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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.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

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-[2-(2-Chlorobenzoyl)-4-nitrophenyl]-2-[[[[2-(2-chlorobenzoyl)-4-nitrophenyl]carbamoyl]methyl]amino]acetamide chemical structure

N-[2-(2-Chlorobenzoyl)-4-nitrophenyl]-2-[[[[2-(2-chlorobenzoyl)-4-nitrophenyl]carbamoyl]methyl]amino]acetamide

CAS: 191085-33-3
Formula: C₃₀H₂₁Cl₂N₅O₈
MW: 650.4 g/mol

VQ-044832

Reference Standard

N-[2-(2-Methoxyphenoxy)ethyl]acetamide chemical structure

N-[2-(2-Methoxyphenoxy)ethyl]acetamide

CAS: 293738-17-7
Formula: C₁₁H₁₅NO₃
MW: 209.24 g/mol

VQ-036172

Reference Standard

N-[2-(2-Methoxyphenoxy)ethyl]benzylamine chemical structure

N-[2-(2-Methoxyphenoxy)ethyl]benzylamine

CAS: 3246-03-5
Formula: C₁₆H₁₉NO₂
MW: 257.33 g/mol

VQ-036171

Reference Standard

N-[2-(2,4-Dichlorophenyl)-2-[(2,4-dichlorophenyl)methoxy]ethyl]-formamide chemical structure

N-[2-(2,4-Dichlorophenyl)-2-[(2,4-dichlorophenyl)methoxy]ethyl]-formamide

CAS: 911805-54-4
Formula: C₁₆H₁₃Cl₄NO₂
MW: 393.1 g/mol

VQ-026686

Reference Standard

N-[2-(Methylthio)ethyl]-2-[(3,3,3-trifluoropropyl)thio]-adenosine 2',3',5'-triacetate chemical structure

N-[2-(Methylthio)ethyl]-2-[(3,3,3-trifluoropropyl)thio]-adenosine 2',3',5'-triacetate

CAS: 1830294-26-2
Formula: C₂₂H₂₈F₃N₅O₇S₂
MW: 595.6 g/mol

VQ-036118

Reference Standard

N-[2-[2-Hydroxy-4-(methanesulfonamido)-5-phenoxyphenyl]-2-oxoethyl]formamide chemical structure

N-[2-[2-Hydroxy-4-(methanesulfonamido)-5-phenoxyphenyl]-2-oxoethyl]formamide

CAS: 149457-03-4
Formula: C₁₆H₁₆N₂O₆S
MW: 364.4 g/mol

VQ-031159

Reference Standard

N-[2-[4-(Aminosulfonyl)phenyl]ethyl]-acetamide chemical structure

N-[2-[4-(Aminosulfonyl)phenyl]ethyl]-acetamide

CAS: 41472-49-5
Formula: C₁₀H₁₄N₂O₃S
MW: 242.3 g/mol

VQ-029725

Reference Standard

N-[3-(2-Amino-5-methoxyphenyl]-3-oxopropyl]acetamide chemical structure

N-[3-(2-Amino-5-methoxyphenyl]-3-oxopropyl]acetamide

CAS: 52450-39-2
Formula: C₁₂H₁₆N₂O₃
MW: 236.27 g/mol

VQ-031769

Reference Standard

N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]phenyl]-N-ethylacetamide chemical structure

N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]phenyl]-N-ethylacetamide

CAS: 96605-66-2
Formula: C₁₅H₂₀N₂O₂
MW: 260.33 g/mol

VQ-028770

Reference Standard

N-[3,5-Bis[(diethylamino)methyl]-4-hydroxyphenyl]acetamide chemical structure

N-[3,5-Bis[(diethylamino)methyl]-4-hydroxyphenyl]acetamide

CAS: 81080-09-3
Formula: C₁₈H₃₁N₃O₂
MW: 321.5 g/mol

VQ-020793

Reference Standard

N-[4-(2,3-Dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenylidene]methanamine chemical structure

N-[4-(2,3-Dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenylidene]methanamine

CAS: 340830-05-9
Formula: C₁₇H₁₅Cl₂N
MW: 304.2 g/mol

VQ-033825

Reference Standard

N-[4-(3,4-Dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenylidene]methanamine N-Oxide chemical structure

N-[4-(3,4-Dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenylidene]methanamine N-Oxide

CAS: 209473-00-7
Formula: C₁₇H₁₅Cl₂NO
MW: 320.2 g/mol

VQ-028010

Reference Standard

N-[4-(4-Fluorophenyl)-5-methyl-6-(1-methylethyl)-2-pyrimidinyl]-N-methylmethanesulfonamide chemical structure

