Manganese(III) oxide

  • Manganese trioxide
  • Manganese sesquioxide
  • Dimanganese trioxide
Formula
Mn2O3
Structure
Description
Black cubic crystals
Uses
Used to produce LiMn2O4, a battery cathode.

Registry Numbers and Inventories.
CAS
1317-34-6
EC (EINECS/ELINCS)
215-264-4
36/37/38
RTECS
OP0915000
RTECS class
Other
Merck
13,5761
Beilstein/Gmelin
11122 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Mn2O3
Formula mass
157.87
Melting point, °C
1347
Decomposition point, °C
942
Density
4.81 g/cm3
Dielectric constant
8
Thermal expansion
8.6E-6/K

Hazards and Protection.
Storage
Keep tightly closed.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nature of decomposition products not known.

Fire.
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Irritant. Irritating to eyes and respiratory system. Target organ(s): Lungs. Nerves.
   Ingestion
May be harmful if swallowed.
   Inhalation
Material is irritating to mucous membranes and upper respiratory tract. May be harmful if inhaled.
   Skin
Causes skin irritation. May be harmful if absorbed through the skin.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.