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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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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-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

Reference Standard

4-Chloro-2-Fluoronitrobenzene chemical structure

4-Chloro-2-Fluoronitrobenzene

CAS: 700-37-8
Formula: C₆H₃ClFNO₂
MW: 175.54 g/mol

VQ-043994

Reference Standard

4-Chloro-2-Formyl-Benzoic Acid chemical structure

4-Chloro-2-Formyl-Benzoic Acid

CAS: 4657-56-1
Formula: C₈H₅ClO₃
MW: 184.57 g/mol

VQ-023415

Reference Standard

4-Chloro-2-nitrobenzoic acid chemical structure

4-Chloro-2-nitrobenzoic acid

CAS: 6280-88-2
Formula: C₇H₄ClNO₄
MW: 201.56 g/mol

VQ-036501

Reference Standard

4-Chloro-2-nitrophenylacetic Acid chemical structure

4-Chloro-2-nitrophenylacetic Acid

CAS: 37777-71-2
Formula: C₈H₆ClNO₄
MW: 215.59 g/mol

VQ-028787

Reference Standard

4-Chloro-3-(4-ethoxybenzyl)phenol chemical structure

4-Chloro-3-(4-ethoxybenzyl)phenol

CAS: 1408077-50-8
Formula: C₁₅H₁₅ClO₂
MW: 262.73 g/mol

VQ-036520

Reference Standard

4-Chloro-3-(chlorosulfonyl)benzoic Acid chemical structure

4-Chloro-3-(chlorosulfonyl)benzoic Acid

CAS: 2494-79-3
Formula: C₇H₄Cl₂O₄S
MW: 255.07 g/mol

VQ-037697

Reference Standard

4-Chloro-3-(ethoxysulfonyl)benzoic Acid chemical structure

4-Chloro-3-(ethoxysulfonyl)benzoic Acid

CAS: 604787-44-2
Formula: C₉H₉ClO₅S
MW: 264.68 g/mol

VQ-044236

Reference Standard

4-Chloro-3-(pyridin-2-yl)benzenamine chemical structure

4-Chloro-3-(pyridin-2-yl)benzenamine

CAS: 879088-41-2
Formula: C₁₁H₉ClN₂
MW: 204.65 g/mol

VQ-028720

Reference Standard

4-Chloro-3-methoxy-2-methyl-pyridine hydrochloride chemical structure

4-Chloro-3-methoxy-2-methyl-pyridine hydrochloride

CAS: 1951439-74-9
Formula: C₇H₉Cl₂NO
MW: 194.06 g/mol

VQ-041324

Reference Standard

4-Chloro-3-methoxyaniline chemical structure

4-Chloro-3-methoxyaniline

CAS: 13726-14-2
Formula: C₇H₈ClNO
MW: 157.6 g/mol

VQ-039081

Reference Standard

4-Chloro-3-nitro-5-sulfamoylbenzoic Acid chemical structure

4-Chloro-3-nitro-5-sulfamoylbenzoic Acid

CAS: 22892-96-2
Formula: C₇H₅ClN₂O₆S
MW: 280.64 g/mol

VQ-029534

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