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 Tungstate

Formula:              MnWO₄

CAS Number:       14177-46-9

II.   HAZARDOUS INGREDIENTS

Hazardous Components:  Manganese Tungstate

Percent (%):                    0-100

OSHA/PEL:                       5 mg(Mn)/m³

ACGIH/TLV:                     0.2 mg(Mn)/m³

III.   PHYSICAL DATA

Boiling Point:                  N/E

Melting Point:                 N/E

Specific Gravity:            7.234 g/cc

Solubility in H₂O:           Insoluble

Appearance and Odor:  Yellow powder and pieces; no odor

IV.   FIRE AND EXPLOSION HAZARDS DATA

Flash Point:  N/A

Flammability:  Not flammable

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

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

Special Firefighting Procedures:  Firefighters must wear full face, self-contained breathing apparatus with full protective clothing to prevent contact with skin and eyes.  Fumes from fire are hazardous.  Isolate runoff to prevent environmental pollution.

Unusual Fire and Explosion Hazards:  When heated to decomposition manganese tungstate 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 tungstate have not been thoroughly investigated and recorded.

Some manganese compounds are experimental tumorigens.  They can cause central nervous and pulmonary system damage by inhalation of fumes and dust.  Very few poisonings have occurred from ingestion.  Chronic manganese poisoning is a clearly characterized disease which results from inhalation of fumes or dusts of manganese.  The central nervous system is the chief site of damage.  Exposure to dusts and fumes can possibly increase the incidence of upper respiratory infections and pneumonia (Sax, Dangerous Properties of Industrial Materials, eighth Ed.).

Tungsten compounds are considered somewhat more toxic than those of molybdenum.  However, industrially, this element does not constitute an important health hazard.  Heavy exposure to the dust or the ingestion of large amounts of the soluble compounds produces changes in body weight, behavior, blood cells, choline esterase activity and sperm in experimental animals.  (Sax, Dangerous Properties of Industrial Materials, eighth edition)

Acute Effects:

Inhalation:  Inhalation of manganese compounds is considered the primary route of exposure.  It 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:  May cause irritation.

Eye:  May cause 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.  However, dust particles approximately 5 um in size, inhaled for about 4 hours daily for three months did not produce pneumonitis, but may cause fibrotic changes in the lungs, decrease in hemoglobin and a change in erythrocyte levels.  Manganese compounds may also cause manganism, psychic and neurological disorders affecting the central nervous system, to develop (manganism is not fatal but can cause permanent disability).

Ingestion:  No chronic health effects recorded.

Skin:  May cause dermatitis.

Eye:  Irritant dusts may cause conjunctivitis damage.

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

Medical Conditions Generally Aggravated by Exposure:  Pre-existing respiratory disorders. 

Carcinogenicity:  NTP:  No      IARC:  No      OSHA:  No

EMERGENCY AND FIRST AID PROCEDURES:

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

INGESTION:  Give 1-2 glasses of milk or water and induce vomiting, keep warm and quiet, seek medical attention.  Never give anything by mouth or induce vomiting in an unconscious person.

SKIN:  Remove contaminated clothing, brush material off skin, wash affected area with mild soap and water.  Seek medical attention if symptoms persist.

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

VI.   REACTIVITY DATA

Stability:  Stable

Conditions to Avoid:  None

Incompatibility (Material to Avoid):  None recorded

Hazardous Decomposition Products:  Metal oxide fumes.

Hazardous Polymerization:  Will not occur

VII.   SPILL OR LEAK PROCEDURES

Steps to Be Taken in Case Material Is Released or Spilled:  Wear appropriate respiratory and protective equipment specified in Section VIII - Special Protection Information.  Isolate spill area and provide ventilation.  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:  NIOSH-approved dust respirator.

Ventilation:  Handle in a controlled, enclosed process.  Use local exhaust to maintain concentrations at or below PEL, TLV.  General exhaust is not recommended.

Protective Gloves:  Rubber

Eye Protection:  Safety glasses

Other Protective Clothing:  Protective gear suitable to prevent contamination.

IX.   SPECIAL PRECAUTIONS

Precautions to Be Taken in Handling and Storage:  Store in a cool, dry area.  Store in tightly sealed container.  Wash thoroughly after handling.  Handle and store in a controlled environment.

Work Practices:  Implement engineering and work practice controls to reduce and maintain concentration of exposure at low levels.  Use good housekeeping and sanitation practices.  Handle in a controlled, inert atmosphere.  Minimize exposure by using local exhaust and an enclosing process if/when possible.  Do not use tobacco or food in the work area.  Wash thoroughly before eating and smoking.  Shower and change clothes at the end of work shift.  Do not blow dust off clothing or skin with compressed air.  Maintain eyewash capable of sustained flushing, safety drench shower and facilities for washing.

TSCA Listed:         Yes

DOT Regulations:

Hazard Class:      None

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:                    April 2008