NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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. See: IDLH INDEX
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, 7301, 7303, 9102; OSHA ID121, ID125G
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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.
Important additional information about respirator selection
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   See MEDICAL TESTS: 0131