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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

Tert-Butyl ((2S,3S)-4-chloro-3-hydroxy-1-phenylbutan-2-yl) carbamate chemical structure

Tert-Butyl ((2S,3S)-4-chloro-3-hydroxy-1-phenylbutan-2-yl) carbamate

CAS: 165727-45-7
Formula: C₁₅H₂₂ClNO₃
MW: 299.79 g/mol

VQ-039388

Reference Standard

tert-Butyl ((2S,4R,5R)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate chemical structure

tert-Butyl ((2S,4R,5R)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate

CAS: 1414933-89-3
Formula: C₂₃H₃₂N₂O₃
MW: 384.5 g/mol

VQ-044013

Reference Standard

tert-Butyl ((2S,4R,5S)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate chemical structure

tert-Butyl ((2S,4R,5S)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate

CAS: 1414933-83-7
Formula: C₂₃H₃₂N₂O₃
MW: 384.5 g/mol

VQ-033586

Reference Standard

tert-Butyl ((2S,4S,5R)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate chemical structure

tert-Butyl ((2S,4S,5R)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate

CAS: 1414933-91-7
Formula: C₂₃H₃₂N₂O₃
MW: 384.5 g/mol

VQ-033589

Reference Standard

tert-Butyl ((2S,4S,5S)-5-(2-(2,6-dimethylphenoxy)acetamido)-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate chemical structure

tert-Butyl ((2S,4S,5S)-5-(2-(2,6-dimethylphenoxy)acetamido)-4-hydroxy-1,6-diphenylhexan-2-yl)carbamate

CAS: 192725-45-4
Formula: C₃₃H₄₂N₂O₅
MW: 546.7 g/mol

VQ-048929

Reference Standard

tert-Butyl ((3R,5S,6R)-6-methyl-2-oxo-5-(2,3,6-trifluorophenyl)piperidin-3-yl)carbamate chemical structure

tert-Butyl ((3R,5S,6R)-6-methyl-2-oxo-5-(2,3,6-trifluorophenyl)piperidin-3-yl)carbamate

CAS: 1488327-11-2
Formula: C₁₇H₂₁F₃N₂O₃
MW: 358.35 g/mol

VQ-029245

Reference Standard

tert-Butyl ((3R,5S,6R)-6-methyl-2-oxo-5-phenyl-1-(2,2,2-trifluoroethyl)piperidin-3-yl)carbamate chemical structure

tert-Butyl ((3R,5S,6R)-6-methyl-2-oxo-5-phenyl-1-(2,2,2-trifluoroethyl)piperidin-3-yl)carbamate

CAS: 1456803-36-3
Formula: C₁₉H₂₅F₃N₂O₃
MW: 386.4 g/mol

VQ-044820

Reference Standard

tert-Butyl ((3S,5S,6R)-6-methyl-2-oxo-5-(2,3,6-trifluorophenyl)piperidin-3-yl)carbamate chemical structure

tert-Butyl ((3S,5S,6R)-6-methyl-2-oxo-5-(2,3,6-trifluorophenyl)piperidin-3-yl)carbamate

CAS: 1456803-43-2
Formula: C₁₇H₂₁F₃N₂O₃
MW: 358.35 g/mol

VQ-047459

Reference Standard

tert-Butyl ((3S,5S,6R)-6-methyl-2-oxo-5-phenyl-1-(2,2,2-trifluoroethyl)piperidin-3-yl)carbamate chemical structure

tert-Butyl ((3S,5S,6R)-6-methyl-2-oxo-5-phenyl-1-(2,2,2-trifluoroethyl)piperidin-3-yl)carbamate

CAS: 1456803-35-2
Formula: C₁₉H₂₅F₃N₂O₃
MW: 386.4 g/mol

VQ-044819

Reference Standard

tert-Butyl ((R)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)carbamate chemical structure

tert-Butyl ((R)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)carbamate

CAS: 2177287-68-0
Formula: C₁₄H₂₅NO₄
MW: 271.35 g/mol

VQ-035254

Reference Standard

tert-Butyl ((R)-4-methyl-1-((S)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)carbamate chemical structure

tert-Butyl ((R)-4-methyl-1-((S)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)carbamate

CAS: 2381627-87-6
Formula: C₁₄H₂₅NO₄
MW: 271.35 g/mol

VQ-035256

Reference Standard

tert-Butyl ((S)-1-(((S)-4-methyl-1-(((S)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)amino)-1-oxopentan-2-yl)amino)-1-oxo-4-phenylbutan-2-yl)carbamate chemical structure

tert-Butyl ((S)-1-(((S)-4-methyl-1-(((S)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)amino)-1-oxopentan-2-yl)amino)-1-oxo-4-phenylbutan-2-yl)carbamate

