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Impurity Reference Standards

Pharmacopoeial impurities, nitrosamines, metabolites, labelled internal standards and API working standards, each backed by analytical data for method development and QC.

20,060 products6 categories2,050 in stockCOA + SDS with every lot

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(S)-2'-Oxo-1',2',5,7-tetrahydrospiro[cyclopenta[b]pyridine-6,3'-pyrrolo[2,3-b]pyridine]-3-carboxylic Acid

CAS: 1375541-21-1
Formula: C₁₅H₁₁N₃O₃
MW: 281.27 g/mol

ZX-027460

(S)-3-((R)-5-(4-Fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one

CAS: 528565-93-7
Formula: C₂₀H₂₀FNO₄
MW: 357.4 g/mol

ZX-033449

(S)-3-(1-Aminoethyl)-8-chloro-2-phenylisoquinolin-1(2H)-one

CAS: 1350643-72-9
Formula: C₁₇H₁₅ClN₂O
MW: 298.8 g/mol

ZX-036960

(S)-3-(2-(5-Bromo-2-chlorobenzyl)phenoxy)tetrahydrofuran

CAS: 2744280-76-8
Formula: C₁₇H₁₆BrClO₂
MW: 367.7 g/mol

ZX-029237

(S)-3-(2-Bromo-4-nitro-1H-imidazol-1-yl)-2-hydroxypropyl pivalate

CAS: 2755727-09-2
Formula: C₁₁H₁₆BrN₃O₅
MW: 350.17 g/mol

ZX-022570

(S)-3-(2-Methoxy-4-nitro-1H-imidazol-1-yl)-2-((4-(trifluoromethoxy)benzyl)oxy)propan-1-ol

CAS: 2512206-85-6
Formula: C₁₅H₁₆F₃N₃O₆
MW: 391.3 g/mol

ZX-026529

(S)-3-(3-((3-Chloro-2-(3,4-dimethoxyphenyl)propyl)(methyl)amino)propyl)-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one

CAS: 2768438-46-4
Formula: C₂₇H₃₇ClN₂O₅
MW: 505 g/mol

ZX-025208

(S)-3-(4-Bromo-1H-pyrazol-1-yl)-3-cyclopentylpropanenitrile

CAS: 2183286-19-1
Formula: C₁₁H₁₄BrN₃
MW: 268.15 g/mol

ZX-032350

(S)-3-(4,4-Difluorocyclohexane-1-carboxamido)-3-phenylpropanoic Acid

CAS: 948592-18-5
Formula: C₁₆H₁₉F₂NO₃
MW: 311.32 g/mol

ZX-025490

(S)-3-(Aminomethyl)-5-methylhexanamide

CAS: 1568181-40-7
Formula: C₈H₁₈N₂O
MW: 158.24 g/mol

ZX-031983

(S)-3-(Bis(3,3-dimethylbutyl)amino)-4-(((S)-1-methoxy-1-oxo-3-phenylpropan-2-yl)amino)-4-oxobutanoic acid

CAS: 223113-38-0
Formula: C₂₆H₄₂N₂O₅
MW: 462.6 g/mol

ZX-030801

(S)-3-(Boc-amino)piperidine

CAS: 216854-23-8
Formula: C₁₀H₂₀N₂O₂
MW: 200.28 g/mol

ZX-025404

(S)-3-(Dimethylamino)-1-(thiophen-3-yl)propan-1-ol

CAS: 1384080-56-1
Formula: C₉H₁₅NOS
MW: 185.29 g/mol

ZX-029126

(S)-3-Amino-piperidine-2,6-dione hydrochloride

CAS: 25181-50-4
Formula: C₅H₉ClN₂O₂
MW: 164.59 g/mol

ZX-034777

(S)-3-Hydroxypyrrolidine

CAS: 100243-39-8
Formula: C₄H₉NO
MW: 87.12 g/mol

ZX-035167

(S)-3-Methyl Morpholine

CAS: 350595-57-2
Formula: C₅H₁₁NO
MW: 101.15 g/mol

ZX-043557

(S)-3-Methyl-1-((3aS,4S,6S,7aR)-3a,5,5-trimethylhexahydro-4,6-methanobenzo[d][1,3,2]dioxaborol-2-yl)butan-1-amine 2,2,2-trifluoroacetate

CAS: 477254-69-6
Formula: C₁₇H₂₉BF₃NO₄
MW: 379.2 g/mol

ZX-023602

(S)-3-Methyl-5-(5-(3,4,5-trichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)thiophene-2-carboxylic Acid

CAS: 1918956-01-0
Formula: C₁₆H₉Cl₃F₃NO₃S
MW: 458.7 g/mol

ZX-030379

(S)-3-Methylpiperazin-2-one

CAS: 78551-38-9
Formula: C₅H₁₀N₂O
MW: 114.15 g/mol

ZX-031550

(S)-3-tert-Butylamino-1,2-propanediol

CAS: 30315-46-9
Formula: C₇H₁₇NO₂
MW: 147.22 g/mol

ZX-032667

(S)-3,3-Dimethyl-2-(2,2,2-trifluoroacetamido)butanoic acid

CAS: 666832-71-9
Formula: C₈H₁₂F₃NO₃
MW: 227.18 g/mol

ZX-036726

(S)-4-((3-Chloro-4-methoxybenzyl)amino)-2-(2-(hydroxymethyl)pyrrolidin-1-yl)pyrimidine-5-carboxylic Acid

CAS: 330785-84-7
Formula: C₁₈H₂₁ClN₄O₄
MW: 392.8 g/mol

ZX-023435

(S)-4-(1-(2-Aminopropyl)-1H-pyrazol-3-yl)-2-chlorobenzonitrile

CAS: 1297537-41-7
Formula: C₁₃H₁₃ClN₄
MW: 260.72 g/mol

ZX-028861

(S)-4-(3-((Tert-Butoxycarbonyl)amino)-1-(isoquinolin-6-ylamino)-1-oxopropan-2-yl)benzyl 2,4-dimethylbenzoate

CAS: 1253955-19-9
Formula: C₃₃H₃₅N₃O₅
MW: 553.6 g/mol

ZX-022255

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