Hydrosulfuric calcium bromide, also known as calcium sulfhydrate bromide or calcium hydrogen sulfide bromide, is an inorganic compound with the formula Ca(SH)(Br). It is a colourless solid that is highly soluble in water. It is a source of hydrogen sulfide and bromide ions, and it has been used as a reagent in analytical chemistry.

Hydrosulfuric calcium bromide can be prepared by reacting calcium hydroxide with hydrogen sulfide gas and bromine gas in the presence of water. It can also be prepared by reacting calcium sulfide with hydrobromic acid.

Hydrosulfuric calcium bromide is a strong reducing agent, and it can react with oxidizing agents to produce a variety of products, including elemental sulfur, calcium sulfate, and calcium bromide. It is also a corrosive compound, and it can cause skin and eye irritation.

Hydrosulfuric calcium bromide has been used in a variety of applications, including:

* As a reagent in analytical chemistry, it can be used to precipitate metals as their sulfides.

* As a source of hydrogen sulfide gas, it can be used in a variety of industrial processes, including the production of paper and textiles.

* As a reducing agent, it can be used to remove oxygen from metals and other materials.

* As a corrosion inhibitor, it can be used to protect metals from corrosion by forming a protective film on the surface of the metal.

Hydrosulfuric calcium bromide is a hazardous compound, and it should be handled with care. It is important to wear protective clothing and goggles when working with this compound, and it should be stored in a cool, dry place.