Escitalopram Related Compounds & Impurities

Escitalopram is the S-enantiomer of citalopram and the most selective SSRI, used for major depressive disorder and generalised anxiety disorder.

Simson Pharma Limited along with its subsidiary offices Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) is a trusted manufacturer and supplier of high-quality pharmaceutical reference standards, offering a comprehensive portfolio of Escitalopram reference standards, pharmacopeial and non-pharmacopeial Escitalopram impurities, related compounds, related substances, metabolites, stable isotope-labelled compounds, deuterium labelled compounds and nitrosamine (N-NO) reference standards.

These materials support pharmaceutical research and development, product development, ANDA and DMF submissions, quality control (QC), analytical method development and validation, stability studies, impurity identification, and genotoxic impurity assessment.

Our Escitalopram-related reference standards are thoroughly characterized using advanced analytical techniques and are supplied with comprehensive Certificates of Analysis (COA) and supporting analytical data from our USFDA certified, ISO 17025 and ISO 17034 accredited Lab, to meet global regulatory expectations. EP and USP traceable reference standards can also be provided upon request, subject to availability. Simson is also a provider of EP and USP traceable standards. To ensure consistent quality and reliability, our reference standards are periodically re-tested according to established quality management procedures.

Pharmaceutical Reference Standards / Impurity Standards

Escitalopram Oxalate
Escitalopram Oxalate
  • CAT. No.E060000
  • CAS. No.219861-08-2
  • Mol. F.C20H21FN2O.C2H2O4
  • Mol. W.414.43 g/mol
  • Stock Status:Instock
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Escitalopram Oxalate
Escitalopram Oxalate
  • CAT. No.E060000A
  • CAS. No.219861-08-2
  • Mol. F.C20H21FN2O.C2H2O4
  • Mol. W.414.43 g/mol
  • Stock Status:Under Synthesis
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Escitalopram
Escitalopram
  • CAT. No.E060000B
  • CAS. No.128196-01-0
  • Mol. F.C20H21FN2O
  • Mol. W.324.39 g/mol
  • Stock Status:Custom Synthesis
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N-Chloromethyl Escitalopram Impurity
N-Chloromethyl Escitalopram Impurity
  • CAT. No.E060002
  • CAS. No.1248478-42-3
  • Mol. F.C21H23FN2O.Cl
  • Mol. W.373.70 g/mol
  • Stock Status:Custom Synthesis
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N-Chloromethyl Escitalopram Chloride
N-Chloromethyl Escitalopram Chloride
  • CAT. No.E060002A
  • CAS. No.NA
  • Mol. F.C21H23Cl2FN2O
  • Mol. W.409.32 g/mol
  • Stock Status:Custom Synthesis
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Di-p-toluoyl-D-tartaric Acid Monohydrate
Di-p-toluoyl-D-tartaric Acid Monohydrate
  • CAT. No.E060003
  • CAS. No.71607-31-3
  • Mol. F.C20H18O8H2O
  • Mol. W.404.37 g/mol
  • Stock Status:Custom Synthesis
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ESCitalopram N-Oxide
ESCitalopram N-Oxide
  • CAT. No.E060004
  • CAS. No.917482-45-2
  • Mol. F.C20H21FN2O2
  • Mol. W.340.39 g/mol
  • Stock Status:Instock
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Citalopram Addition Product
Citalopram Addition Product
  • CAT. No.E060005A
  • CAS. No.717133-25-0
  • Mol. F.C20H23FN2O2.HCl
  • Mol. W.378.87 g/mol
  • Stock Status:Instock
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5-Carboxyphthalide
5-Carboxyphthalide
  • CAT. No.E060006
  • CAS. No.4792-29-4
  • Mol. F.C9H6O4
  • Mol. W.178.14 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram Acid impurity
Escitalopram Acid impurity
  • CAT. No.E060008
  • CAS. No.1133881-04-5
  • Mol. F.C20H22FNO3
  • Mol. W.343.40 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram USP Related Compound A
Escitalopram USP Related Compound A
  • CAT. No.E060009
  • CAS. No.128173-53-5
  • Mol. F.C20H23FN2O2.1/2C20H18O8
  • Mol. W.1071.16 g/mol
  • Stock Status:Instock
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4-(5-(dimethylamino)-1-(4-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzoic acid
4-(5-(dimethylamino)-1-(4-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzoic acid
  • CAT. No.E060010
  • CAS. No.NA
  • Mol. F.C21H26FNO4
  • Mol. W.375.44 g/mol
  • Stock Status:Custom Synthesis
