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-Difluoro-2-((phenylthio)methyl)benzoic Acid

CAS: 2136287-65-3
Formula: C₁₄H₁₀F₂O₂S
MW: 280.29 g/mol

ZX-023097

3,4-Difluorophenylacetic acid

CAS: 658-93-5
Formula: C₈H₆F₂O₂
MW: 172.13 g/mol

ZX-026226

3,4-Dihydro-2H-benzo[e][1,2,4]thiadiazine-7-sulfonamide 1,1-dioxide

CAS: 23141-82-4
Formula: C₇H₉N₃O₄S₂
MW: 263.3 g/mol

ZX-025012

3,4-Dihydro-3-Oxo-2-Pyrazinecarboxamide

CAS: 55321-99-8
Formula: C₅H₅N₃O₂
MW: 139.11 g/mol

ZX-021660

3,4-Dihydro-4-phenyl-2H-benzo[h]chromene

CAS: 94305-25-6
Formula: C₁₉H₁₆O
MW: 260.3 g/mol

ZX-028833

3,4-Dihydroagomelatine

CAS: 1352139-51-5
Formula: C₁₅H₁₉NO₂
MW: 245.32 g/mol

ZX-020510

3,4-Dihydrocarbostyril

CAS: 553-03-7
Formula: C₉H₉NO
MW: 147.17 g/mol

ZX-040318

3,4-Dihydroxyphenyl-acetaldehyde

CAS: 5707-55-1
Formula: C₈H₈O₃
MW: 152.15 g/mol

ZX-024344

3,4-Dihydroxyphenyl-glycolaldehyde

CAS: 13023-73-9
Formula: C₈H₈O₄
MW: 168.15 g/mol

ZX-024394

3,4-Dimethoxy-2-pyridinemethanol

CAS: 72830-08-1
Formula: C₈H₁₁NO₃
MW: 169.18 g/mol

ZX-031725

3,4-Dimethoxybenzoyl Chloride

CAS: 3535-37-3
Formula: C₉H₉ClO₃
MW: 200.62 g/mol

ZX-043040

3,4-Dimethoxyphenylacetone

CAS: 776-99-8
Formula: C₁₁H₁₄O₃
MW: 194.23 g/mol

ZX-030551

3,4-Dimethyl-2,6-dinitro-phenylamine

CAS: 40318-31-8
Formula: C₈H₉N₃O₄
MW: 211.17 g/mol

ZX-031017

3,4-Dimethylcyclopent-3-enecarboxylic acid

CAS: 768-38-7
Formula: C₈H₁₂O₂
MW: 140.18 g/mol

ZX-036756

3,4-Dimethylthiophenol

CAS: 18800-53-8
Formula: C₈H₁₀S
MW: 138.23 g/mol

ZX-032774

3,4-Dinitrobenzoic Acid

CAS: 528-45-0
Formula: C₇H₄N₂O₆
MW: 212.12 g/mol

ZX-035006

3,4-O-Isopropylidene Clindamycin

CAS: 147650-54-2
Formula: C₂₁H₃₇ClN₂O₅S
MW: 465 g/mol

ZX-021250

3,4-O-Isopropylideneepilincomycin

CAS: 17017-21-9
Formula: C₂₁H₃₈N₂O₆S
MW: 446.6 g/mol

ZX-028667

3,4-O,O-Dimethyl Carbidopa

CAS: 28860-96-0
Formula: C₁₂H₁₈N₂O₄
MW: 254.28 g/mol

ZX-028458

3,4,5-Trihydroxyphenylalanine

CAS: 16032-83-0
Formula: C₉H₁₁NO₅
MW: 213.19 g/mol

ZX-031827

3,4,5-Trimethoxy-N-(4-methoxybenzyl)benzamide

CAS: 346704-37-8
Formula: C₁₈H₂₁NO₅
MW: 331.4 g/mol

ZX-032901

3,4,5-Trimethyl-2-pyridinemethanol

CAS: 848696-99-1
Formula: C₉H₁₃NO
MW: 151.21 g/mol

ZX-025937

3,5-Anhydrothymidine

CAS: 38313-48-3
Formula: C₁₀H₁₂N₂O₄
MW: 224.21 g/mol

ZX-031188

3,5-Bis(bromomethyl)toluene

CAS: 19294-04-3
Formula: C₉H₁₀Br₂
MW: 277.98 g/mol

ZX-020648

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