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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-(4-Chlorophenyl)-2-cyclopentyl-2-hydroxyacetic acid chemical structure

2-(4-Chlorophenyl)-2-cyclopentyl-2-hydroxyacetic acid

CAS: 92021-41-5
Formula: C₁₃H₁₅ClO₃
MW: 254.71 g/mol

VQ-037549

Reference Standard

2-(4-Chlorophenyl)-4-(dimethylamino)butanenitrile chemical structure

2-(4-Chlorophenyl)-4-(dimethylamino)butanenitrile

CAS: 73775-50-5
Formula: C₁₂H₁₅ClN₂
MW: 222.71 g/mol

VQ-047759

Reference Standard

2-(4-Ethyl-3-iodophenyl)-2-methylpropanoic Acid chemical structure

2-(4-Ethyl-3-iodophenyl)-2-methylpropanoic Acid

CAS: 1256584-73-2
Formula: C₁₂H₁₅IO₂
MW: 318.15 g/mol

VQ-035650

Reference Standard

2-(4-Ethyl-5-oxo-2,5-dihydrofuran-3-yl)acetic Acid chemical structure

2-(4-Ethyl-5-oxo-2,5-dihydrofuran-3-yl)acetic Acid

CAS: 19918-71-9
Formula: C₈H₁₀O₄
MW: 170.16 g/mol

VQ-033184

Reference Standard

2-(4-Ethylpiperazin-1-yl)-4-(4-(4-ethylpiperazin-1-yl)phenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine chemical structure

2-(4-Ethylpiperazin-1-yl)-4-(4-(4-ethylpiperazin-1-yl)phenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine

CAS: 1648791-23-4
Formula: C₂₉H₄₃N₅
MW: 461.7 g/mol

VQ-029466

Reference Standard

2-(4-Ethylpiperazin-1-yl)-4-phenyl-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine chemical structure

2-(4-Ethylpiperazin-1-yl)-4-phenyl-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine

CAS: 132810-75-4
Formula: C₂₃H₃₁N₃
MW: 349.5 g/mol

VQ-024614

Reference Standard

2-(4-Fluoro-3-phenoxyphenyl)-2-hydroxyacetonitrile chemical structure

2-(4-Fluoro-3-phenoxyphenyl)-2-hydroxyacetonitrile

CAS: 76783-44-3
Formula: C₁₄H₁₀FNO₂
MW: 243.23 g/mol

VQ-039178

Reference Standard

2-(4-Fluorophenyl)-5-(2-Methylbenzyl)thiophene chemical structure

2-(4-Fluorophenyl)-5-(2-Methylbenzyl)thiophene

CAS: 2005454-69-1
Formula: C₁₈H₁₅FS
MW: 282.4 g/mol

VQ-020693

Reference Standard

2-(4-Fluorophenyl)cyclopropan-1-amine chemical structure

2-(4-Fluorophenyl)cyclopropan-1-amine

CAS: 879396-75-5
Formula: C₉H₁₀FN
MW: 151.18 g/mol

VQ-042543

Reference Standard

2-(4-Hydroxybenzoyl)benzoic acid chemical structure

2-(4-Hydroxybenzoyl)benzoic acid

CAS: 85-57-4
Formula: C₁₄H₁₀O₄
MW: 242.23 g/mol

VQ-043367

Reference Standard

2-(4-Hydroxyphenyl)benzo[b]thiophen-6-ol chemical structure

2-(4-Hydroxyphenyl)benzo[b]thiophen-6-ol

CAS: 63676-22-2
Formula: C₁₄H₁₀O₂S
MW: 242.29 g/mol

VQ-043271

Reference Standard

2-(4-Isobutylphenyl)prop-2-enoic Acid chemical structure

2-(4-Isobutylphenyl)prop-2-enoic Acid

CAS: 6448-14-2
Formula: C₁₃H₁₆O₂
MW: 204.26 g/mol

VQ-031143

Reference Standard

2-(4-Isobutylphenyl)propanal chemical structure

2-(4-Isobutylphenyl)propanal

CAS: 51407-46-6
Formula: C₁₃H₁₈O
MW: 190.28 g/mol

VQ-026119

Reference Standard

2-(4-Isobutylphenyl)propiononitrile chemical structure

2-(4-Isobutylphenyl)propiononitrile

CAS: 58609-73-7
Formula: C₁₃H₁₇N
MW: 187.28 g/mol

VQ-037623

Reference Standard

2-(4-Isobutyrylphenyl)propanamide chemical structure

2-(4-Isobutyrylphenyl)propanamide

CAS: 1823308-53-7
Formula: C₁₃H₁₇NO₂
MW: 219.28 g/mol

VQ-031129

Reference Standard

2-(4-Isobutyrylphenyl)propane chemical structure

2-(4-Isobutyrylphenyl)propane

CAS: 72846-62-9
Formula: C₁₃H₁₈O
MW: 190.28 g/mol

VQ-027246

Reference Standard

2-(4-Isopropylphenyl)propanoicacid chemical structure

2-(4-Isopropylphenyl)propanoicacid

CAS: 3585-48-6
Formula: C₁₂H₁₆O₂
MW: 192.25 g/mol

VQ-037627

Reference Standard

2-(4-Methanesulfonylphenyl)-1-pyridin-3-ylethanone chemical structure

2-(4-Methanesulfonylphenyl)-1-pyridin-3-ylethanone

CAS: 40061-50-5
Formula: C₁₄H₁₃NO₃S
MW: 275.32 g/mol

VQ-030626

Reference Standard

2-(4-Methoxy-1H-indol-3-yl)ethanamine chemical structure

2-(4-Methoxy-1H-indol-3-yl)ethanamine

CAS: 3610-35-3
Formula: C₁₁H₁₄N₂O
MW: 190.24 g/mol

VQ-035266

Reference Standard

2-(4-Methoxy-3-nitrobenzylsulfinyl)acetic acid chemical structure

2-(4-Methoxy-3-nitrobenzylsulfinyl)acetic acid

CAS: 852285-78-0
Formula: C₁₀H₁₁NO₆S
MW: 273.26 g/mol

VQ-041904

Reference Standard

2-(4-n-Propylphenyl)propionic Acid chemical structure

2-(4-n-Propylphenyl)propionic Acid

CAS: 3585-47-5
Formula: C₁₂H₁₆O₂
MW: 192.25 g/mol

VQ-026116

Reference Standard

2-(4-Nitro-1-oxoisoindolin-2-yl)pentanedioic Acid chemical structure

2-(4-Nitro-1-oxoisoindolin-2-yl)pentanedioic Acid

CAS: 295357-72-1
Formula: C₁₃H₁₂N₂O₇
MW: 308.24 g/mol

VQ-031480

Reference Standard

2-(4-Nitrosopiperazin-1-yl)ethan-1-ol chemical structure

2-(4-Nitrosopiperazin-1-yl)ethan-1-ol

CAS: 48121-20-6
Formula: C₆H₁₃N₃O₂
MW: 159.19 g/mol

VQ-021618

Reference Standard

2-(4-nitrosopiperazin-1-yl)pyrimidine chemical structure

2-(4-nitrosopiperazin-1-yl)pyrimidine

CAS: 872826-80-7
Formula: C₈H₁₁N₅O
MW: 193.21 g/mol

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