N-[4-(4-Fluorophenyl)-5-methyl-6-(1-methylethyl)-2-pyrimidinyl]-N-methylmethanesulfonamide

CAS: 953776-62-0
Formula: C₁₆H₂₀FN₃O₂S
MW: 337.4 g/mol

VQ-033662

Reference Standard

N-[4-(4-Morpholinyl)phenyl]imidodicarbonimidic diamide

N-[4-(4-Morpholinyl)phenyl]imidodicarbonimidic diamide

CAS: 1232144-63-6
Formula: C₁₂H₁₈N₆O
MW: 262.31 g/mol

VQ-031976

Reference Standard

N-[4-[(4-Aminophenyl)sulfonyl]phenyl]formamide chemical structure

N-[4-[(4-Aminophenyl)sulfonyl]phenyl]formamide

CAS: 21501-24-6
Formula: C₁₃H₁₂N₂O₃S
MW: 276.31 g/mol

VQ-025189

Reference Standard

N-[4-[(4-Hydroxyphenyl)amino]phenyl]acetamide chemical structure

N-[4-[(4-Hydroxyphenyl)amino]phenyl]acetamide

CAS: 93629-82-4
Formula: C₁₄H₁₄N₂O₂
MW: 242.27 g/mol

VQ-050038

Reference Standard

N-[4-Amino-2-chloro-6-[(2-deoxy-2-fluoro-beta-D-arabinopyranosyl)amino]-5-pyrimidinyl]-formamide chemical structure

N-[4-Amino-2-chloro-6-[(2-deoxy-2-fluoro-beta-D-arabinopyranosyl)amino]-5-pyrimidinyl]-formamide

CAS: 1140251-33-7
Formula: C₁₀H₁₃ClFN₅O₄
MW: 321.69 g/mol

VQ-022230

Reference Standard

N-[4-Chloro-2-(1-phenylethenyl)phenyl]-N'-ethylurea chemical structure

N-[4-Chloro-2-(1-phenylethenyl)phenyl]-N'-ethylurea

CAS: 1622406-34-1
Formula: C₁₇H₁₇ClN₂O
MW: 300.8 g/mol

VQ-030614

Reference Standard

N-[4-Cyano-3-(trifluoromethyl)phenyl]-2-methyl-2-oxiranecarboxamide chemical structure

N-[4-Cyano-3-(trifluoromethyl)phenyl]-2-methyl-2-oxiranecarboxamide

CAS: 90357-51-0
Formula: C₁₂H₉F₃N₂O₂
MW: 270.21 g/mol

VQ-021825

Reference Standard

N-[4-Methyl-3-(4-pyridin-3-yl-pyrimidin-2-ylamino)-phenyl]-4-chloromethyl Benzamide chemical structure

N-[4-Methyl-3-(4-pyridin-3-yl-pyrimidin-2-ylamino)-phenyl]-4-chloromethyl Benzamide

CAS: 404844-11-7
Formula: C₂₄H₂₀ClN₅O
MW: 429.9 g/mol

VQ-026142

Reference Standard

N-[5-(4-Bromophenyl)-6-chloro-4-pyrimidinyl]-N'-ethylsulfamide chemical structure

N-[5-(4-Bromophenyl)-6-chloro-4-pyrimidinyl]-N'-ethylsulfamide

CAS: 441797-83-7
Formula: C₁₂H₁₂BrClN₄O₂S
MW: 391.67 g/mol

VQ-044782

Reference Standard

N-[5-(4-Bromophenyl)-6-chloro-4-pyrimidinyl]-N'-propylsulfamide chemical structure

N-[5-(4-Bromophenyl)-6-chloro-4-pyrimidinyl]-N'-propylsulfamide

CAS: 1393813-42-7
Formula: C₁₃H₁₄BrClN₄O₂S
MW: 405.7 g/mol

VQ-021265

Reference Standard

N-[5-(Acetylamino)-2-hydroxyphenyl]-N-(4-hydroxyphenyl)acetamide chemical structure

N-[5-(Acetylamino)-2-hydroxyphenyl]-N-(4-hydroxyphenyl)acetamide

CAS: 98966-17-7
Formula: C₁₆H₁₆N₂O₄
MW: 300.31 g/mol

VQ-033060

Reference Standard

N-[6-[2-[(5-Bromo-2-pyrimidinyl)oxy]ethoxy]-5-phenyl-4-pyrimidinyl]-N′-propylsulfamide chemical structure

N-[6-[2-[(5-Bromo-2-pyrimidinyl)oxy]ethoxy]-5-phenyl-4-pyrimidinyl]-N′-propylsulfamide

CAS: 2300968-87-8
Formula: C₁₉H₂₁BrN₆O₄S
MW: 509.4 g/mol

VQ-038240

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