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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

(R)-2-Nitro-6-((4-(trifluoromethoxy)benzyl)oxy)-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine chemical structure

(R)-2-Nitro-6-((4-(trifluoromethoxy)benzyl)oxy)-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine

CAS: 1105708-11-9
Formula: C₁₄H₁₂F₃N₃O₅
MW: 359.26 g/mol

VQ-021322

Reference Standard

(R)-2-Phenylbutyric Acid chemical structure

(R)-2-Phenylbutyric Acid

CAS: 938-79-4
Formula: C₁₀H₁₂O₂
MW: 164.2 g/mol

VQ-029566

Reference Standard

(R)-2,2-Diphenyl-2-(pyrrolidin-3-yl)acetamide 2,3-dihydroxysuccinate chemical structure

(R)-2,2-Diphenyl-2-(pyrrolidin-3-yl)acetamide 2,3-dihydroxysuccinate

CAS: 1092540-94-7
Formula: C₂₂H₂₆N₂O₇
MW: 430.5 g/mol

VQ-030060

Reference Standard

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

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

CAS: 2568065-21-2
Formula: C₁₅H₁₁N₃O₃
MW: 281.27 g/mol

VQ-028575

Reference Standard

(R)-3-((((S)-1-Amino-1-oxobutan-2-yl)amino)methyl)hexanoic Acid chemical structure

(R)-3-((((S)-1-Amino-1-oxobutan-2-yl)amino)methyl)hexanoic Acid

CAS: 2397556-18-0
Formula: C₁₁H₂₂N₂O₃
MW: 230.3 g/mol

VQ-024654

Reference Standard

(R)-3-((((S)-1-Carboxypropyl)amino)methyl)hexanoic acid chemical structure

(R)-3-((((S)-1-Carboxypropyl)amino)methyl)hexanoic acid

CAS: 2451181-70-5
Formula: C₁₁H₂₁NO₄
MW: 231.29 g/mol

VQ-036032

Reference Standard

(R)-3-((1-Methylpyrrolidin-2-yl)methyl)-1,5-bis(2-(phenylsulfonyl)ethyl)-1H-indole chemical structure

(R)-3-((1-Methylpyrrolidin-2-yl)methyl)-1,5-bis(2-(phenylsulfonyl)ethyl)-1H-indole

CAS: 1181222-90-1
Formula: C₂₉H₃₂N₂O₄S₂
MW: 536.7 g/mol

VQ-025505

Reference Standard

(R)-3-((3-Fluoro-4-(6-(2-methyl-2H-tetrazol-5-yl)pyridin-3-yl)phenyl)amino)-2-hydroxypropyl Dihydrogen Phosphate chemical structure

(R)-3-((3-Fluoro-4-(6-(2-methyl-2H-tetrazol-5-yl)pyridin-3-yl)phenyl)amino)-2-hydroxypropyl Dihydrogen Phosphate

CAS: 2095200-69-2
Formula: C₁₆H₁₈FN₆O₅P
MW: 424.32 g/mol

VQ-028218

Reference Standard

(R)-3-((6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile chemical structure

(R)-3-((6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile

CAS: 1339955-49-5
Formula: C₁₈H₂₁N₅O₂
MW: 339.4 g/mol

VQ-021509

Reference Standard

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

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

CAS: 1612153-32-8
Formula: C₂₀H₂₀FNO₄
MW: 357.4 g/mol

VQ-030657

Reference Standard

(R)-3-((tert-Butoxycarbonyl)amino)-2-(4-(((2,4-dimethylbenzoyl)oxy)methyl)phenyl)propanoic Acid chemical structure

(R)-3-((tert-Butoxycarbonyl)amino)-2-(4-(((2,4-dimethylbenzoyl)oxy)methyl)phenyl)propanoic Acid

CAS: 2098444-97-2
Formula: C₂₄H₂₉NO₆
MW: 427.5 g/mol

VQ-045061

Reference Standard

(R)-3-((tert-Butoxycarbonyl)amino)-4-(2,4-difluorophenyl)butanoic Acid chemical structure

(R)-3-((tert-Butoxycarbonyl)amino)-4-(2,4-difluorophenyl)butanoic Acid

CAS: 851307-12-5
Formula: C₁₅H₁₉F₂NO₄
MW: 315.31 g/mol

VQ-023766

Reference Standard

(R)-3-((tert-Butoxycarbonyl)amino)-4-(2,5-difluorophenyl)butanoic Acid chemical structure

