MATERIAL SAFETY DATA SHEET

I.   PRODUCT IDENTIFICATION

Manufacturer/Supplier:

ESPI Metals

1050 Benson Way, Ashland, OR 97520

Toll Free (800) 638-2581 * Fax (541) 488-8313

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Product Name:     Manganese Oxide

Formula:               Mn₃O₄ (plus MnO)

CAS Number:        1317-35-7

II.   HAZARDOUS INGREDIENTS

Hazardous Components:  Manganese Oxide

Percent (%):                     0-100

OSHA PEL:                        1mg (Mn)/m³

ACGIH TLV:                       1 mg (Mn)/m³

III.   PHYSICAL DATA

Boiling Point:                   N/E or N/A

Melting Point:                  1564 ^oC

Specific Gravity:               4.856 g/cc

Solubility in H₂O:             Insoluble

Appearance and Odor:     Black crystalline powder and pieces, no odor.

IV.   FIRE AND EXPLOSION HAZARDS DATA

Flash Point (Method Used):  N/A

Autoignition Temperature:  N/E

Flammable Limits:  Upper:  N/A     Lower:  N/A

Extinguishing Media:  Use suitable extinguishing media for surrounding material and type of fire.

Special Fire Fighting Procedures:  Wear NIOSH/MSHA approved self contained breathing apparatus, protective clothing, boots and gloves.  If without risk, remove material from fire area.

Unusual Fire & Explosion Hazards:  When heated to decomposition this material may emit toxic fumes.

V.   HEALTH HAZARD INFORMATION

Effects of Exposure:

To the best of our knowledge the chemical, physical and toxicological properties of manganese oxide have not been thoroughly investigated and reported.

Acute Effects:

Inhalation:  Inhalation of manganese compounds is considered the primary route of exposure, they may cause irritation of the respiratory tract and mucous membranes.  Inhalation of manganese compounds’ fine dusts and fumes may cause metal fume fever.

Ingestion:  Absorption of manganese compounds from the gastrointestinal tract is poor under normal conditions.

Skin:  Absorption by skin is poor.

Eye:  May cause moderate irritation.

Chronic Effects:

Inhalation:  Chronic inhalation of manganese compounds’ dust particles, approximately 3 um in size, for a period of a few months may cause pulmonary pneumonitis.  Manganese compounds may also cause manganism, psychic and neurological disorders affecting the central nervous system, to develop (not fatal but can cause permanent disability).

Ingestion:  No chronic effects recorded.

Skin:  No chronic effects recorded.

Eye:  No chronic effects recorded.

Routes of Entry:  Inhalation

Target Organs:  May affect the central nervous system, kidneys, respiratory system and liver.

Medical Conditions Generally Aggravated By Exposure:  It has been recorded that when exposed to manganese dust and fumes, there is a higher incidence of upper respiratory infection and pneumonia compared to general population.

Carcinogenicity:  NTP:  No     IARC Monographs:  No     OSHA Regulated:  No

EMERGENCY AND FIRST AID PROCEDURES:

INHALATION:  Remove victim to fresh air; keep warm and quiet; give oxygen if breathing is difficult and seek medical attention immediately.

INGESTION:  Give 1-2 glasses of water or milk and induce vomiting; seek medical attention.  Never induce vomiting or give anything by mouth to an unconscious person.

SKIN:  Remove contaminated clothing; brush material off skin; wash affected area with soap and water.  Seek medical attention.

EYE:  Flush eyes with lukewarm water, lifting upper and lower eyelids, for at least 15 minutes.  Seek medical attention.

VI.   REACTIVITY DATA

Stability:  Stable

Incompatibility (Material to Avoid):  Easily oxidized materials and reducing agents.

Hazardous Decomposition Products:  Manganese oxide fume.

Hazardous Polymerization:  Will not occur

VII.   SPILL OR LEAK PROCEDURES

Steps to Be Taken in Case Material Is Released or Spilled:  Wearing suitable respiratory protection and protective clothing.  Isolate spill area, provide ventilation and extinguish sources of ignition.  Vacuum up spill using a high efficiency particulate absolute (HEPA) air filter and place in a closed container for proper disposal.  Take care not to raise dust.

Waste Disposal Method:  Dispose of in accordance with Local, State and Federal regulations.

VIII.   SPECIAL PROTECTION INFORMATION

Respiratory Protection (Specify Type):  NIOSH/MSHA approved dust respirator.

Ventilation:  Use local exhaust to maintain concentration at or below the PEL, TLV.  Mechanical exhaust is not recommended.

Eye Protection:  Safety glasses

Protective Gloves:  Rubber gloves

Other Protective Equipment:  For long periods of exposure, wear protective clothing.

IX.   SPECIAL PRECAUTIONS

Precautions to Be Taken in Handling and Storage:  Keep container tightly sealed.  Store in cool, dry place in tightly closed containers.  Ensure good ventilation at the workplace.  Store away from oxidizers.

Other Precautions:  Avoid breathing dust and use adequate ventilation.

Work Practices:  Implement engineering and work practice controls to reduce and maintain concentration of exposure at low levels.  Use good housekeeping and sanitation practices.  Do not use tobacco or food in work area.  Wash thoroughly before eating and smoking.  Do not blow dust off clothing or skin with compressed air.  Maintain eyewash capable of sustained flushing, safety drench shower and facilities for washing.

The above information is believed to be correct, but does not purport to be all inclusive and shall be used only as a guide.  ESPI shall not be held liable for any damage resulting from handling or from contact with the above product.

Issued By:             S. Dierks

Date:                    October 2003