Product name:Ammonium hydrogen sulfate
Synonym:Sulfuric acid, mono ammonium salt;Ammonium bisulphate;Ammonium hydrogensulphate
CAS:7803-63-6
Molecular Formula:H5NO4S
Formula Weight:115.11
Density:1.79 g/mL at 25 °C(lit.)
Boiling point:350 °C (dec.)(lit.)
Melting point:147 °C
Appearance:White crystalline powder or lump
Storage conditions:Low temperature drying
Description:Ammonium bisulfate, also known as ammonium hydrogen sulfate, is a white, crystalline solid when it is completely pure, with formula (NH4)HSO4. It is commonly collected as a byproduct of flue gas desulfurization, formed by partial neutralization of sulfuric acid (H2SO4) aerosols by gaseous ammonia, NH3. Indeed, the solid material can collect on and foul solid surfaces in the flues. It is too acidic for most end uses, and is corrosive to the skin. It can be further neutralized with ammonia to form ammonium sulfate, a valuable fertilizer.
It can be used as a weaker alternative to sulfuric acid, although sodium bisulfate is much more common.