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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

(3S,4R)-Benidipine HCl chemical structure

(3S,4R)-Benidipine HCl

CAS: 119009-45-9
Formula: C₂₈H₃₁N₃O₆
MW: 505.6 g/mol

VQ-028951

Reference Standard

(3S,4R)-Tofacitinib chemical structure

(3S,4R)-Tofacitinib

CAS: 1092578-48-7
Formula: C₁₆H₂₀N₆O
MW: 312.37 g/mol

VQ-028418

Reference Standard

(3S,4S)-3-Ethyl-3-hydroxy-4-((1-methyl-1H-imidazol-5-yl)methyl)dihydrofuran-2(3H)-one

(3S,4S)-3-Ethyl-3-hydroxy-4-((1-methyl-1H-imidazol-5-yl)methyl)dihydrofuran-2(3H)-one

CAS: 936031-06-0
Formula: C₁₁H₁₆N₂O₃
MW: 224.3 g/mol

VQ-033182

Reference Standard

(3S,4S)-3-Hexyl-4-[(2R)-2-hydroxytridecyl]-2-oxetanone chemical structure

(3S,4S)-3-Hexyl-4-[(2R)-2-hydroxytridecyl]-2-oxetanone

CAS: 104872-06-2
Formula: C₂₂H₄₂O₃
MW: 354.6 g/mol

VQ-023343

Reference Standard

(3S,4S)-3-Hydroxy-4-phenylazetidin-2-one chemical structure

(3S,4S)-3-Hydroxy-4-phenylazetidin-2-one

CAS: 146924-92-7
Formula: C₉H₉NO₂
MW: 163.17 g/mol

VQ-035175

Reference Standard

(3S,4S)-4-[(R)-1-Carboxyethyl]-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone chemical structure

(3S,4S)-4-[(R)-1-Carboxyethyl]-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone

CAS: 90776-58-2
Formula: C₁₄H₂₇NO₄Si
MW: 301.45 g/mol

VQ-043698

Reference Standard

(3S,4S)-Tofacitinib chemical structure

(3S,4S)-Tofacitinib

CAS: 1092578-47-6
Formula: C₁₆H₂₀N₆O
MW: 312.37 g/mol

VQ-023910

Reference Standard

(3S,4S)-Tofacitinib Citrate chemical structure

(3S,4S)-Tofacitinib Citrate

CAS: 2174011-55-1
Formula: C₂₂H₂₈N₆O₈
MW: 504.5 g/mol

VQ-023911

Reference Standard

(3S,5R,6R)-Bupropion Impurity chemical structure

(3S,5R,6R)-Bupropion Impurity

CAS: 2133460-43-0
Formula: C₁₂H₁₄ClNO₃S
MW: 287.76 g/mol

VQ-029546

Reference Standard

(3S,5R)-6-Cyano-3,5-dihydroxy-hexanoic Acid tert-Butyl Ester chemical structure

(3S,5R)-6-Cyano-3,5-dihydroxy-hexanoic Acid tert-Butyl Ester

CAS: 186508-94-1
Formula: C₁₁H₁₉NO₄
MW: 229.27 g/mol

VQ-035837

Reference Standard

(3S,5R)-Atorvastatin Calcium chemical structure

(3S,5R)-Atorvastatin Calcium

CAS: 887196-25-0
Formula: C₆₆H₆₈CaF₂N₄O₁₀
MW: 1155.3 g/mol

VQ-021658

Reference Standard

(3S,5R)-Atorvastatin Methyl Ester chemical structure

(3S,5R)-Atorvastatin Methyl Ester

CAS: 1429437-85-3
Formula: C₃₄H₃₇FN₂O₅
MW: 572.7 g/mol

VQ-024402

Reference Standard

(3S,5R)-Fluvastatin D6 Sodium chemical structure

(3S,5R)-Fluvastatin D6 Sodium

CAS: 2249799-35-5
Formula: C₂₄H₂₅FNNaO₄
MW: 439.5 g/mol

VQ-037388

Reference Standard

(3S,5R)-Fluvastatin Sodium Salt chemical structure

(3S,5R)-Fluvastatin Sodium Salt

CAS: 94061-81-1
Formula: C₂₄H₂₅FNNaO₄
MW: 433.4 g/mol

VQ-030851

Reference Standard

(3S,5R)-Pitavastatin Calcium chemical structure

(3S,5R)-Pitavastatin Calcium

CAS: 254452-88-5
Formula: C₅₀H₄₆CaF₂N₂O₈
MW: 881 g/mol

VQ-027535

Reference Standard

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

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

CAS: 1375794-72-1
Formula: C₁₄H₁₄F₆N₂O
MW: 340.26 g/mol

VQ-024392

Reference Standard

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

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

CAS: 1375794-69-6
Formula: C₁₄H₁₇F₃N₂O
MW: 286.29 g/mol

VQ-045119

Reference Standard

(3S,5S,6S)-Bupropion Impurity chemical structure

(3S,5S,6S)-Bupropion Impurity

CAS: 2133460-42-9
Formula: C₁₂H₁₄ClNO₃S
MW: 287.76 g/mol

VQ-029545

Reference Standard

(3S,5S)-6-Cyano-3,5-dihydroxyhexanoic Acid 1,1-Dimethylethyl Ester chemical structure

(3S,5S)-6-Cyano-3,5-dihydroxyhexanoic Acid 1,1-Dimethylethyl Ester

CAS: 1105067-92-2
Formula: C₁₁H₁₉NO₄
MW: 229.27 g/mol

VQ-047472

Reference Standard

(3S,5S)-Atorvastatin Acetonide tert-Butyl Ester chemical structure

(3S,5S)-Atorvastatin Acetonide tert-Butyl Ester

CAS: 472967-95-6
Formula: C₄₀H₄₇FN₂O₅
MW: 654.8 g/mol

VQ-021670

Reference Standard

(3S,5S)-Atorvastatin Sodium chemical structure

(3S,5S)-Atorvastatin Sodium

CAS: 1428118-38-0
Formula: C₃₃H₃₄FN₂NaO₅
MW: 580.6 g/mol

VQ-024404

Reference Standard

(3S,5S)-Dihydroxy Simvastatin chemical structure

(3S,5S)-Dihydroxy Simvastatin

CAS: 159143-77-8
Formula: C₂₅H₄₀O₇
MW: 452.6 g/mol

VQ-028043

Reference Standard

(3S,5S)-Pitavastatin Calcium chemical structure

(3S,5S)-Pitavastatin Calcium

CAS: 254452-92-1
Formula: C₅₀H₄₆CaF₂N₂O₈
MW: 881 g/mol

VQ-027537

Reference Standard

(3S,5S)-Rosuvastatin chemical structure

(3S,5S)-Rosuvastatin

CAS: 1584149-34-7
Formula: C₂₂H₂₈FN₃O₆S
MW: 481.5 g/mol

VQ-043528

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