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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

(3R,4R)-3-4-Dimethyl-4-(3-hydroxyphenyl) Piperidine chemical structure

(3R,4R)-3-4-Dimethyl-4-(3-hydroxyphenyl) Piperidine

CAS: 119193-19-0
Formula: C₁₃H₁₉NO
MW: 205.3 g/mol

VQ-021525

Reference Standard

(3R,4R)-3-Hexyl-4-((S)-2-hydroxytridecyl)oxetan-2-one chemical structure

(3R,4R)-3-Hexyl-4-((S)-2-hydroxytridecyl)oxetan-2-one

CAS: 210543-56-9
Formula: C₂₂H₄₂O₃
MW: 354.6 g/mol

VQ-049335

Reference Standard

(3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidine-1-carbaldehyde chemical structure

(3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidine-1-carbaldehyde

CAS: 2227199-28-0
Formula: C₁₄H₁₉N₅O
MW: 273.33 g/mol

VQ-043917

Reference Standard

(3R,4R)-N-Methyl Paroxol chemical structure

(3R,4R)-N-Methyl Paroxol

CAS: 100332-12-5
Formula: C₁₃H₁₈FNO
MW: 223.29 g/mol

VQ-043250

Reference Standard

(3R,4R)-N,4-Dimethyl-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidin-3-amine chemical structure

(3R,4R)-N,4-Dimethyl-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidin-3-amine

CAS: 2097982-05-1
Formula: C₁₃H₁₉N₅
MW: 245.32 g/mol

VQ-044085

Reference Standard

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

(3R,4S,5R)-Ethyl 5-azido-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate

CAS: 204254-98-8
Formula: C₁₄H₂₃N₃O₄
MW: 297.35 g/mol

VQ-032302

Reference Standard

(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-14-Ethyl-4,6,12,13-tetrahydroxy-7-methoxy-3,5,7,9,11,13-hexamethyloxacyclotetradecane-2,10-dione chemical structure

(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-14-Ethyl-4,6,12,13-tetrahydroxy-7-methoxy-3,5,7,9,11,13-hexamethyloxacyclotetradecane-2,10-dione

CAS: 2376120-29-3
Formula: C₂₂H₄₀O₈
MW: 432.5 g/mol

VQ-036354

Reference Standard

(3R,4S,5S,6R,7R,9R,11S,12R,13S,14R,E)-6-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-10-(((2-ethoxypropan-2-yl)oxy)imino)-14-ethyl-7,12,13-trihydroxy-4-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,7,9,11,13-hexamethy chemical structure

(3R,4S,5S,6R,7R,9R,11S,12R,13S,14R,E)-6-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-10-(((2-ethoxypropan-2-yl)oxy)imino)-14-ethyl-7,12,13-trihydroxy-4-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,7,9,11,13-hexamethy

CAS: 119665-77-9
Formula: C₄₂H₇₈N₂O₁₄
MW: 835.1 g/mol

VQ-043572

Reference Standard

(3R,4S,5S,6R,7R,9R,11S,12R,13S,14R,E)-6-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-14-ethyl-7,12,13-trihydroxy-4-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3-(hydroxymethyl)-10-(((2-methoxyethoxy)methoxy)imino)-5,7,9 chemical structure

(3R,4S,5S,6R,7R,9R,11S,12R,13S,14R,E)-6-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-14-ethyl-7,12,13-trihydroxy-4-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3-(hydroxymethyl)-10-(((2-methoxyethoxy)methoxy)imino)-5,7,9

CAS: 1460313-65-8
Formula: C₄₁H₇₆N₂O₁₆
MW: 853 g/mol

VQ-044949

Reference Standard

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

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

CAS: 915095-96-4
Formula: C₂₄H₂₉ClO₈
MW: 480.9 g/mol

VQ-030452

Reference Standard

(3R,4S,5S,6R)-6-((((2S,3R,4S,5S,6R)-2-(4-Chloro-3-(4-ethoxybenzyl)phenyl)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)methyl)-3,4,5-trihydroxytetrahydro-2H-pyran-2-one chemical structure

(3R,4S,5S,6R)-6-((((2S,3R,4S,5S,6R)-2-(4-Chloro-3-(4-ethoxybenzyl)phenyl)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)methyl)-3,4,5-trihydroxytetrahydro-2H-pyran-2-one

CAS: 2452300-92-2
Formula: C₂₇H₃₃ClO₁₂
MW: 585 g/mol

VQ-030019

Reference Standard

(3R,4S,6R)-6-Methoxytetrahydro-2H-pyran-3,4-diyl bis(4-methylbenzoate) chemical structure

(3R,4S,6R)-6-Methoxytetrahydro-2H-pyran-3,4-diyl bis(4-methylbenzoate)

