Agent Name |
Manganese tetroxide |
CAS Number |
1317-35-7 |
Formula |
Mn3-O4 |
Major Category |
Metals |
Synonyms |
Manganese oxide; Manganomanganic oxide; Trimanganese tetraoxide; Trimanganese tetroxide; [NIOSH] |
Category |
Metals, Inorganic Compounds |
Description |
Brownish-black powder. [Note: Fumes are generated whenever manganese oxides are heated strongly in air.] [NIOSH] |
Sources/Uses |
Generated in ferromanganese fume during the pouring of molten ferromanganese alloys; [ACGIH] |
Comments |
Pneumonitis has been observed in animals exposed to high concentrations. Chronic manganese poisoning has been reported in workers in steel production exposed to ferromanganese dust or fumes in crushing/screening and pouring/casting operations. [ACGIH] There is limited positive data that manganese can cause decreased libido and impotence in humans and limited positive and negative data that it can cause testicular damage in animals. [ATSDR Case Studies # 29] |
Exposure Assessment |
Skin Designation (ACGIH) |
No |
Bioaccumulates |
Yes |
TLV (ACGIH) |
0.2 mg/m3, as Mn |
PEL (OSHA) | Ceiling(OSHA) = 5 mg/m3, as Mn |
MAK |
0.5 mg/m3, as Mn, inhalable fraction |
Adverse Effects |
Toxic Pneumonitis |
Yes |
Neurotoxin |
Parkinson's Syndrome |
Reproductive Toxin |
Yes |
Links to Other NLM Databases |
Health Studies |
Human Health Effects from Hazardous Substances Data Bank: MANGANOUS OXIDE
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