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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

(S)-4-(4-((2,3-Dihydroxypropyl)amino)phenyl)morpholin-3-one chemical structure

(S)-4-(4-((2,3-Dihydroxypropyl)amino)phenyl)morpholin-3-one

CAS: 2733521-54-3
Formula: C₁₃H₁₈N₂O₄
MW: 266.29 g/mol

VQ-041956

Reference Standard

(S)-4-(4-((3-Amino-2-hydroxypropyl)amino)phenyl)morpholin-3-one Dihydrochloride chemical structure

(S)-4-(4-((3-Amino-2-hydroxypropyl)amino)phenyl)morpholin-3-one Dihydrochloride

CAS: 2304439-07-2
Formula: C₁₃H₂₁Cl₂N₃O₃
MW: 338.2 g/mol

VQ-041953

Reference Standard

(S)-4-(4-(5-(Hydroxymethyl)-2-oxooxazolidin-3-yl)phenyl)morpholin-3-one chemical structure

(S)-4-(4-(5-(Hydroxymethyl)-2-oxooxazolidin-3-yl)phenyl)morpholin-3-one

CAS: 2733280-11-8
Formula: C₁₄H₁₆N₂O₅
MW: 292.29 g/mol

VQ-033609

Reference Standard

(S)-4-(4-Cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxylic Acid chemical structure

(S)-4-(4-Cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxylic Acid

CAS: 2640506-74-5
Formula: C₂₁H₂₁N₃O₄
MW: 379.4 g/mol

VQ-025786

Reference Standard

(S)-4-(Dibenzylamino)-3-oxo-5-phenylpentanenitrile chemical structure

(S)-4-(Dibenzylamino)-3-oxo-5-phenylpentanenitrile

CAS: 156732-12-6
Formula: C₂₅H₂₄N₂O
MW: 368.5 g/mol

VQ-048928

Reference Standard

(S)-4-[4-(Oxiranylmethoxy)-1,2,5-thiadiazol-3-yl]morpholine chemical structure

(S)-4-[4-(Oxiranylmethoxy)-1,2,5-thiadiazol-3-yl]morpholine

CAS: 69500-53-4
Formula: C₉H₁₃N₃O₃S
MW: 243.29 g/mol

VQ-034276

Reference Standard

(S)-4-Amino-2-(1-(3-hydroxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)isoindoline-1,3-dione chemical structure

(S)-4-Amino-2-(1-(3-hydroxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)isoindoline-1,3-dione

CAS: 2487573-05-5
Formula: C₁₈H₁₈N₂O₆S
MW: 390.4 g/mol

VQ-035268

Reference Standard

(S)-4-Amino-N-(3-hydroxy-1-phenylpropyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxamide chemical structure

(S)-4-Amino-N-(3-hydroxy-1-phenylpropyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxamide

CAS: 1143532-63-1
Formula: C₂₁H₂₆N₆O₂
MW: 394.5 g/mol

VQ-024755

Reference Standard

(S)-4-Benzyl-2-((R)-1-(3,5-bis(trifluoromethyl)phenyl)ethoxy)morpholin-3-one chemical structure

(S)-4-Benzyl-2-((R)-1-(3,5-bis(trifluoromethyl)phenyl)ethoxy)morpholin-3-one

CAS: 327623-36-9
Formula: C₂₁H₁₉F₆NO₃
MW: 447.4 g/mol

VQ-035310

Reference Standard

(S)-4-Benzyl-2-oxazolidinone chemical structure

(S)-4-Benzyl-2-oxazolidinone

CAS: 90719-32-7
Formula: C₁₀H₁₁NO₂
MW: 177.2 g/mol

VQ-023787

Reference Standard

(S)-4-Chloro-3-(4-((tetrahydrofuran-3-yl)oxy)benzyl)benzoic Acid chemical structure

(S)-4-Chloro-3-(4-((tetrahydrofuran-3-yl)oxy)benzyl)benzoic Acid

CAS: 2452301-37-8
Formula: C₁₈H₁₇ClO₄
MW: 332.8 g/mol

VQ-043499

Reference Standard

(S)-4-Ethyl-4-hydroxy-1,4,7,8-tetrahydro-3H,10H-spiro[pyrano[3,4-f]indolizine-6,2'-[1,3]dioxolane]-3,10-dione chemical structure

