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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

4-(tert-Butyl)-N-(6-(2-(2-hydroxyethoxy)ethoxy)-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl)benzenesulfonamide chemical structure

4-(tert-Butyl)-N-(6-(2-(2-hydroxyethoxy)ethoxy)-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl)benzenesulfonamide

CAS: 1257099-43-6
Formula: C₂₉H₃₃N₅O₇S
MW: 595.7 g/mol

VQ-024620

Reference Standard

4-(Thiophen-2-yl)thiazol-2-amine chemical structure

4-(Thiophen-2-yl)thiazol-2-amine

CAS: 28989-50-6
Formula: C₇H₆N₂S₂
MW: 182.3 g/mol

VQ-047493

Reference Standard

4-(Trichloromethyl)benzoic acid chemical structure

4-(Trichloromethyl)benzoic acid

CAS: 5264-40-4
Formula: C₈H₅Cl₃O₂
MW: 239.5 g/mol

VQ-034386

Reference Standard

4-(Trichloromethyl)benzonitrile chemical structure

4-(Trichloromethyl)benzonitrile

CAS: 2179-45-5
Formula: C₈H₄Cl₃N
MW: 220.5 g/mol

VQ-039963

Reference Standard

4-(Trichloromethyl)Benzoyl Chloride chemical structure

4-(Trichloromethyl)Benzoyl Chloride

CAS: 14815-86-2
Formula: C₈H₄Cl₄O
MW: 257.9 g/mol

VQ-044042

Reference Standard

4-(Trifluoromethoxy)aniline chemical structure

4-(Trifluoromethoxy)aniline

CAS: 461-82-5
Formula: C₇H₆F₃NO
MW: 177.12 g/mol

VQ-027822

Reference Standard

4-(Trifluoromethoxy)nitrobenzene chemical structure

4-(Trifluoromethoxy)nitrobenzene

CAS: 713-65-5
Formula: C₇H₄F₃NO₃
MW: 207.11 g/mol

VQ-039941

Reference Standard

4-(Trifluoromethoxy)phenol chemical structure

4-(Trifluoromethoxy)phenol

CAS: 828-27-3
Formula: C₇H₅F₃O₂
MW: 178.11 g/mol

VQ-040506

Reference Standard

4-(Trifluoromethyl)-N-(4-(trifluoromethyl)phenyl)benzamide chemical structure

4-(Trifluoromethyl)-N-(4-(trifluoromethyl)phenyl)benzamide

CAS: 195371-90-5
Formula: C₁₅H₉F₆NO
MW: 333.23 g/mol

VQ-037918

Reference Standard

4-(Trifluoromethyl)nicotinoyl Glycine chemical structure

4-(Trifluoromethyl)nicotinoyl Glycine

CAS: 207502-65-6
Formula: C₉H₇F₃N₂O₃
MW: 248.16 g/mol

VQ-039659

Reference Standard

4-[(1-Oxoheptyl)amino]benzoic acid ethyl ester chemical structure

4-[(1-Oxoheptyl)amino]benzoic acid ethyl ester

CAS: 86927-24-4
Formula: C₁₆H₂₃NO₃
MW: 277.36 g/mol

VQ-043970

Reference Standard

4-[(1R)-2-Amino-1-hydroxyethyl]-3,5-cyclohexadiene-1,2-dione chemical structure

4-[(1R)-2-Amino-1-hydroxyethyl]-3,5-cyclohexadiene-1,2-dione

CAS: 67896-55-3
Formula: C₈H₉NO₃
MW: 167.16 g/mol

VQ-038679

Reference Standard

4-[(2-Butyl-5-formyl-1H-imidazol-1-yl)methyl]benzoic Acid chemical structure

4-[(2-Butyl-5-formyl-1H-imidazol-1-yl)methyl]benzoic Acid

CAS: 152146-59-3
Formula: C₁₆H₁₈N₂O₃
MW: 286.33 g/mol

VQ-022547

Reference Standard

4-[(2-Ethoxybenzoyl)amino]-1-methyl-5-propyl-1H-pyrazole-3-carboxamide chemical structure