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4-(5-(dimethylamino)-1-(4-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzamide
4-(5-(dimethylamino)-1-(4-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzamide
  • CAT. No.E060011
  • CAS. No.NA
  • Mol. F.C21H27FN2O3
  • Mol. W.374.46 g/mol
  • Stock Status:Custom Synthesis
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4-(5-(dimethylamino)-1-(2-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzoic acid
4-(5-(dimethylamino)-1-(2-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzoic acid
  • CAT. No.E060012
  • CAS. No.NA
  • Mol. F.C21H26FNO4
  • Mol. W.375.44 g/mol
  • Stock Status:Custom Synthesis
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4-(5-(dimethylamino)-1-(2-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzamide
4-(5-(dimethylamino)-1-(2-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzamide
  • CAT. No.E060013
  • CAS. No.NA
  • Mol. F.C21H27FN2O3
  • Mol. W.374.46 g/mol
  • Stock Status:Custom Synthesis
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4-(5-(dimethylamino)-1-(2-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzonitrile
4-(5-(dimethylamino)-1-(2-fluorophenyl)-2-hydroxypentyl)-3-(hydroxymethyl)benzonitrile
  • CAT. No.E060014
  • CAS. No.NA
  • Mol. F.C21H25FN2O2
  • Mol. W.356.44 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram EP Impurity F
Escitalopram EP Impurity F
  • CAT. No.E060015
  • CAS. No.2102609-59-4
  • Mol. F.C14H18N2O2
  • Mol. W.246.30 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram amide
Escitalopram amide
  • CAT. No.E060016
  • CAS. No.NA
  • Mol. F.NA
  • Mol. W.NA
  • Stock Status:Custom Synthesis
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1-oxo-1,3-dihydro-2-isobenzofurancarboxamide
1-oxo-1,3-dihydro-2-isobenzofurancarboxamide
  • CAT. No.E060017
  • CAS. No.85118-25-8
  • Mol. F.C9H7NO3
  • Mol. W.177.16 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram Oxalate Resolution Mixtuture 50:50
Escitalopram Oxalate Resolution Mixtuture 50:50
  • CAT. No.E060019
  • CAS. No.NA
  • Mol. F.NA
  • Mol. W.NA
  • Stock Status:Custom Synthesis
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Citalopram Carboxylic Acid Impurity
Citalopram Carboxylic Acid Impurity
  • CAT. No.E060020
  • CAS. No.440121-09-5
  • Mol. F.C20H22FNO3
  • Mol. W.343.39 g/mol
  • Stock Status:Custom Synthesis
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4-methylundecane
4-methylundecane
  • CAT. No.E060021
  • CAS. No.2980-69-0
  • Mol. F.C12H26
  • Mol. W.170.34 g/mol
  • Stock Status:Custom Synthesis
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5-methylundecane
5-methylundecane
  • CAT. No.E060022
  • CAS. No.1632-70-8
  • Mol. F.C12H26
  • Mol. W.170.34 g/mol
  • Stock Status:Custom Synthesis
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EsCitalopram N-Desmethyl
EsCitalopram N-Desmethyl
  • CAT. No.E060023
  • CAS. No.144025-14-9
  • Mol. F.C19H19FN2O
  • Mol. W.310.37 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram Butyryl Impurity
Escitalopram Butyryl Impurity
  • CAT. No.E060024
  • CAS. No.1803244-58-7
  • Mol. F.C25H33FN2O2
  • Mol. W.412.50 g/mol
  • Stock Status:Custom Synthesis
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N-Nitroso Escitalopram Impurity
N-Nitroso Escitalopram Impurity
  • CAT. No.E060027
  • CAS. No.NA
  • Mol. F.C19H18FN3O2
  • Mol. W.339.36 g/mol
  • Stock Status:Instock
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(3-(Dimethylamino)propyl)magnesium chloride
(3-(Dimethylamino)propyl)magnesium chloride
  • CAT. No.E060028
  • CAS. No.19070-16-7
  • Mol. F.C5H12ClMgN
  • Mol. W.145.91 g/mol
  • Stock Status:Custom Synthesis
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Sodium phenyl acetate
Sodium phenyl acetate
  • CAT. No.E060029
  • CAS. No.114-70-5
  • Mol. F.C8H7NaO2
  • Mol. W.158.13 g/mol
  • Stock Status:Instock
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Escitalopram Desfluoro Impurity
Escitalopram Desfluoro Impurity
  • CAT. No.E060030
  • CAS. No.1346617-30-8
  • Mol. F.C20H22N2O
  • Mol. W.306.40 g/mol
  • Stock Status:Custom Synthesis
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4-[4-(diMethylaMino)-1-(4-fluorophenyl)-1-hydroxybutyl]-3-(hydroxyMethyl)-benzonitrile, oxalate
4-[4-(diMethylaMino)-1-(4-fluorophenyl)-1-hydroxybutyl]-3-(hydroxyMethyl)-benzonitrile, oxalate
  • CAT. No.E060031
  • CAS. No.717133-32-9
  • Mol. F.C22H25FN2O6
