The Cetirizine hydrochloride is an organic compound with the formula C₂₁H₂₅ClN₂O₃^.2(HCl). The IUPAC name of this chemical is 2-[2-[4-[(4-chlorophenyl)-phenylmethyl]piperazin-1-yl]ethoxy]acetic acid dihydrochloride. With the CAS registry number 83881-52-1, it is also named as (+-)-(2-(4-(p-Chloro-alpha-phenylbenzyl)-1-piperazinyl)ethoxy)acetic acid, dihydrochloride. The classification codes are Antihistaminic; Drug / Therapeutic Agent; Reproductive Effect.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 2.17; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -0.25; (4)ACD/LogD (pH 7.4): -1.09; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1.37; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 5; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 8; (12)Polar Surface Area: 42.01 Å²; (13)Enthalpy of Vaporization: 86.31 kJ/mol; (14)Vapour Pressure: 1.39E-12 mmHg at 25°C; (15)Rotatable Bond Count: 8; (16)Exact Mass: 460.108726; (17)MonoIsotopic Mass: 460.108726; (18)Topological Polar Surface Area: 53; (19)Heavy Atom Count: 29; (20)Complexity: 443.

Uses of Cetirizine hydrochloride: It is a potent second-generation histamine H1 antagonist that is effective in the treatment of allergic rhinitis, chronic urticaria, and pollen-induced asthma. Unlike many traditional antihistamines, it does not cause drowsiness or anticholinergic side effects.

When you are using this chemical, please be cautious about it as the following:
It is not only harmful if swallowed, but also irritating to eyes, respiratory system and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing.

People can use the following data to convert to the molecule structure. 
1. SMILES:Cl.Cl.Clc1ccc(cc1)C(c2ccccc2)N3CCN(CC3)CCOCC(=O)O
2. InChI:InChI=1/C21H25ClN2O3.2ClH/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);2*1H
3. InChIKey:PGLIUCLTXOYQMV-UHFFFAOYAH

The following are the toxicity data which has been tested.