(R)-3-((tert-Butoxycarbonyl)amino)-4-(2,5-difluorophenyl)butanoic Acid

CAS: 486459-98-7
Formula: C₁₅H₁₉F₂NO₄
MW: 315.31 g/mol

VQ-033876

Reference Standard

(R)-3-((tert-Butoxycarbonyl)amino)-4-(3,4-difluorophenyl)butanoic Acid chemical structure

(R)-3-((tert-Butoxycarbonyl)amino)-4-(3,4-difluorophenyl)butanoic Acid

CAS: 269396-59-0
Formula: C₁₅H₁₉F₂NO₄
MW: 315.31 g/mol

VQ-042198

Reference Standard

(R)-3-([1,1'-Biphenyl]-4-yl)-2-aminopropan-1-ol chemical structure

(R)-3-([1,1'-Biphenyl]-4-yl)-2-aminopropan-1-ol

CAS: 1426129-52-3
Formula: C₁₅H₁₇NO
MW: 227.3 g/mol

VQ-042070

Reference Standard

(R)-3-([1,1'-Biphenyl]-4-yl)-2-aminopropan-1-ol hydrochloride chemical structure

(R)-3-([1,1'-Biphenyl]-4-yl)-2-aminopropan-1-ol hydrochloride

CAS: 1573000-33-5
Formula: C₁₅H₁₈ClNO
MW: 263.76 g/mol

VQ-042060

Reference Standard

(R)-3-(1-(2-Chloro-3-fluorophenyl)ethoxy)-5-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-amine chemical structure

(R)-3-(1-(2-Chloro-3-fluorophenyl)ethoxy)-5-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-amine

CAS: 1801651-84-2
Formula: C₂₁H₂₃ClFN₅O
MW: 415.9 g/mol

VQ-045008

Reference Standard

(R)-3-(1-(2-Chloro-5-fluorophenyl)ethoxy)-5-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-amine

(R)-3-(1-(2-Chloro-5-fluorophenyl)ethoxy)-5-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-amine

CAS: 1558007-80-9
Formula: C₂₁H₂₃ClFN₅O
MW: 415.89 g/mol

VQ-047877

Reference Standard

(R)-3-(1-(2,6-Dichloro-3-fluorophenyl)ethoxy)-2-nitrosopyridine

(R)-3-(1-(2,6-Dichloro-3-fluorophenyl)ethoxy)-2-nitrosopyridine

CAS: 2509276-77-9
Formula: C₁₃H₉Cl₂FN₂O₂
MW: 315.13 g/mol

VQ-036449

Reference Standard

(R)-3-(1-(2,6-Dichloro-3-fluorophenyl)ethoxy)-5-(1H-pyrazol-4-yl)pyridin-2-amine chemical structure

(R)-3-(1-(2,6-Dichloro-3-fluorophenyl)ethoxy)-5-(1H-pyrazol-4-yl)pyridin-2-amine

CAS: 3026867-46-6
Formula: C₁₆H₁₃Cl₂FN₄O
MW: 367.2 g/mol

VQ-025093

Reference Standard

(R)-3-(2-Chloro-1-hydroxyethyl)phenol chemical structure

(R)-3-(2-Chloro-1-hydroxyethyl)phenol

CAS: 925430-39-3
Formula: C₈H₉ClO₂
MW: 172.61 g/mol

VQ-029039

Reference Standard

(R)-3-(2-Methoxy-2-oxoethyl)-5-methylhexanoic acid chemical structure

(R)-3-(2-Methoxy-2-oxoethyl)-5-methylhexanoic acid

CAS: 156048-92-9
Formula: C₁₀H₁₈O₄
MW: 202.25 g/mol

VQ-041645

Reference Standard

(R)-3-(3-(Difluoromethyl)phenyl)-N-(1-(naphthalen-1-yl)ethyl)propan-1-amine hydrochloride chemical structure

(R)-3-(3-(Difluoromethyl)phenyl)-N-(1-(naphthalen-1-yl)ethyl)propan-1-amine hydrochloride

CAS: 2609807-97-6
Formula: C₂₂H₂₄ClF₂N
MW: 375.9 g/mol

VQ-035122

Reference Standard

(R)-3-(3-(Diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl isobutyrate chemical structure

(R)-3-(3-(Diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl isobutyrate

CAS: 1380491-70-2
Formula: C₂₆H₃₇NO₃
MW: 411.6 g/mol

VQ-037246

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