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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(4S,4AS,5aR,12aS)-4,7-Bis(dimethylamino)-3,10,12,12a-tetrahydroxy-9-((neopentylamino)methyl)-1,11-dioxo-1,4,4a,5,5a,6,11,11a,12,12a-decahydrotetracene-2-carboxamide

CAS: 2272886-40-3
Formula: C₂₉H₄₂N₄O₇
MW: 558.7 g/mol

ZX-025934

(4S,5R)--4-Methyl-5-phenyl-2-oxazolidinone

CAS: 16251-45-9
Formula: C₁₀H₁₁NO₂
MW: 177.2 g/mol

ZX-029430

(4S,5R)-2-(4-Methoxy-phenyl)-3-N-BOC-4-phenyl-3, 5-oxazolidine carboxylic acid

CAS: 196404-55-4
Formula: C₂₂H₂₅NO₆
MW: 399.4 g/mol

ZX-028394

(4S,5R)-5-((R,E)-Hex-4-en-2-yl)-3-methyl-2-oxo-N-((4S,7S,10R,13S,16S,19S,22S,28S)-4,7,16,22-tetraisobutyl-19-isopropyl-5,8,10,13,17,23,26-heptamethyl-3,6,9,12,15,18,21,24,27-nonaoxo-2,5,8,11,14,17,20,23,26-nonaazatriacontan-28-yl)oxazolidine-4-carboxamide

CAS: 1907654-63-0
Formula: C₅₈H₁₀₃N₁₁O₁₂
MW: 1146.5 g/mol

ZX-024099

(4S,5R)-Ethyl 5-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-4-methyl-1,3,2-dioxathiolane-4-carboxylate 2,2-dioxide

CAS: 879551-01-6
Formula: C₁₁H₁₈O₈S
MW: 310.32 g/mol

ZX-032532

(4S,5S)-2,2-Dimethyl-4-phenyl-3,5-oxazolidinedicarboxylic Acid 3-(1,1-Dimethylethyl) Ester

CAS: 153744-63-9
Formula: C₁₇H₂₃NO₅
MW: 321.4 g/mol

ZX-029039

(4S,5S)-3-Benzoyl-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic acid

CAS: 949459-76-1
Formula: C₂₄H₂₁NO₅
MW: 403.4 g/mol

ZX-023698

(4S,6S)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester

CAS: 196085-85-5
Formula: C₁₄H₂₃NO₄
MW: 269.34 g/mol

ZX-019915

(4S,Trans)-1,1-Dimethylethyl-6-aminoethyl-2,2-dimethyl-1,3-dioxane-4-acetate

CAS: 1105067-89-7
Formula: C₁₄H₂₇NO₄
MW: 273.37 g/mol

ZX-028108

(4S)-2-((2-Ethoxy-1-naphthamido)methyl)-5,5-dimethylthiazolidine-4-carboxylic Acid

CAS: 940306-33-2
Formula: C₂₀H₂₄N₂O₄S
MW: 388.5 g/mol

ZX-030749

(4S)-4-(Chloromethyl)-2,2-dimethyl-1,3-dioxolane

CAS: 60456-22-6
Formula: C₆H₁₁ClO₂
MW: 150.6 g/mol

ZX-035445

(4S)-4-Amino-2,6-dimethyl-1-hepten-3-one 2,2,2-Trifluoroacetate

CAS: 1619233-32-7
Formula: C₁₁H₁₈F₃NO₃
MW: 269.26 g/mol

ZX-028468

(4S)-4-Propyloxolan-2-one

CAS: 63095-60-3
Formula: C₇H₁₂O₂
MW: 128.17 g/mol

ZX-026394

(5-(2-Fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)methanol

CAS: 2169271-28-5
Formula: C₁₆H₁₃FN₂O₃S
MW: 332.4 g/mol

ZX-023038

(5-(2-Fluorophenyl)-1H-pyrrol-3-yl)methanol

CAS: 881674-58-4
Formula: C₁₁H₁₀FNO
MW: 191.2 g/mol

ZX-027613

(5-(4-Fluorophenyl)thiophen-2-yl)(5-iodo-2-methylphenyl)methanol

CAS: 1818268-45-9
Formula: C₁₈H₁₄FIOS
MW: 424.3 g/mol

ZX-028419

(5-(tert-Butyl)-2-methoxyphenyl)methanol

CAS: 160744-54-7
Formula: C₁₂H₁₈O₂
MW: 194.27 g/mol

ZX-025493

(5-Amino-2-butyl-3-benzofuranyl)[4-[3-(dibutylamino)propoxy]phenyl]methanone

CAS: 141644-91-9
Formula: C₃₀H₄₂N₂O₃
MW: 478.7 g/mol

ZX-029106

(5-Bromo-2-chlorophenyl)(4- ethoxyphenyl)methanol

CAS: 1280647-32-6
Formula: C₁₅H₁₄BrClO₂
MW: 341.62 g/mol

ZX-024141

(5-Bromo-2-chlorophenyl)(4-fluorophenyl)methanol

CAS: 1280718-70-8
Formula: C₁₃H₉BrClFO
MW: 315.56 g/mol

ZX-029243

(5-Chloropyrazin-2-yl)methanamine

CAS: 1060814-53-0
Formula: C₅H₆ClN₃
MW: 143.57 g/mol

ZX-023130

(5-Ethyl-1H-imidazol-4-yl)methanol hydrochloride

CAS: 38603-74-6
Formula: C₆H₁₁ClN₂O
MW: 162.62 g/mol

ZX-020216

(5-Fluoro-2-methylphenyl)boronic Acid

CAS: 163517-62-2
Formula: C₇H₈BFO₂
MW: 153.95 g/mol

ZX-032611

(5-Methyl-2-oxo-1,3-dioxol-4-yl)methyl 2-ethoxy-1-((2'-(5-ethoxy-1,2,4-oxadiazol-3-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-benzo[d]imidazole-7-carboxylate

CAS: 2741865-60-9
Formula: C₃₂H₂₈N₄O₈
MW: 596.6 g/mol

ZX-028180

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