4-[(2-Ethoxybenzoyl)amino]-1-methyl-5-propyl-1H-pyrazole-3-carboxamide

CAS: 501120-38-3
Formula: C₁₇H₂₂N₄O₃
MW: 330.4 g/mol

VQ-043166

Reference Standard

4-[(2,4-Dichloro-5-methoxyphenyl)amino]-7-hydroxy-6-methoxy-3-quinolinecarbonitrile chemical structure

4-[(2,4-Dichloro-5-methoxyphenyl)amino]-7-hydroxy-6-methoxy-3-quinolinecarbonitrile

CAS: 1460227-29-5
Formula: C₁₈H₁₃Cl₂N₃O₃
MW: 390.2 g/mol

VQ-029485

Reference Standard

4-[(2,4-Dimethylphenyl)sulfanyl]aniline hydrochloride chemical structure

4-[(2,4-Dimethylphenyl)sulfanyl]aniline hydrochloride

CAS: 1049755-55-6
Formula: C₁₄H₁₆ClNS
MW: 265.8 g/mol

VQ-044809

Reference Standard

4-[(2,6-Dimethyl-3-nitro-4-pyridinyl)amino]benzeneethanol chemical structure

4-[(2,6-Dimethyl-3-nitro-4-pyridinyl)amino]benzeneethanol

CAS: 415908-90-6
Formula: C₁₅H₁₇N₃O₃
MW: 287.31 g/mol

VQ-044768

Reference Standard

4-[(4-Amino-2-ethoxy-5-nitrobenzoyl)amino]-1-piperidinecarboxylic Acid Ethyl Ester chemical structure

4-[(4-Amino-2-ethoxy-5-nitrobenzoyl)amino]-1-piperidinecarboxylic Acid Ethyl Ester

CAS: 952309-99-8
Formula: C₁₇H₂₄N₄O₆
MW: 380.4 g/mol

VQ-043473

Reference Standard

4-[(4-Chloro-2-pyrimidinyl)amino]benzonitrile chemical structure

4-[(4-Chloro-2-pyrimidinyl)amino]benzonitrile

CAS: 244768-32-9
Formula: C₁₁H₇ClN₄
MW: 230.65 g/mol

VQ-021331

Reference Standard

4-[(4-Fluoro-phenyl)-hydroxymethyl]-3-hydroxymethyl-benzonitrile chemical structure

4-[(4-Fluoro-phenyl)-hydroxymethyl]-3-hydroxymethyl-benzonitrile

CAS: 207680-98-6
Formula: C₁₅H₁₂FNO₂
MW: 257.26 g/mol

VQ-043932

Reference Standard

4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride chemical structure

4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride

CAS: 106261-49-8
Formula: C₁₃H₂₀Cl₂N₂O₂
MW: 307.21 g/mol

VQ-022834

Reference Standard

4-[(4-Oxo-1, 4-Dihydropyrimidin-2-yl)amino]-Benzonitrile chemical structure

4-[(4-Oxo-1, 4-Dihydropyrimidin-2-yl)amino]-Benzonitrile

CAS: 189956-45-4
Formula: C₁₁H₈N₄O
MW: 212.21 g/mol

VQ-027817

Reference Standard

4-[(5-Amino-1-methyl-1H-indol-3-yl)methyl]-3-methoxy-N-[(2-methylphenyl)sulfonyl]benzamide chemical structure

4-[(5-Amino-1-methyl-1H-indol-3-yl)methyl]-3-methoxy-N-[(2-methylphenyl)sulfonyl]benzamide

CAS: 219583-10-5
Formula: C₂₅H₂₅N₃O₄S
MW: 463.6 g/mol

VQ-034723

Reference Standard

4-[(5,6,7,8-Tetrahydro-3,5,5,8,8-pentamethyl-2-naphthalenyl)carbonyl]benzoic Acid chemical structure

4-[(5,6,7,8-Tetrahydro-3,5,5,8,8-pentamethyl-2-naphthalenyl)carbonyl]benzoic Acid

CAS: 153559-46-7
Formula: C₂₃H₂₆O₃
MW: 350.4 g/mol

VQ-028815

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