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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

(3AS,4R,6S,6aR)-6-Aminotetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-ol chemical structure

(3AS,4R,6S,6aR)-6-Aminotetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-ol

CAS: 592533-90-9
Formula: C₈H₁₅NO₃
MW: 173.21 g/mol

VQ-034236

Reference Standard

(3AS,4R,6S,6aR)-Methyl 4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d]isoxazole-6-carboxylate chemical structure

(3AS,4R,6S,6aR)-Methyl 4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d]isoxazole-6-carboxylate

CAS: 383910-25-6
Formula: C₁₈H₃₀N₂O₅
MW: 354.4 g/mol

VQ-043251

Reference Standard

(3AS,4S,6aR)-Tetrahydro-4-methoxyfuro[3,4-b]furan-2(3H)-one chemical structure

(3AS,4S,6aR)-Tetrahydro-4-methoxyfuro[3,4-b]furan-2(3H)-one

CAS: 866594-60-7
Formula: C₇H₁₀O₄
MW: 158.15 g/mol

VQ-030075

Reference Standard

(3AS,4S,6R,6aR)-4-(Iodomethyl)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxole chemical structure

(3AS,4S,6R,6aR)-4-(Iodomethyl)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxole

CAS: 38838-06-1
Formula: C₉H₁₅IO₄
MW: 314.12 g/mol

VQ-042518

Reference Standard

(3AS,4S,6R,6aR)-6-(N-Boc-amino)-3-(1-ethylpropyl)-3a,5,6,6a-tetrahydro-4H-cyclopent[d]isoxazole-4-carboxylic Acid Methyl Ester chemical structure

(3AS,4S,6R,6aR)-6-(N-Boc-amino)-3-(1-ethylpropyl)-3a,5,6,6a-tetrahydro-4H-cyclopent[d]isoxazole-4-carboxylic Acid Methyl Ester

CAS: 383910-22-3
Formula: C₁₈H₃₀N₂O₅
MW: 354.4 g/mol

VQ-033111

Reference Standard

(3AS,6R,7R,7aS)-3a-(Hydroxymethyl)-2,2-dimethyltetrahydro-5H-[1,3]dioxolo[4,5-b]pyran-6,7-diol chemical structure

(3AS,6R,7R,7aS)-3a-(Hydroxymethyl)-2,2-dimethyltetrahydro-5H-[1,3]dioxolo[4,5-b]pyran-6,7-diol

CAS: 58238-46-3
Formula: C₉H₁₆O₆
MW: 220.22 g/mol

VQ-028464

Reference Standard

(3BS,4aR)-3-(trifluoromethyl)-1,3b,4,4a-tetrahydrospiro[cyclopropa[3,4]cyclopenta[1,2-c]pyrazole-5,2'-[1,3]dithiolane]

(3BS,4aR)-3-(trifluoromethyl)-1,3b,4,4a-tetrahydrospiro[cyclopropa[3,4]cyclopenta[1,2-c]pyrazole-5,2'-[1,3]dithiolane]

CAS: 2375020-08-7
Formula: C₁₀H₉F₃N₂S₂
MW: 278.32 g/mol

VQ-037936

Reference Standard

(3E)-1-Acetyl-3-(ethoxyphenylmethylene)-2,3-dihydro-2-oxo-1H-indole-6-carboxylic Acid Methyl Ester chemical structure

(3E)-1-Acetyl-3-(ethoxyphenylmethylene)-2,3-dihydro-2-oxo-1H-indole-6-carboxylic Acid Methyl Ester

CAS: 1168152-06-4
Formula: C₂₁H₁₉NO₅
MW: 365.4 g/mol

VQ-032171

Reference Standard

(3R,3AR,6aS)-Hexahydrofuro[2,3-b]furan-3-yl 4-Nitrophenyl Ester Carbonic Acid chemical structure

(3R,3AR,6aS)-Hexahydrofuro[2,3-b]furan-3-yl 4-Nitrophenyl Ester Carbonic Acid

CAS: 252873-51-1
Formula: C₁₃H₁₃NO₇
MW: 295.24 g/mol

VQ-036575

Reference Standard

(3R,3AR,6S,6aS)-6-(Nitrooxy)hexahydrofuro[3,2-b]furan-3-yl Acetate chemical structure

(3R,3AR,6S,6aS)-6-(Nitrooxy)hexahydrofuro[3,2-b]furan-3-yl Acetate

CAS: 39698-15-2
Formula: C₈H₁₁NO₇
MW: 233.18 g/mol

VQ-044541

Reference Standard

(3R,3AS,6aR)-hexahydrofuro[2,3-b]furan-3-ol chemical structure

(3R,3AS,6aR)-hexahydrofuro[2,3-b]furan-3-ol

CAS: 156928-09-5
Formula: C₆H₁₀O₃
MW: 130.14 g/mol

VQ-030068

Reference Standard

(3R,3AS,6aR)-hexahydrofuro[2,3-b]furan-3-yl 4-nitrophenyl carbonate chemical structure

