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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

OMJ2 dehydro Impurity chemical structure

OMJ2 dehydro Impurity

CAS: 1227626-51-8
Formula: C₄₈H₄₂N₆O₅
MW: 782.9 g/mol

VQ-032241

Reference Standard

Ondansetron chemical structure

CAS: 99614-02-5
Formula: C₁₈H₁₉N₃O
MW: 293.4 g/mol

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Reference Standard

Ondansetron EP Impurity A chemical structure

Ondansetron EP Impurity A

CAS: 153139-56-1
Formula: C₁₆H₂₀N₂O
MW: 256.34 g/mol

VQ-032268

Reference Standard

Ondansetron EP Impurity B chemical structure

Ondansetron EP Impurity B

CAS: 1076198-52-1
Formula: C₃₇H₃₈N₆O₂
MW: 598.7 g/mol

VQ-032269

Reference Standard

Ondansetron EP Impurity C chemical structure

Ondansetron EP Impurity C

CAS: 27387-31-1
Formula: C₁₃H₁₃NO
MW: 199.25 g/mol

VQ-027018

Reference Standard

Ondansetron EP Impurity D chemical structure

Ondansetron EP Impurity D

CAS: 99614-64-9
Formula: C₁₄H₁₃NO
MW: 211.26 g/mol

VQ-027019

Reference Standard

Ondansetron EP Impurity G chemical structure

Ondansetron EP Impurity G

CAS: 99614-03-6
Formula: C₁₇H₁₇N₃O
MW: 279.34 g/mol

VQ-027020

Reference Standard

Ondansetron EP Impurity H chemical structure

Ondansetron EP Impurity H

CAS: 99614-14-9
Formula: C₁₇H₁₇N₃O
MW: 279.34 g/mol

VQ-027021

Reference Standard

Ondansetron Hydrochloride chemical structure

Ondansetron Hydrochloride

CAS: 99614-01-4
Formula: C₁₈H₂₀ClN₃O
MW: 329.8 g/mol

VQ-038773

Reference Standard

Ondansetron Hydrochloride Dihydrate EP Impurity H (Maleate Salt)

Ondansetron Hydrochloride Dihydrate EP Impurity H (Maleate Salt)

CAS: 99614-15-0
Formula: C₁₇H₁₇N₃O : C₄H₄O₄
MW: 395.42 g/mol

VQ-032270

Reference Standard

Ondansetron USP Related Compound A chemical structure

Ondansetron USP Related Compound A

CAS: 119812-29-2
Formula: C₁₆H₂₁ClN₂O
MW: 292.8 g/mol

VQ-027017

Reference Standard

Ondansetron-d3 chemical structure

CAS: 1132757-82-4
Formula: C₁₈H₁₉N₃O
MW: 296.4 g/mol

VQ-038776

Reference Standard

Ondansetron-D5 chemical structure

CAS: 1219798-86-3
Formula: C₁₈H₁₉N₃O
MW: 298.4 g/mol

VQ-038775

Reference Standard

Oospoglycol chemical structure

CAS: 33547-50-1
Formula: C₁₁H₁₀O₅
MW: 222.19 g/mol

VQ-040912

Reference Standard

Open Ring Aztreonam chemical structure

Open Ring Aztreonam

CAS: 87500-74-1
Formula: C₁₃H₁₉N₅O₉S₂
MW: 453.5 g/mol

VQ-023396

Reference Standard

Open Ring Metabolite Meropenem chemical structure

Open Ring Metabolite Meropenem

CAS: 124190-28-9
Formula: C₁₇H₂₇N₃O₆S
MW: 401.5 g/mol

VQ-044283

Reference Standard

Open-Ring Desulfated Aztreonam chemical structure

Open-Ring Desulfated Aztreonam

CAS: 102586-36-7
Formula: C₁₃H₁₉N₅O₆S
MW: 373.39 g/mol

VQ-027233

Reference Standard

Opicapone chemical structure

CAS: 923287-50-7
Formula: C₁₅H₁₀Cl₂N₄O₆
MW: 413.2 g/mol

VQ-027023

Reference Standard

Opicapone 3-O-Glucuronide chemical structure

Opicapone 3-O-Glucuronide

CAS: 1428009-74-8
Formula: C₂₁H₁₈Cl₂N₄O₁₂
MW: 589.3 g/mol

VQ-038779

Reference Standard

Opicapone Impurity 11 chemical structure

Opicapone Impurity 11

CAS: 874518-62-4
Formula: C₁₀H₁₀O₅
MW: 210.18 g/mol

VQ-049326

Reference Standard

Opicapone sulfate metabolite chemical structure

Opicapone sulfate metabolite

CAS: 1428009-72-6
Formula: C₁₅H₁₀Cl₂N₄O₉S
MW: 493.2 g/mol

VQ-045110

Reference Standard

Opipramol chemical structure

CAS: 315-72-0
Formula: C₂₃H₂₉N₃O
MW: 363.5 g/mol

VQ-045173

Reference Standard

Opipramol Dihydrochloride chemical structure

Opipramol Dihydrochloride

CAS: 909-39-7
Formula: C₂₃H₃₁Cl₂N₃O
MW: 436.4 g/mol

VQ-038780

Reference Standard

Opipramol Dihydrochloride Allyl Impurity

Opipramol Dihydrochloride Allyl Impurity

CAS: 74074-19-4
Formula: C₁₇H₁₅N
MW: 233.3 g/mol

VQ-049328

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