
Formula: C₈H₁₀N₂
MW: 134.18 g/mol

VQ-040349

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