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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

1,4-Bis(3-chlorophenyl)-piperazine chemical structure

1,4-Bis(3-chlorophenyl)-piperazine

CAS: 79975-63-6
Formula: C₁₆H₁₆Cl₂N₂
MW: 307.2 g/mol

VQ-034403

Reference Standard

1,4-Bis(4-(Benzo[b]thiophen-4-yl)piperazin-1-yl)butane chemical structure

1,4-Bis(4-(Benzo[b]thiophen-4-yl)piperazin-1-yl)butane

CAS: 2250242-22-7
Formula: C₂₈H₃₄N₄S₂
MW: 490.7 g/mol

VQ-024634

Reference Standard

1,4-Bis(Benzo[d][1,3]dioxol-5-ylmethyl)piperazine chemical structure

1,4-Bis(Benzo[d][1,3]dioxol-5-ylmethyl)piperazine

CAS: 55436-41-4
Formula: C₂₀H₂₂N₂O₄
MW: 354.4 g/mol

VQ-035290

Reference Standard

1,4-Bis(chloromethyl)naphthalene chemical structure

1,4-Bis(chloromethyl)naphthalene

CAS: 6586-89-6
Formula: C₁₂H₁₀Cl₂
MW: 225.11 g/mol

VQ-032893

Reference Standard

1,4-Bis[3,4-dihydro-2(1H)-quinolinon-7-oxy]butane chemical structure

1,4-Bis[3,4-dihydro-2(1H)-quinolinon-7-oxy]butane

CAS: 882880-12-8
Formula: C₂₂H₂₄N₂O₄
MW: 380.4 g/mol

VQ-020671

Reference Standard

1,4-Butanediol bis(1,2-propane diol) ether chemical structure

1,4-Butanediol bis(1,2-propane diol) ether

CAS: 45176-21-4
Formula: C₁₀H₂₂O₆
MW: 238.28 g/mol

VQ-031012

Reference Standard

1,4-Di-2-furoyl-piperazine chemical structure

1,4-Di-2-furoyl-piperazine

CAS: 31350-27-3
Formula: C₁₄H₁₄N₂O₄
MW: 274.27 g/mol

VQ-023862

Reference Standard

1,4-Di-tert-butylpiperazine-1,4-dicarboxylate chemical structure

1,4-Di-tert-butylpiperazine-1,4-dicarboxylate

CAS: 76535-75-6
Formula: C₁₄H₂₆N₂O₄
MW: 286.37 g/mol

VQ-032620

Reference Standard

1,4-Di(pyridin-2-yl)piperazine chemical structure

1,4-Di(pyridin-2-yl)piperazine

CAS: 64728-49-0
Formula: C₁₄H₁₆N₄
MW: 240.3 g/mol

VQ-033216

Reference Standard

1,4-Dibromo-2-(4-ethoxybenzyl)benzene chemical structure

1,4-Dibromo-2-(4-ethoxybenzyl)benzene

CAS: 1807632-93-4
Formula: C₁₅H₁₄Br₂O
MW: 370.08 g/mol

VQ-022307

Reference Standard

1,4-Dibutoxybenzene chemical structure

1,4-Dibutoxybenzene

CAS: 104-36-9
Formula: C₁₄H₂₂O₂
MW: 222.32 g/mol

VQ-041589

Reference Standard

1,4-Dicyclohexylpiperazine chemical structure

1,4-Dicyclohexylpiperazine

CAS: 19982-04-8
Formula: C₁₆H₃₀N₂
MW: 250.42 g/mol

VQ-047495

Reference Standard

1,4-Dihydro-1,3,5-triazine chemical structure

1,4-Dihydro-1,3,5-triazine

CAS: 45427-50-7
Formula: C₃H₅N₃
MW: 83.09 g/mol

VQ-040150

Reference Standard

1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid 3-Methyl Ester chemical structure

1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid 3-Methyl Ester

CAS: 74936-72-4
Formula: C₁₆H₁₆N₂O₆
MW: 332.31 g/mol

VQ-024502

Reference Standard

1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic acid methyl 2-methylamino 1,1-dimethylethyl Ester chemical structure

1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic acid methyl 2-methylamino 1,1-dimethylethyl Ester

CAS: 887769-40-6
Formula: C₂₁H₂₇N₃O₆
MW: 417.5 g/mol

VQ-028833

Reference Standard

1,4-Dihydro-3-nitro-4-oxoimidazo[5,1-c][1,2,4]triazine-8-carboxamide chemical structure

1,4-Dihydro-3-nitro-4-oxoimidazo[5,1-c][1,2,4]triazine-8-carboxamide

CAS: 287964-59-4
Formula: C₆H₄N₆O₄
MW: 224.13 g/mol

VQ-034089

Reference Standard

1,4-Dimethoxy-3,5-dimethylpyridin-1-ium methyl sulfate chemical structure

1,4-Dimethoxy-3,5-dimethylpyridin-1-ium methyl sulfate

CAS: 2572712-50-4
Formula: C₁₀H₁₇NO₆S
MW: 279.31 g/mol

VQ-030563

Reference Standard

1,4-Dimethoxybutane chemical structure

1,4-Dimethoxybutane

CAS: 13179-96-9
Formula: C₆H₁₄O₂
MW: 118.17 g/mol

VQ-045365

Reference Standard

1,4-Dimethyl Adamantane chemical structure

1,4-Dimethyl Adamantane

CAS: 16267-35-9
Formula: C₁₂H₂₀
MW: 164.29 g/mol

VQ-031781

Reference Standard

1,4-Dimethyl-2-phenylpiperazine chemical structure

1,4-Dimethyl-2-phenylpiperazine

CAS: 5271-29-4
Formula: C₁₂H₁₈N₂
MW: 190.28 g/mol

VQ-031952

Reference Standard

1,4-Dimethylnaphthalene chemical structure

1,4-Dimethylnaphthalene

CAS: 571-58-4
Formula: C₁₂H₁₂
MW: 156.22 g/mol

VQ-041005

Reference Standard

1,4-Dinitroso-1,4-diazepane chemical structure

1,4-Dinitroso-1,4-diazepane

CAS: 55557-00-1
Formula: C₅H₁₀N₄O₂
MW: 158.16 g/mol

VQ-044901

Reference Standard

1,4-dinitrosopiperazine chemical structure

1,4-dinitrosopiperazine

CAS: 140-79-4
Formula: C₄H₈N₄O₂
MW: 144.13 g/mol

In stock

Reference Standard

1,4-Dinitrosopiperazine-d8 chemical structure

1,4-Dinitrosopiperazine-d8

CAS: 69340-07-4
Formula: C₄H₈N₄O₂
MW: 152.18 g/mol

VQ-040577

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