Ultra-pure sulfuric acid (UPSA) is a microelectronic chemical reagent that is used for removing particles, inorganic content, and carbon deposited in the water. Ultra-pure sulfuric acid finds wide application in the electronic devices and semiconductors industries and thus, is also called electronic grade sulfuric acid. Parts per billion (ppb) and parts per trillion (ppt) are the two grade of UPSA. Ppt is the purest grade of UPSA acid. Ppb grade UPSA is mainly used for small units, whereas, ... Read more