(3R,3AS,6aR)-hexahydrofuro[2,3-b]furan-3-yl 4-nitrophenyl carbonate

CAS: 192725-55-6
Formula: C₁₃H₁₃NO₇
MW: 295.24 g/mol

VQ-025208

Reference Standard

(3R,3AS,6aS)-6-Oxohexahydrofuro[3,2-b]furan-3-yl Nitrate chemical structure

(3R,3AS,6aS)-6-Oxohexahydrofuro[3,2-b]furan-3-yl Nitrate

CAS: 110627-22-0
Formula: C₆H₇NO₆
MW: 189.12 g/mol

VQ-043502

Reference Standard

(3R,4R,4AS,7R,8S,8aR)-Hexahydro-3-hydroxy-4,7-dimethyl-8-(3-oxobutyl)-1,2-benzodioxin-8a(3H)-carboxaldehyde chemical structure

(3R,4R,4AS,7R,8S,8aR)-Hexahydro-3-hydroxy-4,7-dimethyl-8-(3-oxobutyl)-1,2-benzodioxin-8a(3H)-carboxaldehyde

CAS: 149588-86-3
Formula: C₁₅H₂₄O₅
MW: 284.35 g/mol

VQ-024369

Reference Standard

(3R,4R,5R)-2-(4-Aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-3,4-bis(benzyloxy)-5-((benzyloxy)methyl)tetrahydrofuran-2-carbonitrile chemical structure

(3R,4R,5R)-2-(4-Aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-3,4-bis(benzyloxy)-5-((benzyloxy)methyl)tetrahydrofuran-2-carbonitrile

CAS: 1191237-68-9
Formula: C₃₃H₃₁N₅O₄
MW: 561.6 g/mol

VQ-044585

Reference Standard

(3R,4R,5R)-3-Fluoro-4-hydroxy-5-(hydroxyMethyl)-3-Methyl-dihydrofuran-2(3H)-one chemical structure

(3R,4R,5R)-3-Fluoro-4-hydroxy-5-(hydroxyMethyl)-3-Methyl-dihydrofuran-2(3H)-one

CAS: 879551-04-9
Formula: C₆H₉FO₄
MW: 164.13 g/mol

VQ-042219

Reference Standard

(3R,4R,5R)-3,4-Bis(benzyloxy)-5-((benzyloxy)methyl)dihydrofuran-2(3H)-one chemical structure

(3R,4R,5R)-3,4-Bis(benzyloxy)-5-((benzyloxy)methyl)dihydrofuran-2(3H)-one

CAS: 55094-52-5
Formula: C₂₆H₂₆O₅
MW: 418.5 g/mol

VQ-043774

Reference Standard

(3R,4R,5R)-3,4-Dihydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester chemical structure

(3R,4R,5R)-3,4-Dihydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester

CAS: 220626-12-0
Formula: C₁₀H₁₆O₇S
MW: 280.3 g/mol

VQ-038807

Reference Standard

(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethy chemical structure

(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethy

CAS: 204254-94-4
Formula: C₁₅H₂₆O₇S
MW: 350.4 g/mol

VQ-032303

Reference Standard

(3R,4R,5R)-Oseltamivir chemical structure

(3R,4R,5R)-Oseltamivir

CAS: 1402431-91-7
Formula: C₁₆H₂₈N₂O₄
MW: 312.4 g/mol

VQ-038797

Reference Standard

(3R,4R,5S,6R)-2-(4-Chloro-3-(4-(((S)-tetrahydrofuran-3-yl)oxy)benzyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol chemical structure

(3R,4R,5S,6R)-2-(4-Chloro-3-(4-(((S)-tetrahydrofuran-3-yl)oxy)benzyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol

CAS: 1417573-74-0
Formula: C₂₃H₂₇ClO₇
MW: 450.9 g/mol

VQ-036972

Reference Standard

(3R,4R,5S)-4-(Acetylamino)-5-amino-3-(1-methylethoxy)-1-Cyclohexene-1-carboxylic Acid Ethyl Ester chemical structure

(3R,4R,5S)-4-(Acetylamino)-5-amino-3-(1-methylethoxy)-1-Cyclohexene-1-carboxylic Acid Ethyl Ester

CAS: 1052063-36-1
Formula: C₁₄H₂₄N₂O₄
MW: 284.35 g/mol

VQ-038801

Reference Standard

(3R,4R,5S)-Ethyl 4-acetamido-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate chemical structure

(3R,4R,5S)-Ethyl 4-acetamido-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate

CAS: 651324-09-3
Formula: C₂₂H₃₆N₂O₄
MW: 392.5 g/mol

VQ-038865

Reference Standard

(3R,4R,5S)-Ethyl-4-acetamido-5-(2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate chemical structure

(3R,4R,5S)-Ethyl-4-acetamido-5-(2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate

CAS: 2413185-87-0
Formula: C₂₂H₃₂N₂O₆
MW: 420.5 g/mol

VQ-038796

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