Tetrafluoroboric acid, also known as hydrogen tetrafluoroborate, is a strong and corrosive acid commonly used in various industrial applications like metal cleaning, etching, and electroplating. It is composed of boron, fluorine, and hydrogen, and is highly soluble in water. Some of the synonyms associated with tetrafluoroboric acid include tetrafluoroborate, BF4H, hydrofluoroboric acid, and tetrafluoboric acid. In some cases, it can also be referred to as tetrafluoroborane or boron tetrafluoride. While the term tetrafluoroboric acid is used more commonly, all of these synonyms can be used interchangeably based on the context of the application.