CAS: 868540-22-1
Formula: C₃₉H₅₆N₄O₇
MW: 692.9 g/mol

VQ-024791

Reference Standard

tert-Butyl ((S)-1-(benzyloxy)-3-((S)-3-(hydroxymethyl)morpholino)propan-2-yl)carbamate chemical structure

tert-Butyl ((S)-1-(benzyloxy)-3-((S)-3-(hydroxymethyl)morpholino)propan-2-yl)carbamate

CAS: 1268364-48-2
Formula: C₂₀H₃₂N₂O₅
MW: 380.5 g/mol

VQ-048171

Reference Standard

tert-Butyl ((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)carbamate chemical structure

tert-Butyl ((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)carbamate

CAS: 247068-82-2
Formula: C₁₄H₂₅NO₄
MW: 271.35 g/mol

VQ-024786

Reference Standard

tert-Butyl (1-([1,1'-biphenyl]-4-yl)-3-hydroxypropan-2-yl)carbamate chemical structure

tert-Butyl (1-([1,1'-biphenyl]-4-yl)-3-hydroxypropan-2-yl)carbamate

CAS: 1127490-74-7
Formula: C₂₀H₂₅NO₃
MW: 327.4 g/mol

VQ-042068

Reference Standard

tert-Butyl (1-cyanopent-4-yn-1-yl)carbamate chemical structure

tert-Butyl (1-cyanopent-4-yn-1-yl)carbamate

CAS: 1628836-07-6
Formula: C₁₁H₁₆N₂O₂
MW: 208.26 g/mol

VQ-034595

Reference Standard

tert-Butyl (1-oxo-1-phenylhex-5-yn-2-yl)carbamate chemical structure

tert-Butyl (1-oxo-1-phenylhex-5-yn-2-yl)carbamate

CAS: 1437235-48-7
Formula: C₁₇H₂₁NO₃
MW: 287.35 g/mol

VQ-044473

Reference Standard

tert-Butyl (1R,3R,5R)-3-carbamoyl-2-azabicyclo[3.1.0]hexane-2-carboxylate chemical structure

tert-Butyl (1R,3R,5R)-3-carbamoyl-2-azabicyclo[3.1.0]hexane-2-carboxylate

CAS: 1564266-54-1
Formula: C₁₁H₁₈N₂O₃
MW: 226.27 g/mol

VQ-042112

Reference Standard

tert-Butyl (1R,3S,5R)-3-carbamoyl-2-azabicyclo[3.1.0]hexane-2-carboxylate chemical structure

tert-Butyl (1R,3S,5R)-3-carbamoyl-2-azabicyclo[3.1.0]hexane-2-carboxylate

CAS: 1445592-86-8
Formula: C₁₁H₁₈N₂O₃
MW: 226.27 g/mol

VQ-033782

Reference Standard

tert-Butyl (1S,3R,5S)-3-carbamoyl-2-azabicyclo[3.1.0]hexane-2-carboxylate chemical structure

tert-Butyl (1S,3R,5S)-3-carbamoyl-2-azabicyclo[3.1.0]hexane-2-carboxylate

CAS: 1564266-79-0
Formula: C₁₁H₁₈N₂O₃
MW: 226.27 g/mol

VQ-033787

Reference Standard

Tert-Butyl (2R)-3-cyano-2-methyl-4-oxopiperidine-1-carboxylate chemical structure

Tert-Butyl (2R)-3-cyano-2-methyl-4-oxopiperidine-1-carboxylate

CAS: 3008218-44-5
Formula: C₁₂H₁₈N₂O₃
MW: 238.28 g/mol

VQ-032277

Reference Standard

tert-Butyl (2S,4S)-4-[4-(3-Methyl-1-phenyl-1H-pyrazol-5-yl)piperazin-1-yl]-2-[(1,3-thiazolidin-3-yl)carbonyl]pyrrolidine-1-carboxylate chemical structure

tert-Butyl (2S,4S)-4-[4-(3-Methyl-1-phenyl-1H-pyrazol-5-yl)piperazin-1-yl]-2-[(1,3-thiazolidin-3-yl)carbonyl]pyrrolidine-1-carboxylate

CAS: 401566-80-1
Formula: C₂₇H₃₈N₆O₃S
MW: 526.7 g/mol

VQ-028245

Reference Standard

tert-Butyl (2S)-3-cyano-2-methyl-4-oxopiperidine-1-carboxylate chemical structure

tert-Butyl (2S)-3-cyano-2-methyl-4-oxopiperidine-1-carboxylate

CAS: 2212021-56-0
Formula: C₁₂H₁₈N₂O₃
MW: 238.28 g/mol

VQ-038783

Reference Standard

tert-Butyl (3-bromo-5-chloro-2-fluorophenyl)carbamate chemical structure

tert-Butyl (3-bromo-5-chloro-2-fluorophenyl)carbamate

CAS: 1269232-94-1
Formula: C₁₁H₁₂BrClFNO₂
MW: 324.57 g/mol

VQ-048212

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