Mercury (II) chloride, commonly known as mercuric chloride, is a chemical compound with the formula HgCl2. It is a white crystalline solid that is highly toxic and corrosive. HgCl2 is used in a variety of applications, including as a disinfectant, antiseptic, and fungicide. It is also used in the manufacture of other chemicals, such as calomel (Hg2Cl2) and mercuric oxide (HgO).

HgCl2 is a covalent compound that consists of a mercury atom bonded to two chlorine atoms. The mercury atom is in the +2 oxidation state, and the chlorine atoms are in the -1 oxidation state. The compound has a linear molecular structure.

HgCl2 is highly soluble in water, and it dissociates into Hg2+ and Cl- ions in solution. The Hg2+ ion is the toxic component of the compound. It can bind to proteins and enzymes in the body, and it can cause damage to the kidneys, liver, and brain.

HgCl2 is also volatile, and it can be absorbed through the skin and respiratory tract. Inhalation of HgCl2 can cause respiratory irritation, coughing, and shortness of breath. Skin contact with HgCl2 can cause skin irritation, blisters, and burns.

HgCl2 is a very dangerous chemical, and it should be handled with care. It is important to wear gloves, eye protection, and a respirator when working with HgCl2. Avoid contact with the skin and respiratory tract. If HgCl2 is spilled, it should be cleaned up immediately.

HgCl2 is a hazardous waste, and it must be disposed of properly. It is important to contact a hazardous waste disposal company for instructions on how to dispose of HgCl2.