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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.

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2,746in stock

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API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

N,N,N,N-Tetrabutylpropane-1,3-diamine chemical structure

N,N,N,N-Tetrabutylpropane-1,3-diamine

CAS: 94107-99-0
Formula: C₁₉H₄₂N₂
MW: 298.6 g/mol

VQ-048105

Reference Standard

N,N,N'-Trimethyl-N'-nitrosopropane-1,3-diamine chemical structure

N,N,N'-Trimethyl-N'-nitrosopropane-1,3-diamine

CAS: 2731010-51-6
Formula: C₆H₁₅N₃O
MW: 145.2 g/mol

VQ-031181

Reference Standard

N,N,O-Tridesmethyl Diltiazem chemical structure

N,N,O-Tridesmethyl Diltiazem

CAS: 159734-23-3
Formula: C₁₉H₂₀N₂O₄S
MW: 372.4 g/mol

VQ-043497

Reference Standard

N,N'-(((8S,8'S)-1,1',6,6',7,7',8,8'-Octahydro-2H,2'H-[4,6'-biindeno[5,4-b]furan]-8,8'-diyl)bis(ethane-2,1-diyl))dipropionamide chemical structure

N,N'-(((8S,8'S)-1,1',6,6',7,7',8,8'-Octahydro-2H,2'H-[4,6'-biindeno[5,4-b]furan]-8,8'-diyl)bis(ethane-2,1-diyl))dipropionamide

CAS: 880152-63-6
Formula: C₃₂H₄₀N₂O₄
MW: 516.7 g/mol

VQ-033442

Reference Standard

N,N'-((Ethane-1,2-diylbis(azanediyl))bis(ethane-2,1-diyl))dibenzamide chemical structure

N,N'-((Ethane-1,2-diylbis(azanediyl))bis(ethane-2,1-diyl))dibenzamide

CAS: 878580-53-1
Formula: C₂₀H₂₆N₄O₂
MW: 354.4 g/mol

VQ-042679

Reference Standard

N,N'-(Ethane-1,2-diyl)bis(N-((R)-1-hydroxybutan-2-yl)nitrous amide) chemical structure

N,N'-(Ethane-1,2-diyl)bis(N-((R)-1-hydroxybutan-2-yl)nitrous amide)

CAS: 52322-22-2
Formula: C₁₀H₂₂N₄O₄
MW: 262.31 g/mol

VQ-037121

Reference Standard

N,N'-(Ethane-1,2-diyl)bis(N-(2-aminoethyl)benzamide) chemical structure

N,N'-(Ethane-1,2-diyl)bis(N-(2-aminoethyl)benzamide)

CAS: 2654771-38-5
Formula: C₂₀H₂₆N₄O₂
MW: 354.4 g/mol

VQ-042680

Reference Standard

N,N'-(Ethane-1,2-diyl)bis(N-benzylnitrous amide) chemical structure

N,N'-(Ethane-1,2-diyl)bis(N-benzylnitrous amide)

CAS: 69239-61-8
Formula: C₁₆H₁₈N₄O₂
MW: 298.34 g/mol

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Reference Standard

N,N'-(Hexane-1,6-diyl)bis(2-hydroxybenzamide) chemical structure

N,N'-(Hexane-1,6-diyl)bis(2-hydroxybenzamide)

CAS: 20073-95-4
Formula: C₂₀H₂₄N₂O₄
MW: 356.4 g/mol

VQ-023731

Reference Standard

N,N'-(Sulfonylbis(4,1-phenylene))bis(hydroxylamine) chemical structure

N,N'-(Sulfonylbis(4,1-phenylene))bis(hydroxylamine)

CAS: 36679-40-0
Formula: C₁₂H₁₂N₂O₄S
MW: 280.3 g/mol

VQ-047938

Reference Standard

N,N'-[1,2-Ethanediylbis[oxymethylene(1,6-dihydro-6-oxo-9H-purine-9,2-diyl)]]bisacetamide chemical structure

N,N'-[1,2-Ethanediylbis[oxymethylene(1,6-dihydro-6-oxo-9H-purine-9,2-diyl)]]bisacetamide

CAS: 1417988-85-2
Formula: C₁₈H₂₀N₁₀O₆
MW: 472.4 g/mol

VQ-024136

Reference Standard

N,N'-[6-(2,3-Dichlorophenyl)-1,2,4-triazine-3,5-diyl]bis[2,3-dichlorobenzamide chemical structure

