CAS 83881-52-1 appears in our catalog under these names: Cetirizine.2HCl, 1mg/ml in Acetonitrile/Water : 1/1 (as free base), Cetirizine DiHCl, Cetirizine Dihydrochloride, Cetirizine Dihydrochloride 1.0 mg/ml in Water (as free base), Cetirizine.2HCl. Offered by: Lipomed, Chemat Brand, Mikromol, LoGiCal, Dr. Ehrenstorfer. Available pack sizes: 1ml, on request, 250mg, 10mg, 50mg, 100mg, 200mg, 500mg.