Manganese(III) oxide
Agent Name
Manganese(III) oxide
CAS Number
1317-34-6
Formula
Mn2-O3
Major Category
Metals
Synonyms
Manganese sesquioxide; Dimanganese trioxide; Manganese manganate; Manganese sisquioxide; Manganese trioxide; Manganese(3+) oxide; Manganic oxide; [ChemIDplus]
Category
Manganese Compounds, Inorganic
Description
Black solid, insoluble in water; [Merck Index]
Sources/Uses
Found in the mineral hausmannite; [Merck Index] Used to produce ceramic magnets and semiconductors; [Ullmann]
Comments
Fine dust is flammable; Toxic by inhalation; [Hawley] See "Manganese" and linked occupational diseases.
Biomedical References
Exposure Assessment
TLV (ACGIH)
0.02 mg/m3, as Mn (respirable fraction), 0.1 mg/m3, as Mn (inhalable fraction)
PEL (OSHA)
Ceiling(OSHA)=5 mg/m3, as Mn
MAK
0.2 mg/m3, as Mn (inhalable fraction), 0.02 mg/m3, as Mn (respirable fraction)
Explanatory Notes
Decomposes at >900 deg C; [Ullmann]
Adverse Effects
Neurotoxin
Parkinsonism
Diseases, Processes, and Activities Linked to This Agent
Diseases
Occupational diseases associated with exposure to this agent:
Processes
Industrial Processes with risk of exposure: