Manganous oxide

  • Manganese protoxide
  • Manganese(II) oxide
  • Manganese monooxide
  • Manganese monoxide
  • Manganese oxide
Formula
MnO
Structure
Description
Green cubic crystals or powder.
Uses
Textile printing, analytical chemistry, catalyst in manufacture of allyl alcohol, ceramics, paints, colored glass, bleaching tallow, animal feeds, fertilizers, food additive and dietary supplement.

Registry Numbers and Inventories.
CAS
1344-43-0
EC (EINECS/ELINCS)
215-695-8
RTECS
OP0900000
RTECS class
Other
Beilstein/Gmelin
13724 (G)
Swiss Giftliste 1
G-7902
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
MnO
Formula mass
70.93
Melting point, °C
1840
Density
5.43 g/cm3
Solubility in water
insoluble
Thermal expansion
1E-05/K
Heat of fusion
43.9 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Store in a cool, dry location.
Handling
Do not breath dust. Avoid contact with eyes, skin and clothing. Avoid prolonged or repeated exposure. Use only in a chemical fume hood.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
NIOSH approved respirator.
Small spills/leaks
Wear approved safety equipment. Sweep up and place in a bag to hold for wast disposal. Avoid raising a dust. Ventilate area. Wash stpill site.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
None reported.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Fire potential
Non combustible

Health.
Exposure limit(s)
IDHL: 500 mg/m3
Poison_Class
4
Exposure effects
Effects include a parkinsonism-like syndrome, muscle weakness, impairment of speech, gait disturbances, tremor, slurred speech, diminished libido and behavioral disturbances. Symptoms may last 1 to 2 months or longer. Manganese injection has produced teratogenic effects in experimental animals, although ingestion and inhalation studies showed no effect. Manganese deficiency during gestation has demonstrated adverse effects on the central nervous system of the developing fetus in experimental animals.
   Ingestion
Non-specific GI effects may occur including anorexia, constipation or diarrhea, nausea, vomiting, and abdominal pain.
   Inhalation
Pleuritis and/or severe or fatal pneumonia have been reported among manganese workers.
   Skin
Causes irritation. Hives may rarely occur.
   Eyes
Causes irritation.

First aid
 
   Ingestion
Most exposures to manganese are chronic. Emesis and activated charcoal may not be useful in chronic cases. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
No serious ocular toxicity has been reported from metal fume fever.

Transport.