NIOSH Pocket Guide to Chemical Hazards

Manganese tetroxide (as Mn) CAS 1317-35-7
Mn3O4 RTECS OP0895000
Synonyms & Trade Names
Manganese oxide, Manganomanganic oxide, Trimanganese tetraoxide, Trimanganese tetroxide
DOT ID & Guide
Exposure
Limits
NIOSH REL: See Appendix D
OSHA PEL�: C 5 mg/m3
IDLH N.D. Conversion
Physical Description
Brownish-black powder. [Note: Fumes are generated whenever manganese oxides are heated strongly in air.]
MW: 228.8
BP: ?
MLT: 2847°F
Sol: Insoluble
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: 4.88
Fl.P: NA
UEL: NA
LEL: NA

Incompatibilities & Reactivities
Soluble in hydrochloric acid (liberates chlorine gas)
Measurement Methods
NIOSH 7300; OSHA ID121, ID125G
Personal Protection & Sanitation
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 To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Asthenia, insomnia, mental confusion; low-back pain; vomiting; malaise (vague feeling of discomfort), lassitude (weakness, exhaustion); kidney damage; pneumonitis
Target Organs respiratory system, central nervous system, blood, kidneys
See also: INTRODUCTION