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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

2-[(2S)-2-Benzyl-3-(methanesulfonyloxy) propanamido]acetic Acid chemical structure

2-[(2S)-2-Benzyl-3-(methanesulfonyloxy) propanamido]acetic Acid

CAS: 1852472-89-9
Formula: C₁₃H₁₇NO₆S
MW: 315.34 g/mol

VQ-024222

Reference Standard

2-[(2S)-2,3-Dihydroxypropyl]-1H-isoindole-1,3(2H)-dione chemical structure

2-[(2S)-2,3-Dihydroxypropyl]-1H-isoindole-1,3(2H)-dione

CAS: 119835-88-0
Formula: C₁₁H₁₁NO₄
MW: 221.21 g/mol

VQ-033604

Reference Standard

2-[(3-Chlorobenzoyl)amino]acetic acid chemical structure

2-[(3-Chlorobenzoyl)amino]acetic acid

CAS: 57728-59-3
Formula: C₉H₈ClNO₃
MW: 213.62 g/mol

VQ-026058

Reference Standard

2-[(3-Cyanophenyl)amino]acetic Acid chemical structure

2-[(3-Cyanophenyl)amino]acetic Acid

CAS: 91192-27-7
Formula: C₉H₈N₂O₂
MW: 176.17 g/mol

VQ-036504

Reference Standard

2-[(3,3,3-Trifluoropropyl)thio]-adenosine chemical structure

2-[(3,3,3-Trifluoropropyl)thio]-adenosine

CAS: 163706-51-2
Formula: C₁₃H₁₆F₃N₅O₄S
MW: 395.36 g/mol

VQ-021974

Reference Standard

2-[(3,4-Dichlorophenyl)-cyanomethylene]-hydrazine Carboximidamide

2-[(3,4-Dichlorophenyl)-cyanomethylene]-hydrazine Carboximidamide

CAS: 356757-50-1
Formula: C₉H₇Cl₂N₅
MW: 256.09 g/mol

VQ-026349

Reference Standard

2-[(3,5-Dimethylphenoxy)methyl]oxirane chemical structure

2-[(3,5-Dimethylphenoxy)methyl]oxirane

CAS: 4287-30-3
Formula: C₁₁H₁₄O₂
MW: 178.23 g/mol

VQ-038337

Reference Standard

2-[(4-Aminophenyl)thio]benzonitrile chemical structure

2-[(4-Aminophenyl)thio]benzonitrile

CAS: 1250596-32-7
Formula: C₁₃H₁₀N₂S
MW: 226.3 g/mol

VQ-041794

Reference Standard

2-[(4-Bromo-2-ethylbenzyl)oxy]tetrahydro-2H-pyran chemical structure

2-[(4-Bromo-2-ethylbenzyl)oxy]tetrahydro-2H-pyran

CAS: 1589558-70-2
Formula: C₁₄H₁₉BrO₂
MW: 299.2 g/mol

VQ-033865

Reference Standard

2-[(4-Carboxymethylphenoxy)methyl]benzoic acid chemical structure

2-[(4-Carboxymethylphenoxy)methyl]benzoic acid

CAS: 55453-89-9
Formula: C₁₆H₁₄O₅
MW: 286.28 g/mol

VQ-044963

Reference Standard

2-[(4-Chlorobenzoyl)amino]acetic acid chemical structure

2-[(4-Chlorobenzoyl)amino]acetic acid

CAS: 13450-77-6
Formula: C₉H₈ClNO₃
MW: 213.62 g/mol

VQ-026057

Reference Standard

2-[(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine chemical structure

2-[(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine

CAS: 122368-54-1
Formula: C₁₇H₁₉ClN₂O
MW: 302.8 g/mol

VQ-028920

Reference Standard

2-[(4-Chlorophenyl)methoxy]-N,N-dimethyl-ethanamine Hydrochloride chemical structure

2-[(4-Chlorophenyl)methoxy]-N,N-dimethyl-ethanamine Hydrochloride

CAS: 1135085-85-6
Formula: C₁₁H₁₇Cl₂NO
MW: 250.16 g/mol

VQ-043340

Reference Standard

2-[(5-Bromo-2-methylphenyl)methyl]-5-(4-fluorophenyl)-thiophene chemical structure

