Cetirizine Impurity C dihydrochloride

Cetirizine Impurity C dihydrochloride is a specified impurity of the second-generation antihistamine Cetirizine, which is a carboxylated metabolite of hydroxyzine. This compound is a potent, orally active, and long-acting histamine H1-receptor antagonist, used in analytical research to study drug purity, stability, and pharmacokinetics in both in vitro and in vivo models.