N,N'-[6-(2,3-Dichlorophenyl)-1,2,4-triazine-3,5-diyl]bis[2,3-dichlorobenzamide

CAS: 1373393-59-9
Formula: C₂₃H₁₁Cl₆N₅O₂
MW: 602.1 g/mol

VQ-022920

Reference Standard

N,N'-Bis(2,3-dihydroxypropyl)-5-[(N-(2-hydroxyethyl)-carbamoyl)methoxy]-2,4,6-triiodoisophthalamide chemical structure

N,N'-Bis(2,3-dihydroxypropyl)-5-[(N-(2-hydroxyethyl)-carbamoyl)methoxy]-2,4,6-triiodoisophthalamide

CAS: 104517-96-6
Formula: C₁₈H₂₄I₃N₃O₉
MW: 807.1 g/mol

VQ-031227

Reference Standard

N,N'-Bis(2,3-Dihydroxypropyl)-5-nitro-1,3-benzenedicarboxamide chemical structure

N,N'-Bis(2,3-Dihydroxypropyl)-5-nitro-1,3-benzenedicarboxamide

CAS: 76820-34-3
Formula: C₁₄H₁₉N₃O₈
MW: 357.32 g/mol

VQ-026174

Reference Standard

N,N'-Bis(2,4-xylyl)formamidine chemical structure

N,N'-Bis(2,4-xylyl)formamidine

CAS: 16596-04-6
Formula: C₁₇H₂₀N₂
MW: 252.35 g/mol

VQ-029123

Reference Standard

N,N'-Bis(3'-methyl-benzyl)-piperazine chemical structure

N,N'-Bis(3'-methyl-benzyl)-piperazine

CAS: 625406-13-5
Formula: C₂₀H₂₆N₂
MW: 294.4 g/mol

VQ-026575

Reference Standard

N,N'-Bis(4-((6,7-dimethoxyquinolin-4-yl)oxy)phenyl)cyclopropane-1,1-dicarboxamide chemical structure

N,N'-Bis(4-((6,7-dimethoxyquinolin-4-yl)oxy)phenyl)cyclopropane-1,1-dicarboxamide

CAS: 2439164-91-5
Formula: C₃₉H₃₄N₄O₈
MW: 686.7 g/mol

VQ-024721

Reference Standard

N,N'-Bis(4-fluorophenyl)cyclopropane-1,1-dicarboxamide chemical structure

N,N'-Bis(4-fluorophenyl)cyclopropane-1,1-dicarboxamide

CAS: 1431468-36-8
Formula: C₁₇H₁₄F₂N₂O₂
MW: 316.3 g/mol

VQ-024723

Reference Standard

N,N'-Bis(4-Pyridyl)urea chemical structure

N,N'-Bis(4-Pyridyl)urea

CAS: 39642-87-0
Formula: C₁₁H₁₀N₄O
MW: 214.22 g/mol

VQ-022303

Reference Standard

N,N'-Desethylene Levofloxacin Hydrochloride chemical structure

N,N'-Desethylene Levofloxacin Hydrochloride

CAS: 1346603-62-0
Formula: C₁₆H₁₉ClFN₃O₄
MW: 371.79 g/mol

VQ-026443

Reference Standard

N,N'-Desethylene Ofloxacin Hydrochloride chemical structure

N,N'-Desethylene Ofloxacin Hydrochloride

CAS: 1797983-25-5
Formula: C₁₆H₁₉ClFN₃O₄
MW: 371.79 g/mol

VQ-045260

Reference Standard

N,N'-Desethylene-N,N'-diformyl Levofloxacin chemical structure

N,N'-Desethylene-N,N'-diformyl Levofloxacin

CAS: 151377-74-1
Formula: C₁₈H₁₈FN₃O₆
MW: 391.3 g/mol

VQ-022971

Reference Standard

N,N'-Dimethylphthalamide chemical structure

N,N'-Dimethylphthalamide

CAS: 19532-98-0
Formula: C₁₀H₁₂N₂O₂
MW: 192.21 g/mol

VQ-023135

Reference Standard

N,N'-Dimethylpiperazine chemical structure

N,N'-Dimethylpiperazine

CAS: 106-58-1
Formula: C₆H₁₄N₂
MW: 114.19 g/mol

VQ-038894

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