Ammonium sulfite

  • Diammonium sulfite
  • Diammonium sulfonate
  • Sulfurous acid, diammonium salt
Formula
(NH4)2SO3
Structure
Description
Ammonium sulfite is a colorless crystalline solid.
Uses
In prodn of caramel.

Registry Numbers and Inventories.
CAS
10196-04-0
EC (EINECS/ELINCS)
233-484-9
RTECS
WT3505000
UN (DOT)
9090
Merck
12,594
Beilstein/Gmelin
6044 (G)
Swiss Giftliste 1
G-8066
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H8N2O3S
Formula mass
116.14
Sublimation point, °C
150
Decomposition point, °C
60-70
Density
1.41 g/cm3 (25 C)
Solubility in water
Soluble

Hazards and Protection.
Storage
Keep containers tightly closed in a well ventilated, cool area away from food products. Keep away from heat and water.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Protect against both inhalation and contact with the skin. Must wear protective clothing including niosh approved rubber gloves and boots, safety goggles or face mask, and a respirator whose canister is specifically approved for this material.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Add calcium hypochlorite (Ca(ClO)2). Adjust pH to neutral (pH=7).
Stability
Keep tightly closed and in a cool location.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Fire potential
Nonflammable.
Hazards
Containers may explode when heated.
Combustion products
Toxic sulfur dioxide and oxides of nitrogen may form in fires.
Health
-
 
Flammability
2
 

Health.
Poison_Class
3
Exposure effects
   Ingestion
Acute ingestions of 3.5 Mg/kg produce vomiting in most individuals. Larger doses may result in gastric irritation, abdominal pain, and gastric hemorrhage.
   Inhalation
Inhalation of material may be harmful.
   Skin
Generalized urticaria and allergic eczematous dermatitis may be noted.
   Eyes
See Skin.

First aid
 
   Ingestion
Give large amount of water; get medical attention.
   Inhalation
Move to fresh air.
   Skin
Flush with water.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
9090
Response guide
Hazard class
6.1
USCG CHRIS Code
AMF
 
Std. Transport #
4962659