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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rac Guaifenesin Cyclic Carbonate

CAS: 2049-21-0
Formula: C₁₁H₁₂O₅
MW: 224.21 g/mol

ZX-030533

rac N-Benzyl Nebivolol

CAS: 929706-85-4
Formula: C₂₉H₃₁F₂NO₄
MW: 495.6 g/mol

ZX-022244

rac N-Propyl-2-cyanimidopyrrolidine-5-acetic Acid

CAS: 1246833-75-9
Formula: C₁₀H₁₅N₃O₂
MW: 209.24 g/mol

ZX-031939

rac Norphenylephrine Hydrochloride

CAS: 4779-94-6
Formula: C₈H₁₂ClNO₂
MW: 189.64 g/mol

ZX-024320

rac Terpinen-4-ol

CAS: 562-74-3
Formula: C₁₀H₁₈O
MW: 154.25 g/mol

ZX-031196

rac threo-Dihydro Bupropion

CAS: 92264-82-9
Formula: C₁₃H₂₀ClNO
MW: 241.76 g/mol

ZX-027738

rac Threo-Dihydro Bupropion Hydrochloride

CAS: 1396889-62-5
Formula: C₁₃H₂₁Cl₂NO
MW: 278.21 g/mol

ZX-036818

rac-11-epi-Misoprostol

CAS: 58717-36-5
Formula: C₂₂H₃₈O₅
MW: 382.5 g/mol

ZX-030663

rac-2,3-Dehydro-3,4-dihydro Ivermectin

CAS: 1135339-49-9
Formula: C₄₈H₇₄O₁₄
MW: 875.1 g/mol

ZX-025214

rac-6-Methyl-4-phenyl-2-chromanol

CAS: 209747-04-6
Formula: C₁₆H₁₆O₂
MW: 240.3 g/mol

ZX-027333

Rac-Anabasine DiHCl

CAS: 143924-48-5
Formula: C₁₀H₁₆Cl₂N₂
MW: 235.15 g/mol

ZX-047854

Rac-Bedaquiline

CAS: 654655-80-8
Formula: C₃₂H₃₁BrN₂O₂
MW: 555.5 g/mol

ZX-023502

Rac-Bifenthrin

CAS: 99267-18-2
Formula: C₂₃H₂₂ClF₃O₂
MW: 422.9 g/mol

ZX-032868

rac-Brivaracetam

CAS: 357335-87-6
Formula: C₁₁H₂₀N₂O₂
MW: 212.29 g/mol

ZX-028336

rac-cis-3-Dechloro Sertraline Hydrochloride

CAS: 79646-00-7
Formula: C₁₇H₁₉Cl₂N
MW: 308.2 g/mol

ZX-026914

rac-Clopidogrel Carboxylic Acid

CAS: 90055-55-3
Formula: C₁₅H₁₄ClNO₂S
MW: 307.8 g/mol

ZX-024036

rac-Clopidogrel Carboxylic Acid Hydrochloride

CAS: 1015247-88-7
Formula: C₁₅H₁₅Cl₂NO₂S
MW: 344.3 g/mol

ZX-028704

rac-Duloxetine Hydrochloride

CAS: 947316-47-4
Formula: C₁₈H₂₀ClNOS
MW: 333.9 g/mol

ZX-024406

rac-Duloxetine Related Compound F

CAS: 1104890-90-5
Formula: C₁₈H₂₀ClNOS
MW: 333.9 g/mol

ZX-029127

rac-Efavirenz

CAS: 177530-93-7
Formula: C₁₄H₉ClF₃NO₂
MW: 315.67 g/mol

ZX-021520

rac-Epinephrine-3-O-sulfate

CAS: 112346-91-5
Formula: C₉H₁₃NO₆S
MW: 263.27 g/mol

ZX-023160

rac-erythro Methylphenidate Hydrochloride (1.0 mg/mL in Methanol)

CAS: 23644-60-2
Formula: C₁₄H₂₀ClNO₂
MW: 269.77 g/mol

ZX-036851

rac-Galanthamine Hydrobromide

CAS: 193146-85-9
Formula: C₁₇H₂₂BrNO₃
MW: 368.3 g/mol

ZX-029690

rac-Mirabegron

CAS: 1330277-46-7
Formula: C₂₁H₂₄N₄O₂S
MW: 396.5 g/mol

ZX-025650

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