1.0 2016-06-03 13:32:17 UTC 2026-05-14 18:19:17 UTC levocetrizine SmallMolecule Levocetrizine is an organic compound with the formula C21H25ClN2O3 and an average molecular weight of 388.89 g/mol. Levocetrizine belongs to the diphenylmethanes, a subclass of benzene and substituted derivatives within the organic compounds. It acts as an antagonist and inhibitor of the Histamine H1 receptor (HRH1). This compound is found in or released from three recorded sources, including antihistamines within healthcare, pharmaceuticals, and veterinary products, as well as tobacco product cases and other smoking requisites within household cleaning and consumer products. Recorded exposure routes for levocetrizine include oral, topical, and transdermal administration. C21H25ClN2O3 388.89 388.1553704 2-(2-{4-[(R)-(4-chlorophenyl)(phenyl)methyl]piperazin-1-yl}ethoxy)acetic acid (-)-cetirizine 130018-77-8 OC(=O)COCCN1CCN(CC1)[C@H](C1=CC=CC=C1)C1=CC=C(Cl)C=C1 InChI=1S/C21H25ClN2O3/c22-19-8-6-18(7-9-19)21(17-4-2-1-3-5-17)24-12-10-23(11-13-24)14-15-27-16-20(25)26/h1-9,21H,10-16H2,(H,25,26)/t21-/m1/s1 ZKLPARSLTMPFCP-OAQYLSRUSA-N Detected and Not Quantified Levocetirizine H1-Antihistamine Action SMP0059114 Levocetirizine Drug Metabolism Action Pathway SMP0144031 Levocetirizine H1 Antihistamine Smooth Muscle Relaxation Action Pathway SMP0174909 Levocetirizine H1-Antihistamine Blood Vessel Constriction Action Pathway SMP0175001 Levocetirizine H1-Antihistamine Immune Response Action Pathway SMP0175093 logp 0.87 logp 2.98 ALOGPS logs -3.77 ALOGPS solubility 6.58e-02 g/l ALOGPS logp 0.87 ChemAxon pka_strongest_acidic 3.59 ChemAxon pka_strongest_basic 7.42 ChemAxon iupac 2-(2-{4-[(R)-(4-chlorophenyl)(phenyl)methyl]piperazin-1-yl}ethoxy)acetic acid ChemAxon average_mass 388.89 ChemAxon mono_mass 388.1553704 ChemAxon smiles OC(=O)COCCN1CCN(CC1)[C@H](C1=CC=CC=C1)C1=CC=C(Cl)C=C1 ChemAxon formula C21H25ClN2O3 ChemAxon inchi InChI=1S/C21H25ClN2O3/c22-19-8-6-18(7-9-19)21(17-4-2-1-3-5-17)24-12-10-23(11-13-24)14-15-27-16-20(25)26/h1-9,21H,10-16H2,(H,25,26)/t21-/m1/s1 ChemAxon inchikey ZKLPARSLTMPFCP-OAQYLSRUSA-N ChemAxon polar_surface_area 53.01 ChemAxon refractivity 106.87 ChemAxon polarizability 41.93 ChemAxon rotatable_bond_count 8 ChemAxon acceptor_count 5 ChemAxon donor_count 1 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon #<HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f3baed069c0> DB06282 1549000 BE0000442