  • Mol. W.432.45 g/mol
  • Stock Status:Custom Synthesis
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Oxime Impurity of Escitalopram Oxalate
Oxime Impurity of Escitalopram Oxalate
  • CAT. No.E060032
  • CAS. No.227954-88-3
  • Mol. F.C20H23FN2O2
  • Mol. W.342.41 g/mol
  • Stock Status:Custom Synthesis
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N-(chloromethyl)-3-(5-cyano-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-1-yl)-N,N-dimethylpropan-1-aminium chloride
N-(chloromethyl)-3-(5-cyano-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-1-yl)-N,N-dimethylpropan-1-aminium chloride
  • CAT. No.E060033
  • CAS. No.NA
  • Mol. F.C21H23Cl2FN2O
  • Mol. W.409.32 g/mol
  • Stock Status:Custom Synthesis
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Butanedioic acid,2,3-bis[(4-methylbenzoyl)oxy]-, 1-[[5-cyano-2-[(1S)-4-(dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl]phenyl]methyl] ester,(2S,3S)
Butanedioic acid,2,3-bis[(4-methylbenzoyl)oxy]-, 1-[[5-cyano-2-[(1S)-4-(dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl]phenyl]methyl] ester,(2S,3S)
  • CAT. No.E060034
  • CAS. No.2173043-05-3
  • Mol. F.C40H39FN2O9
  • Mol. W.710.75 g/mol
  • Stock Status:Custom Synthesis
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(R)-Desmethyl Citalopram Nitroso Impurity
(R)-Desmethyl Citalopram Nitroso Impurity
  • CAT. No.E060035
  • CAS. No.NA
  • Mol. F.C19H18FN3O2
  • Mol. W.339.36 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram EP Impurity L
Escitalopram EP Impurity L
  • CAT. No.E060036
  • CAS. No.1026009-77-7
  • Mol. F.C20H22N2O
  • Mol. W.306.40 g/mol
  • Stock Status:Instock
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Nitroso-Escitalopram Impurity A
Nitroso-Escitalopram Impurity A
  • CAT. No.E060038
  • CAS. No.NA
  • Mol. F.C19H20FN3O3
  • Mol. W.357.38 g/mol
  • Stock Status:Custom Synthesis
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Nitroso-Escitalopram Impurity B
Nitroso-Escitalopram Impurity B
  • CAT. No.E060039
  • CAS. No.NA
  • Mol. F.C19H16FN3O3
  • Mol. W.353.35 g/mol
  • Stock Status:Custom Synthesis
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Nitroso-Escitalopram Impurity 2
Nitroso-Escitalopram Impurity 2
  • CAT. No.E060041
  • CAS. No.NA
  • Mol. F.C19H19N3O2
  • Mol. W.321.37 g/mol
  • Stock Status:Custom Synthesis
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Nitroso Cyanodiol
Nitroso Cyanodiol
  • CAT. No.E060042
  • CAS. No.NA
  • Mol. F.C19H20FN3O3
  • Mol. W.357.38 g/mol
  • Stock Status:Custom Synthesis
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N-Nitroso-Desmethyl-Escitalopram
N-Nitroso-Desmethyl-Escitalopram
  • CAT. No.E060043
  • CAS. No.NA
  • Mol. F.C19H18FN3O2
  • Mol. W.339.36 g/mol
  • Stock Status:Instock
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Escitalopram Hydrobromide
Escitalopram Hydrobromide
  • CAT. No.E060044
  • CAS. No.481047-50-1
  • Mol. F.C20H21FN2O.HBr
  • Mol. W.405.30 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram Impurity 14 Oxalate
Escitalopram Impurity 14 Oxalate
  • CAT. No.E060045
  • CAS. No.NA
  • Mol. F.C22H22FN3O2.C2H2O4
  • Mol. W.469.46 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram Oxalate form 1
Escitalopram Oxalate form 1
  • CAT. No.E060046
  • CAS. No.219861-08-2
  • Mol. F.C20H21FN2O.C2H2O4
  • Mol. W.414.43 g/mol
  • Stock Status:Please Enquire
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Escitalopram EP Impurity L Hydrochloride
Escitalopram EP Impurity L Hydrochloride
  • CAT. No.E060047
  • CAS. No.1148027-85-3
  • Mol. F.C20H22N2O.HCl
  • Mol. W.342.86 g/mol
  • Stock Status:Instock
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Metabolites

Escitalopram Propionic Acid
Escitalopram Propionic Acid
  • CAT. No.E060037
  • CAS. No.NA
  • Mol. F.C18H14FNO3
  • Mol. W.311.31 g/mol
  • Stock Status:Custom Synthesis
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Isotope Labelled Compounds

Escitalopram D4 Oxalate
Escitalopram D4 Oxalate
  • CAT. No.E060007
  • CAS. No.219861-08-2
  • Mol. F.C20H17D4FN2O.C2H2O4
  • Mol. W.418.45 g/mol
  • Stock Status:Custom Synthesis
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Escitalopram D3 oxalate
Escitalopram D3 oxalate
  • CAT. No.E060040
  • CAS. No.NA
  • Mol. F.C20H18D3FN2O.C2H2O4
  • Mol. W.417.45 g/mol
  • Stock Status:Instock
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