2-[(5-Bromo-2-methylphenyl)methyl]-5-(4-fluorophenyl)-thiophene

CAS: 1030825-20-7
Formula: C₁₈H₁₄BrFS
MW: 361.3 g/mol

VQ-021053

Reference Standard

2-[(5-Chloro-2,1,3-benzothiadiazol-4-yl)amino]-3,5-dihydro-4H-imidazol-4-one chemical structure

2-[(5-Chloro-2,1,3-benzothiadiazol-4-yl)amino]-3,5-dihydro-4H-imidazol-4-one

CAS: 125292-32-2
Formula: C₉H₆ClN₅OS
MW: 267.7 g/mol

VQ-028412

Reference Standard

2-[(8S)-2,6,7,8-Tetrahydro-1H-cyclopenta[e][1]benzofuran-8-yl]ethanamine Hydrochloride chemical structure

2-[(8S)-2,6,7,8-Tetrahydro-1H-cyclopenta[e][1]benzofuran-8-yl]ethanamine Hydrochloride

CAS: 196597-80-5
Formula: C₁₃H₁₈ClNO
MW: 239.74 g/mol

VQ-033435

Reference Standard

2-[(Diphenylmethyl)thio]acetamide chemical structure

2-[(Diphenylmethyl)thio]acetamide

CAS: 68524-30-1
Formula: C₁₅H₁₅NOS
MW: 257.4 g/mol

VQ-028864

Reference Standard

2-[(Diphenylmethyl)thio]acetic Acid chemical structure

2-[(Diphenylmethyl)thio]acetic Acid

CAS: 63547-22-8
Formula: C₁₅H₁₄O₂S
MW: 258.3 g/mol

VQ-028811

Reference Standard

2-[(E)-2,6-Dichlorophenylimino]-1-(1-{2-[(E)-2,6-dichlorophenylimino]-imidazolidin-1-yl}-ethyl)-imidazolidine chemical structure

2-[(E)-2,6-Dichlorophenylimino]-1-(1-{2-[(E)-2,6-dichlorophenylimino]-imidazolidin-1-yl}-ethyl)-imidazolidine

CAS: 2519452-56-1
Formula: C₂₀H₂₀Cl₄N₆
MW: 486.2 g/mol

VQ-025055

Reference Standard

2-[(Ethylamino)methyl]-4-nitrophenol chemical structure

2-[(Ethylamino)methyl]-4-nitrophenol

CAS: 71130-60-4
Formula: C₉H₁₂N₂O₃
MW: 196.2 g/mol

VQ-035079

Reference Standard

2-[(Methylsulfanyl)methyl]oxirane chemical structure

2-[(Methylsulfanyl)methyl]oxirane

CAS: 45378-62-9
Formula: C₄H₈OS
MW: 104.17 g/mol

VQ-035093

Reference Standard

2-[(S)-(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine (2R,3R)-2,3-Dihydroxybutanedioate chemical structure

2-[(S)-(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine (2R,3R)-2,3-Dihydroxybutanedioate

CAS: 210095-58-2
Formula: C₂₁H₂₅ClN₂O₇
MW: 452.9 g/mol

VQ-021790

Reference Standard

2-[[(5-Nitro-2-thiazolyl)amino]carbonyl]phenyl 2-(acetyloxy)benzoate chemical structure

2-[[(5-Nitro-2-thiazolyl)amino]carbonyl]phenyl 2-(acetyloxy)benzoate

CAS: 952686-58-7
Formula: C₁₉H₁₃N₃O₇S
MW: 427.4 g/mol

VQ-023269

Reference Standard

2-[[(Aminothioxomethyl)amino]carbonyl]-2-ethyl-3-methylhexanoic Acid chemical structure

2-[[(Aminothioxomethyl)amino]carbonyl]-2-ethyl-3-methylhexanoic Acid

CAS: 93227-84-0
Formula: C₁₁H₂₀N₂O₃S
MW: 260.36 g/mol

VQ-034202

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