USP Reference Standards are specified for use in conducting official USP–NF tests and assays. To confirm accuracy and reproducibility, USP Reference Standards are rigorously tested and evaluated by multiple independent laboratories including USP, commercial, regulatory, and academic labs. USP also provide publicly available, official documentary standards for pharmaceutical ingredients in the USP–NF that link directly with our primary reference standards.

Citalopram Related Compound A (1-(3-dimethylaminopropyl)-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-carboxamide) CAS 64372-56-1
Citalopram Related Compound B (1-(3-Dimethylaminopropyl)-1-(4-fluorophenyl)-3-hydroxy-1,3-dihydroisobenzofuran-5-carbonitrile oxalate) CAS 1332724-03-4
Citalopram Related Compound C (3-(3-Dimethylaminopropyl)-3-(4-fluorophenyl)-6-cyano-1(3H)-isobenzofuranone oxalate) CAS 1440961-11-4
Citalopram Related Compound D (1-(4-Fluorophenyl)-1-(3-methylaminopropyl)-1,3-dihydroisobenzofuran-5-carbonitrile hydrochloride) CAS 97743-99-2
Citalopram Related Compound E (1-(3-dimethylaminopropyl)-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-carbonitrile-N-oxide hydrochloride) CAS 62498-71-9
Citalopram Related Compound G (1-(4'-fluorophenyl)-1-(3-dimethylaminopropyl)-5-chlorophthalane hydrobromide)
Citalopram Related Compound H (1-(4'-fluorophenyl)-1-(3-dimethylaminopropyl)-5-bromophthalane hydrobromide) CAS 479065-02-6