CAS: 78185-67-8
Formula: C₂₂H₂₄O₆
MW: 384.4 g/mol

VQ-044073

Reference Standard

(3R,4S)-1-((Benzyloxy)carbonyl)-4-ethylpyrrolidine-3-carboxylic acid chemical structure

(3R,4S)-1-((Benzyloxy)carbonyl)-4-ethylpyrrolidine-3-carboxylic acid

CAS: 1428243-24-6
Formula: C₁₅H₁₉NO₄
MW: 277.31 g/mol

VQ-034489

Reference Standard

(3R,4S)-1-(4-Fluorophenyl)-2-oxo-4-[4-(benzyloxy)phenyl]-3-azetidinepropanoic acid chemical structure

(3R,4S)-1-(4-Fluorophenyl)-2-oxo-4-[4-(benzyloxy)phenyl]-3-azetidinepropanoic acid

CAS: 204589-82-2
Formula: C₂₅H₂₂FNO₄
MW: 419.4 g/mol

VQ-022628

Reference Standard

(3R,4S)-1-(4-Fluorophenyl)-4-(4-hydroxyphenyl)-3-(3-oxo-3-phenylpropyl)azetidin-2-one chemical structure

(3R,4S)-1-(4-Fluorophenyl)-4-(4-hydroxyphenyl)-3-(3-oxo-3-phenylpropyl)azetidin-2-one

CAS: 163222-31-9
Formula: C₂₄H₂₀FNO₃
MW: 389.4 g/mol

VQ-030654

Reference Standard

(3R,4S)-1-Benzyl-N,4-dimethylpiperidin-3-amine chemical structure

(3R,4S)-1-Benzyl-N,4-dimethylpiperidin-3-amine

CAS: 1638499-31-6
Formula: C₁₄H₂₂N₂
MW: 218.34 g/mol

VQ-043682

Reference Standard

(3R,4S)-3-((2-Methoxypropan-2-yl)oxy)-4-phenylazetidin-2-one chemical structure

(3R,4S)-3-((2-Methoxypropan-2-yl)oxy)-4-phenylazetidin-2-one

CAS: 160535-69-3
Formula: C₁₃H₁₇NO₃
MW: 235.28 g/mol

VQ-043949

Reference Standard

(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester chemical structure

(3R,4S)-3-(2-Bromoacetyl)-4-ethyl-1-pyrrolidinecarboxylic acid phenylmethyl ester

CAS: 1428243-26-8
Formula: C₁₆H₂₀BrNO₃
MW: 354.24 g/mol

VQ-028581

Reference Standard

(3R,4S)-3-Hydroxy-4-phenyl-2-azetidinone chemical structure

(3R,4S)-3-Hydroxy-4-phenyl-2-azetidinone

CAS: 132127-34-5
Formula: C₉H₉NO₂
MW: 163.17 g/mol

VQ-048052

Reference Standard

(3R,4S)-3-Methyl-4-phenyl-1-tosylpiperidine-4-carboxylic Acid chemical structure

(3R,4S)-3-Methyl-4-phenyl-1-tosylpiperidine-4-carboxylic Acid

CAS: 83863-68-7
Formula: C₂₀H₂₃NO₄S
MW: 373.5 g/mol

VQ-040550

Reference Standard

(3R,4S)-4-(4-(Benzyloxy)phenyl)-1-(4-fluorophenyl)-3-(3-(4-fluorophenyl)-3-oxopropyl)azetidin-2-one chemical structure

(3R,4S)-4-(4-(Benzyloxy)phenyl)-1-(4-fluorophenyl)-3-(3-(4-fluorophenyl)-3-oxopropyl)azetidin-2-one

CAS: 190595-65-4
Formula: C₃₁H₂₅F₂NO₃
MW: 497.5 g/mol

VQ-022621

Reference Standard

(3R,4S)-Tofacitinib chemical structure

(3R,4S)-Tofacitinib

CAS: 1092578-46-5
Formula: C₁₆H₂₀N₆O
MW: 312.37 g/mol

VQ-028419

Reference Standard

(3R,4S)-Tofacitinib citirate

(3R,4S)-Tofacitinib citirate

CAS: 2174011-53-9
Formula: C₁₆H₂₀N₆O : C₆H₈O₇
MW: 504.5 g/mol

VQ-028428

Reference Standard

(3R,5R,6S)-3-Amino-6-methyl-1-(2,2,2-trifluoroethyl)-5-(2,3,6-trifluorophenyl)piperidin-2-one chemical structure

(3R,5R,6S)-3-Amino-6-methyl-1-(2,2,2-trifluoroethyl)-5-(2,3,6-trifluorophenyl)piperidin-2-one

CAS: 3003751-92-3
Formula: C₁₄H₁₄F₆N₂O
MW: 340.26 g/mol

VQ-029244

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