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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-Bromomandelic acid chemical structure

4-Bromomandelic acid

CAS: 6940-50-7
Formula: C₈H₇BrO₃
MW: 231.04 g/mol

VQ-039880

Reference Standard

4-Butoxyphenol chemical structure

CAS: 122-94-1
Formula: C₁₀H₁₄O₂
MW: 166.22 g/mol

VQ-041588

Reference Standard

4-Butyramido-3-methylbenzoic acid chemical structure

4-Butyramido-3-methylbenzoic acid

CAS: 1016696-74-4
Formula: C₁₂H₁₅NO₃
MW: 221.25 g/mol

VQ-042393

Reference Standard

4-Carboxy-a-methylbenzeneacetic Acid chemical structure

4-Carboxy-a-methylbenzeneacetic Acid

CAS: 67381-50-4
Formula: C₁₀H₁₀O₄
MW: 194.18 g/mol

VQ-026122

Reference Standard

4-Carboxybenzyl bromide chemical structure

4-Carboxybenzyl bromide

CAS: 6232-88-8
Formula: C₈H₇BrO₂
MW: 215.04 g/mol

VQ-027144

Reference Standard

4-Carboxyphenylboronic acid chemical structure

4-Carboxyphenylboronic acid

CAS: 14047-29-1
Formula: C₇H₇BO₄
MW: 165.94 g/mol

VQ-032573

Reference Standard

4-Chloro Bupropion chemical structure

4-Chloro Bupropion

CAS: 1193779-34-8
Formula: C₁₃H₁₇Cl₂NO
MW: 274.18 g/mol

VQ-024695

Reference Standard

4-Chloro Bupropion Fumarate chemical structure

4-Chloro Bupropion Fumarate

CAS: 1193779-36-0
Formula: C₁₇H₂₁Cl₂NO₅
MW: 390.3 g/mol

VQ-024694

Reference Standard

4-Chloro Bupropion Hydrochloride chemical structure

4-Chloro Bupropion Hydrochloride

CAS: 1346598-72-8
Formula: C₁₃H₁₈Cl₃NO
MW: 310.6 g/mol

VQ-024688

Reference Standard

4-Chloro Dasatinib chemical structure

4-Chloro Dasatinib

CAS: 2468737-89-3
Formula: C₂₂H₂₅Cl₂N₇O₂S
MW: 522.4 g/mol

VQ-030084

Reference Standard

4-Chloro Exemestane chemical structure

4-Chloro Exemestane

CAS: 107868-36-0
Formula: C₂₀H₂₃ClO₂
MW: 330.8 g/mol

VQ-030651

Reference Standard

4-Chloro Maraviroc chemical structure

4-Chloro Maraviroc

CAS: 1391048-05-7
Formula: C₂₉H₄₁ClFN₅O
MW: 530.1 g/mol

VQ-031727

Reference Standard

4-Chloro Perphenazine chemical structure

4-Chloro Perphenazine

CAS: 875256-24-9
Formula: C₂₁H₂₆ClN₃OS
MW: 404 g/mol

VQ-045271

Reference Standard

4-Chloro-1-(3-fluorophenyl)-1-oxobutane chemical structure

4-Chloro-1-(3-fluorophenyl)-1-oxobutane

CAS: 3110-52-9
Formula: C₁₀H₁₀ClFO
MW: 200.64 g/mol

VQ-031053

Reference Standard

4-Chloro-1-(4-(1-hydroxy-2-methylpropan-2-yl)phenyl)butan-1-one chemical structure

4-Chloro-1-(4-(1-hydroxy-2-methylpropan-2-yl)phenyl)butan-1-one

CAS: 169280-25-5
Formula: C₁₄H₁₉ClO₂
MW: 254.75 g/mol

VQ-048371

Reference Standard

4-Chloro-1-(4-isopropylphenyl)butan-1-one chemical structure

4-Chloro-1-(4-isopropylphenyl)butan-1-one

CAS: 70289-38-2
Formula: C₁₃H₁₇ClO
MW: 224.72 g/mol

VQ-048372

Reference Standard

4-Chloro-1-(4-Methoxyphenyl)benzohydrazide chemical structure

4-Chloro-1-(4-Methoxyphenyl)benzohydrazide

CAS: 16390-07-1
Formula: C₁₄H₁₃ClN₂O₂
MW: 276.72 g/mol

VQ-031206

Reference Standard

4-Chloro-1-methylpiperidine chemical structure

4-Chloro-1-methylpiperidine

CAS: 5570-77-4
Formula: C₆H₁₂ClN
MW: 133.62 g/mol

VQ-025255

Reference Standard

4-Chloro-2-((furan-2-ylmethyl)amino)-5-sulfobenzoic Acid chemical structure

4-Chloro-2-((furan-2-ylmethyl)amino)-5-sulfobenzoic Acid

CAS: 2309462-39-1
Formula: C₁₂H₁₀ClNO₆S
MW: 331.73 g/mol

VQ-040771

Reference Standard

4-Chloro-2-(chloromethyl)-3-methoxypyridine Hydrochloride chemical structure

4-Chloro-2-(chloromethyl)-3-methoxypyridine Hydrochloride

CAS: 503058-51-3
Formula: C₇H₈Cl₃NO
MW: 228.5 g/mol

VQ-033047

Reference Standard

4-Chloro-2-(chloromethyl)-3-methylpyridine Hydrochloride chemical structure

4-Chloro-2-(chloromethyl)-3-methylpyridine Hydrochloride

CAS: 152402-97-6
Formula: C₇H₈Cl₃N
MW: 212.5 g/mol

VQ-031437

Reference Standard

4-Chloro-2-(chloromethyl)-3,5-dimethylpyridine chemical structure

4-Chloro-2-(chloromethyl)-3,5-dimethylpyridine

CAS: 142885-96-9
Formula: C₈H₉Cl₂N
MW: 190.07 g/mol

VQ-032742

Reference Standard

4-Chloro-2-(methylsulfonyl)benzoic Acid chemical structure

4-Chloro-2-(methylsulfonyl)benzoic Acid

CAS: 142994-03-4
Formula: C₈H₇ClO₄S
MW: 234.66 g/mol

VQ-042917

Reference Standard

4-Chloro-2-(propylthio)pyrimidin-5-amine chemical structure

4-Chloro-2-(propylthio)pyrimidin-5-amine

CAS: 2518048-22-9
Formula: C₇H₁₀ClN₃S
MW: 203.69 g/mol

VQ-042538

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