Ammonium acid sulfite; Ammonium hydrogen sulfite; Ammonium hydrosulfite; Ammonium monosulfite; Ammonium sulfite, hydrogen; Monoammonium sulfite; Sulfurous acid, monoammonium salt; [ChemIDplus] UN2693
Colorless to yellow solid; [ICSC] Sold only in solution; [Merck Index] Available as 44% and 68% solution; [MSDSonline]
Used in preservatives, fertilizers, grain treatments, explosives, paper production, and corrosion control in drilling fluids; [HSDB] Also used in photography, food preservation, and the gold industry (cyanide destruction process); [MSDSonline]
No listed effects of short-term or long-term exposure; [ICSC] Toxic by inhalation, ingestion, and skin absorption; A strong skin and mucous membrane irritant; [CAMEO] A skin, eye, and respiratory tract irritant; Some individuals are sensitive to sulfites; [MSDSonline] See "SULFITES."
The Guide from the Emergency Response Guidebook is for "Bisulfites, aqueous solution."
Industrial Processes with risk of exposure: