Manganese tetroxide (as Mn)
Synonyms & Trade Names
Manganese oxide, Manganomanganic oxide, Trimanganese tetraoxide, Trimanganese tetroxidePhysical Description
Brownish-black powder. [Note: Fumes are generated whenever manganese oxides are heated strongly in air.]Molecular Weight
228.8Boiling Point
?Melting Point
2847°FSolubility
InsolubleVapor Pressure
0 mmHg (approx)Ionization Potential
NASpecific Gravity
4.88Flash Point
NAUpper Exposive Limit
NALower Explosive Limit
NAIncompatibilities & Reactivities
Soluble in hydrochloric acid (liberates chlorine gas)Exposure Routes
inhalation, ingestion, skin and/or eye contactSymptoms
Asthenia, insomnia, mental confusion; low-back pain; vomiting; malaise (vague feeling of discomfort), lassitude (weakness, exhaustion); kidney damage; pneumonitisTarget Organs
respiratory system, central nervous system, blood, kidneysPersonal Protection/Sanitation
(See protection codes)Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:Daily
First Aid
(See procedures)Eye:Irrigate immediately
Skin:Soap wash
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations
Not available.
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division