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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-(+)-O-Desmethyl Venlafaxine chemical structure

S-(+)-O-Desmethyl Venlafaxine

CAS: 142761-12-4
Formula: C₁₆H₂₅NO₂
MW: 263.37 g/mol

VQ-028667

Reference Standard

S-(5-(Dimethylamino)-2-((4-(dimethyliminio)cyclohexa-2,5-dien-1-ylidene)amino)phenyl)sulfothioate chemical structure

S-(5-(Dimethylamino)-2-((4-(dimethyliminio)cyclohexa-2,5-dien-1-ylidene)amino)phenyl)sulfothioate

CAS: 1698876-57-1
Formula: C₁₆H₁₉N₃O₃S₂
MW: 365.5 g/mol

VQ-031841

Reference Standard

S-(5'-Adenosyl)-L-homocysteine chemical structure

S-(5'-Adenosyl)-L-homocysteine

CAS: 979-92-0
Formula: C₁₄H₂₀N₆O₅S
MW: 384.41 g/mol

VQ-022906

Reference Standard

S-2-Pyridylthio Cysteamine Hydrochloride chemical structure

S-2-Pyridylthio Cysteamine Hydrochloride

CAS: 106139-15-5
Formula: C₇H₁₁ClN₂S₂
MW: 222.8 g/mol

VQ-036481

Reference Standard

S-Acetyl L-Glutathione chemical structure

S-Acetyl L-Glutathione

CAS: 3054-47-5
Formula: C₁₂H₁₉N₃O₇S
MW: 349.36 g/mol

VQ-032385

Reference Standard

S-Acetylcysteine chemical structure

S-Acetylcysteine

CAS: 60333-15-5
Formula: C₅H₉NO₃S
MW: 163.2 g/mol

VQ-029013

Reference Standard

S-Adenosyl-L-Methionine D3 chemical structure

S-Adenosyl-L-Methionine D3

CAS: 68684-40-2
Formula: C₁₅H₂₂N₆O₅S
MW: 401.5 g/mol

VQ-038354

Reference Standard

S-Adenosylmethioninamine chemical structure

S-Adenosylmethioninamine

CAS: 22365-13-5
Formula: C₁₄H₂₃N₆O₃S⁺
MW: 355.44 g/mol

VQ-028796

Reference Standard

S-Amisulpride chemical structure

CAS: 71675-92-8
Formula: C₁₇H₂₇N₃O₄S
MW: 369.5 g/mol

VQ-029118

Reference Standard

S-Amlodipine Besylate chemical structure

S-Amlodipine Besylate

CAS: 150566-71-5
Formula: C₂₆H₃₁ClN₂O₈S
MW: 567.1 g/mol

VQ-029135

Reference Standard

S-Baclofen Hydrochloride chemical structure

S-Baclofen Hydrochloride

CAS: 63701-56-4
Formula: C₁₀H₁₃Cl₂NO₂
MW: 250.12 g/mol

VQ-035907

Reference Standard

S-Carbamoyl-L-cysteine chemical structure

S-Carbamoyl-L-cysteine

CAS: 5745-86-8
Formula: C₄H₈N₂O₃S
MW: 164.19 g/mol

VQ-047317

Reference Standard

S-Clopidogrel N-Methyl Impurity chemical structure

S-Clopidogrel N-Methyl Impurity

CAS: 1346605-15-9
Formula: C₁₆H₁₈ClNO₂S
MW: 323.8 g/mol

VQ-029890

Reference Standard

S-Deoxo Fulvestrant chemical structure

S-Deoxo Fulvestrant

CAS: 153004-31-0
Formula: C₃₂H₄₇F₅O₂S
MW: 590.8 g/mol

VQ-044414

Reference Standard

S-Deoxo-6-oxo Fulvestrant chemical structure

S-Deoxo-6-oxo Fulvestrant

CAS: 1107606-70-1
Formula: C₃₂H₄₅F₅O₃S
MW: 604.8 g/mol

VQ-037454

Reference Standard

S-Deoxo-delta-6, 7-Fulvestrant chemical structure

S-Deoxo-delta-6, 7-Fulvestrant

CAS: 2170200-16-3
Formula: C₃₂H₄₅F₅O₂S
MW: 588.8 g/mol

VQ-030897

Reference Standard

S-Des-ciclesonide chemical structure

S-Des-ciclesonide

CAS: 161115-60-2
Formula: C₂₈H₃₈O₆
MW: 470.6 g/mol

VQ-036291

Reference Standard

S-Desmethyl S-Chloromethyl Dronedarone chemical structure

S-Desmethyl S-Chloromethyl Dronedarone

CAS: 1520080-11-8
Formula: C₃₁H₄₃ClN₂O₅S
MW: 591.2 g/mol

VQ-030317

Reference Standard

S-Despropylamino S-Methyl Macitentan chemical structure

S-Despropylamino S-Methyl Macitentan

CAS: 556796-88-4
Formula: C₁₇H₁₅Br₂N₅O₄S
MW: 545.2 g/mol

VQ-023023

Reference Standard

S-Methyl Fluticasone Furoate chemical structure

S-Methyl Fluticasone Furoate

CAS: 397864-58-3
Formula: C₂₇H₃₀F₂O₆S
MW: 520.6 g/mol

VQ-030838

Reference Standard

S-Methyl Tiopronin chemical structure

S-Methyl Tiopronin

CAS: 87254-91-9
Formula: C₆H₁₁NO₃S
MW: 177.22 g/mol

VQ-034287

Reference Standard

S-Methyl-N,N-Diethyldithiocarbamate chemical structure

S-Methyl-N,N-Diethyldithiocarbamate

CAS: 686-07-7
Formula: C₆H₁₃NS₂
MW: 163.3 g/mol

VQ-025350

Reference Standard

S-Methyl-N,N-diethyldithiocarbamate Sulfoxide chemical structure

S-Methyl-N,N-diethyldithiocarbamate Sulfoxide

CAS: 145195-14-8
Formula: C₆H₁₃NOS₂
MW: 179.3 g/mol

VQ-030238

Reference Standard

S-Methyldihydroziprasidone chemical structure

S-Methyldihydroziprasidone

CAS: 194280-91-6
Formula: C₂₂H₂₅ClN₄OS
MW: 429 g/mol

VQ-044358

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