Ammonium sulfite is a colorless to yellow crystalline
(sand-like or sugar-like) solid, normally sold or used
in a 40% solution.
Ammonium bisulfite is a white crystalline solid
or colorless to yellow solution.
Ammonium bisulfite is colorless crystals which are soluble in water. Ammonium bisulfite is noncombustible. Ammonium bisulfite is corrosive to aluminum. Ammonium bisulfite is a strong irritant to skin and mucous membranes. Ammonium bisulfite is toxic by skin absorption.
Inorganic reducing agents, such as AMMONIUM BISULFITE, react with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. Their reactions with oxidizing agents may be violent. Sulfites and hydrosulfites (dithionites) can react explosively with strong oxidizing agents. Sulfites generate gaseous sulfur dioxide in contact with oxidizing acids and nonoxidizing acids.
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Special Hazards of Combustion Products: None
A corrosive solid. When heated to decomposition it emits toxic vapors of NH4-
Used as a preservative, in drilling
fluids, making industrial explosives, hair waving and
bleaching agents; for making other chemicals. A source of
sulfur in liquid fertilizers.
UN2693 Bisulfites, inorganic, aqueous solutions,
n.o.s., Hazard class: 8; Labels: 8-Corrosive material.
UN3077 Environmentally hazardous substances, solid, n.o.
s., Hazard class: 9; Labels: 9-Miscellaneous hazardous
material, Technical Name Required.
Sulfites react explosively on contact
with oxidizers. Reacts with acids, acid fumes releasing sulfur
dioxide. Reacts with water. Corrosive to metals.
Incinerate. It may be possible
to dispose of waste material at a municipal facility if treated,
neutralized, and oxidized.
