Impurity Reference Standards

API Impurities

Process impurities, isomers, degradants and related compounds for thousands of APIs, characterised for method development, validation and QC release.

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3-(4-(Hexyloxy)-1,2,5-thiadiazol-3-yl)-1-methylpyridin-1-ium Iodide

CAS: 131988-19-7
Formula: C₁₄H₂₀IN₃OS
MW: 405.3 g/mol

ZX-026225

3-(4-(Methylamino)-1-oxoisoindolin-2-yl)piperidine-2,6-dione

CAS: 2197421-58-0
Formula: C₁₄H₁₅N₃O₃
MW: 273.29 g/mol

ZX-030204

3-(4-(Sec-Butoxy)benzyl)-1-(4-fluorobenzyl)-1-(1-methylpiperidin-4-yl)urea

CAS: 2377646-60-9
Formula: C₂₅H₃₄FN₃O₂
MW: 427.6 g/mol

ZX-026405

3-(4-Chlorophenyl)-1-isoindolinone

CAS: 2224-77-3
Formula: C₁₄H₁₀ClNO
MW: 243.69 g/mol

ZX-033189

3-(4-Chlorophenyl)-5-methoxy-5-oxopentanoic Acid

CAS: 5045-65-8
Formula: C₁₂H₁₃ClO₄
MW: 256.68 g/mol

ZX-023484

3-(4-Chlorophenyl)glutaric Anhydride

CAS: 53911-68-5
Formula: C₁₁H₉ClO₃
MW: 224.64 g/mol

ZX-020773

3-(4-Chlorophenyl)pentanediamide

CAS: 1195277-58-7
Formula: C₁₁H₁₃ClN₂O₂
MW: 240.68 g/mol

ZX-023485

3-(4-Chlorophenyl)pentanedioic acid

CAS: 35271-74-0
Formula: C₁₁H₁₁ClO₄
MW: 242.65 g/mol

ZX-020772

3-(4-Chlorophenyl)propyl Mesylate

CAS: 61440-60-6
Formula: C₁₀H₁₃ClO₃S
MW: 248.73 g/mol

ZX-031905

3-(4-Methoxybenzoyl)propionic acid

CAS: 3153-44-4
Formula: C₁₁H₁₂O₄
MW: 208.21 g/mol

ZX-020514

3-(5-Methoxy-2,6-dimethyl-9-oxo-3,4,7,9-tetrahydro-2H-furo[3,4-h]chromen-2-yl)propanoic Acid

CAS: 24243-38-7
Formula: C₁₇H₂₀O₆
MW: 320.3 g/mol

ZX-025734

3-(5-Methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)benzoic Acid

CAS: 641571-18-8
Formula: C₁₂H₉F₃N₂O₂
MW: 270.21 g/mol

ZX-033935

3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonamide

CAS: 386273-25-2
Formula: C₁₆H₁₄N₂O₃S
MW: 314.4 g/mol

ZX-026308

3-(5,5-DiMethyl-2-oxo-1,3,2-dioxaphorinane-2-yl)-4-(3-nitrophenyl)-bu-3-en-2-one

CAS: 111011-78-0
Formula: C₁₅H₁₈NO₆P
MW: 339.28 g/mol

ZX-031074

3-(6-(1-(6-Chloro-5-fluoropyrimidin-4-yl)ethyl)-5-fluoropyrimidin-4-yl)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol

CAS: 321588-94-7
Formula: C₂₂H₁₈ClF₄N₇O
MW: 507.9 g/mol

ZX-027630

3-(6,7-Dibromo-2,3-dihydrobenzofuran-5-yl)propanoic Acid

CAS: 196597-76-9
Formula: C₁₁H₁₀Br₂O₃
MW: 350 g/mol

ZX-032098

3-(6'-Oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzonitrile

CAS: 380918-53-6
Formula: C₂₃H₁₅N₃O
MW: 349.4 g/mol

ZX-026356

3-(7-Cyano-5-(2-nitropropyl)indolin-1-yl)propyl benzoate

CAS: 350797-56-7
Formula: C₂₂H₂₃N₃O₄
MW: 393.4 g/mol

ZX-032476

3-(9H-Carbazol-4-yloxy)-1,2-propanediol

CAS: 123119-89-1
Formula: C₁₅H₁₅NO₃
MW: 257.28 g/mol

ZX-021073

3-(Acetoxymethyl)-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

CAS: 108260-00-0
Formula: C₁₀H₁₂N₂O₅S
MW: 272.28 g/mol

ZX-044825

3-(Aminomethyl)-5-methylhexanamide

CAS: 1026009-73-3
Formula: C₈H₁₈N₂O
MW: 158.24 g/mol

ZX-026525

3-(Aminosulfonyl)-5-(dibutylamino)-4-phenoxybenzoic Acid

CAS: 1236290-34-8
Formula: C₂₁H₂₈N₂O₅S
MW: 420.5 g/mol

ZX-028360

3-(Benzyl(methyl)amino)-1-phenylpropan-1-ol

CAS: 74681-55-3
Formula: C₁₇H₂₁NO
MW: 255.35 g/mol

ZX-029571

3-(Bromomethyl)benzoic Acid

CAS: 6515-58-8
Formula: C₈H₇BrO₂
MW: 215.04 g/mol

ZX-039275

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