Offered in powder form, Hydroxyzine HCL is known for its antihistaminic attributes. It has 99% purity level and its molecular weight is 374.90428. Melting point of this substance ranges between 190 degree C to 192 degree C and its flash point is 255.7 degree C. It is readily soluble in water and chloroform. Hydroxyzine HCL is used as anxiolytic agent and H1 receptor antagonist. Free from unpleasant smell, it has unique absorption properties. It does not dilute in ether. Its residue amount is 0.5% maximum post ignition. Standard of this substance has been verified on the basis of its storage life, composition, effectiveness and processing method.