Impurity Reference Standards

Metabolites & Degradation Products

Drug metabolites, N-oxides, sulphoxides and forced-degradation products for stability studies, DMPK work and impurity identification.

2,569 products117 in stockCOA + SDS with every lot

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Ropinirole N-Oxide

CAS: 1076199-41-1
Formula: C₁₆H₂₄N₂O₂
MW: 276.37 g/mol

ZX-026794

Ropivacaine N-Oxide

CAS: 1391053-59-0
Formula: C₁₇H₂₆N₂O₂
MW: 290.4 g/mol

ZX-032292

Rosuvastatin Hydroxymethyl Impurity

CAS: 147118-36-3
Formula: C₁₆H₂₀FN₃O₃S
MW: 353.4 g/mol

ZX-032297

Rosuvastatin N-Desmethyl Impurity

CAS: 2253796-97-1
Formula: C₄₂H₅₀CaF₂N₆O₁₂S₂
MW: 973.1 g/mol

ZX-032316

Roxadustat desmethyl ethyl ester

CAS: 808116-52-1
Formula: C₁₈H₁₅NO₄
MW: 309.3 g/mol

ZX-006342

Roxadustat Desmethyl Impurity

CAS: 708263-68-7
Formula: C₁₈H₁₄N₂O₅
MW: 338.3 g/mol

ZX-026835

Roxithromycin N-oxide

CAS: 1460313-73-8
Formula: C₄₁H₇₆N₂O₁₆
MW: 853 g/mol

ZX-032326

Rupatadine N-Oxide

CAS: 1704730-21-1
Formula: C₂₆H₂₆ClN₃O
MW: 432 g/mol

ZX-026857

Ruxolitinib M18

CAS: 1315607-85-2
Formula: C₁₇H₁₈N₆O
MW: 322.4 g/mol

ZX-032353

Ruxolitinib M18 Metabolite (Diastereomeric Mixture)

CAS: 1092973-95-9
Formula: C₁₇H₁₈N₆O
MW: 322.4 g/mol

ZX-006343

Ruxolitinib M27

CAS: 1809535-63-4
Formula: C₁₇H₁₈N₆O
MW: 322.4 g/mol

ZX-032352

Ruxolitinib Metabolite 1 (Diastereomeric Mixture)

CAS: 1092973-94-8
Formula: C₁₇H₁₈N₆O
MW: 322.4 g/mol

ZX-006344

S-(+)-O-Desmethyl Venlafaxine

CAS: 142761-12-4
Formula: C₁₆H₂₅NO₂
MW: 263.37 g/mol

ZX-027549

S-Desmethyl S-Chloromethyl Dronedarone

CAS: 1520080-11-8
Formula: C₃₁H₄₃ClN₂O₅S
MW: 591.2 g/mol

ZX-029107

S-Methyl-N,N-Diethyldithiocarbamate

CAS: 686-07-7
Formula: C₆H₁₃NS₂
MW: 163.3 g/mol

ZX-024318

S-Methyl-N,N-diethyldithiocarbamate Sulfoxide

CAS: 145195-14-8
Formula: C₆H₁₃NOS₂
MW: 179.3 g/mol

ZX-029030

S-Nimodipine

CAS: 77940-93-3
Formula: C₂₁H₂₆N₂O₇
MW: 418.4 g/mol

ZX-030860

S(+)-Hydroxy Chloroquine

CAS: 137433-24-0
Formula: C₁₈H₂₆ClN₃O
MW: 335.9 g/mol

ZX-029853

Sacubitril Diacid Impurity

CAS: 149709-44-4
Formula: C₂₂H₂₅NO₅
MW: 383.4 g/mol

ZX-006345

Sacubitril Impurity 35

CAS: 1810778-75-6
Formula: C₂₀H₂₅NO₃
MW: 327.4 g/mol

ZX-032370

Safinamide Metabolite NW 1689

CAS: 405-85-6
Formula: C₁₄H₁₁FO₃
MW: 246.23 g/mol

ZX-022727

Salbutamol Head to Tail Dimer Impurity

CAS: 156339-89-8
Formula: C₂₀H₂₇NO₄
MW: 345.4 g/mol

ZX-032377

Salidroside

CAS: 10338-51-9
Formula: C₁₄H₂₀O₇
MW: 300.3 g/mol

ZX-032384

Salvinorin A

CAS: 83729-01-5
Formula: C₂₃H₂₈O₈
MW: 432.5 g/mol

ZX-047694

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