(S)-4-Ethyl-4-hydroxy-1,4,7,8-tetrahydro-3H,10H-spiro[pyrano[3,4-f]indolizine-6,2'-[1,3]dioxolane]-3,10-dione

CAS: 110351-93-4
Formula: C₁₅H₁₇NO₆
MW: 307.3 g/mol

VQ-035481

Reference Standard

(S)-4-Hydroxy-2-(3-methoxypropyl)-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazine-6-sulfonamide 1,1-Dioxide chemical structure

(S)-4-Hydroxy-2-(3-methoxypropyl)-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazine-6-sulfonamide 1,1-Dioxide

CAS: 154127-42-1
Formula: C₁₀H₁₆N₂O₆S₃
MW: 356.4 g/mol

VQ-021887

Reference Standard

(S)-4-Hydroxymandelic acid chemical structure

(S)-4-Hydroxymandelic acid

CAS: 13244-75-2
Formula: C₈H₈O₄
MW: 168.15 g/mol

VQ-035817

Reference Standard

(S)-4-Hydroxymethyl Ambrisentan chemical structure

(S)-4-Hydroxymethyl Ambrisentan

CAS: 1106685-66-8
Formula: C₂₂H₂₂N₂O₅
MW: 394.4 g/mol

VQ-024082

Reference Standard

(S)-4-Isobutyl-1-(((2R,3S,4S,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)pyrrolidin-2-one chemical structure

(S)-4-Isobutyl-1-(((2R,3S,4S,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)pyrrolidin-2-one

CAS: 466678-50-2
Formula: C₁₄H₂₅NO₆
MW: 303.35 g/mol

VQ-041648

Reference Standard

(S)-4-Isopropyldihydrofuran-2(3H)-one chemical structure

(S)-4-Isopropyldihydrofuran-2(3H)-one

CAS: 53657-15-1
Formula: C₇H₁₂O₂
MW: 128.17 g/mol

VQ-047627

Reference Standard

(S)-4-Methyl-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanoic Acid chemical structure

(S)-4-Methyl-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanoic Acid

CAS: 1396006-47-5
Formula: C₂₂H₃₃N₃O₅
MW: 419.5 g/mol

VQ-029651

Reference Standard

(S)-4-Methyl-N-((R)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide chemical structure

(S)-4-Methyl-N-((R)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide

CAS: 2049025-49-0
Formula: C₄₀H₅₇N₅O₇
MW: 719.9 g/mol

VQ-022012

Reference Standard

(S)-4-Methyl-N-((S)-1-(((R)-4-methyl-1-((S)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide chemical structure

(S)-4-Methyl-N-((S)-1-(((R)-4-methyl-1-((S)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide

CAS: 2049025-67-2
Formula: C₄₀H₅₇N₅O₇
MW: 719.9 g/mol

VQ-024792

Reference Standard

(S)-4-Methyl-N-((S)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((R)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide chemical structure

(S)-4-Methyl-N-((S)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((R)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide

CAS: 2049025-59-2
Formula: C₄₀H₅₇N₅O₇
MW: 719.9 g/mol

VQ-029652

Reference Standard

(S)-4-Methyl-N-((S)-1-(((S)-4-methyl-1-((S)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide chemical structure

(S)-4-Methyl-N-((S)-1-(((S)-4-methyl-1-((S)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide

CAS: 1672698-88-2
Formula: C₄₀H₅₇N₅O₇
MW: 719.9 g/mol

VQ-024790

Reference Standard

(S)-4-Nitrothalidomide chemical structure

(S)-4-Nitrothalidomide

CAS: 202271-78-1
Formula: C₁₃H₉N₃O₆
MW: 303.23 g/mol

VQ-041550

Reference Standard

(S)-4-Oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid chemical structure

(S)-4-Oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid

CAS: 1190392-22-3
Formula: C₈H₈N₂O₃
MW: 180.16 g/mol

VQ-028685

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