Hydrogendifluorides, solution

Antimony compounds are based on antimony, an element that exhibits both metal and nonmetal properties. Many of its compounds are toxic and corrosive, particularly the soluble salts. They include antimony iodide and antimony perchloride. Some antimony compounds decompose in water to produce toxic gases e.g., antimony sulphate decomposes to sulphur dioxide while antimony bromide produces bromine gas. 

Arsenic compounds are based on the metalloid arsenic. They are extremely toxic and include the arsenates, those that contain the AsO/ group 

Tellurium compounds are toxic. They include tellurium sulphide and tellurium dioxide. 

Dissociation of many inorganic acids yields a variety of salts. 

Chlorine forms a number of ions with oxygen, all of which are strong oxidizing agents. They react similarly to bromates, evolving chlorine gas in contact with acids. They include 

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The bifluorides syn. hydrogendifluorides, are crystalline solids containing the HF2 species. Examples include sodium bifluoride and potassium bifluoride. They are crystalline solids soluble in water or water-alcohol solutions and extremely corrosive to metals, glass, and other siliceous materials. They are used as etchants. 

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