Ammonium thiosulfate
Agent Name
Ammonium thiosulfate
CAS Number
7783-18-8
Formula
O3-S2.2H4-N
Major Category
Nitrogen Compounds
Synonyms
Ammo hypo; Ammonium hyposulfite; Ammonium thiosulfate ((NH4)2S2O3); Diammonium thiosulfate; Thio-Sul; Thiosulfuric acid (H2S2O3), diammonium salt; Thiosulfuric acid, diammonium salt; [ChemIDplus]
Category
Ammonium Compounds
Description
Colorless or white solid with an odor of ammonia; Hygroscopic; [HSDB] White crystalline powder; [MSDSonline]
Sources/Uses
Used to clean "white" metal and zinc-base die-cast metals and as a reducing agent and brightener in silver plating baths; Also used in photography, lubricants (for metal cold-working), fungicides, hair-waving preparations, fog screens, and in desiccants and defoliants (crop-bearing plants such as cotton, soybean, alfalfa, rice, and peppers); [HSDB]
Comments
A skin, eye, and respiratory tract irritant; Emergency treatment: "Sodium thiosulfate"; Ingestion of 12 grams of sodium thiosulfate is nontoxic except for violent laxative effect; [HSDB] Lethal dose effects include convulsions and acute tubular necrosis; [RTECS] An irritant; [MSDSonline] See "Sodium thiosulfate."
Reference Link #1
Biomedical References
Exposure Assessment
Lethal Concentration
LC (rat) > 2,260 mg/m3/4h
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: