83881-46-3

Pale Yellow Oil

Cetirizine methyl ester is an impurity of Cetirizine (HY-17042). Cetirizine, a second-generation antihistamine and the carboxylated metabolite of hydroxyzine, is a specific, orally active and long-acting histamine H1-receptor antagonist[1].

[1] Do JA, et al. Collision-induced dissociation pathways of H1-antihistamines by electrospray ionization quadrupole time-of-flight mass spectrometry. Arch Pharm Res. 2017 Jun;40(6):736-745. DOI:10.1007/s12272-017-0921-2