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 Selenide

Formula:              MnSe

CAS Number:       1313-22-0

II.   HAZARDOUS INGREDIENTS

Hazardous Components:   Manganese Selenide         Selenium Compounds

Percent (%):                     0-100                               0-100

OSHA/PEL:                        5 mg/m³                           0.2 mg/m³

ACGIH/TLV:                       5 mg/m³                          0.2 mg/m³

HMIS Ratings:

Health:             3

Flammability:  0

Reactivity:       0

III.   PHYSICAL DATA

Boiling Point:                  N/E

Melting Point:                 N/E

Specific Gravity:            5.55 g/cc @ 15

Solubility in H₂O:           Insoluble

Appearance and Odor:  Grey powder and pieces; odorless

IV.   FIRE AND EXPLOSION HAZARDS DATA

Flash Point:  N/A

Flammability:  Non-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 selenide may emit toxic fumes of selenium

V.   HEALTH HAZARD INFORMATION

Effects of Exposure:

To the best of our knowledge, the chemical, physical and toxicological properties of manganese selenide 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).

Selenium compounds are poison by inhalation and intravenous routes.  Some selenium compounds are experimental carcinogens.  Long-term exposure may be a cause of amyotrophic lateral sclerosis in humans, just as it may cause "blind staggers" in cattle.  Elemental selenium has low acute systemic toxicity, but dust or fumes can  cause serious irritation of the respiratory tract.  Inorganic selenium compounds can cause dermatitis.  Garlic odor of breath is a common symptom.  Pallor, nervousness, depression, digestive disturbances and death have been reported in cases of chronic exposure (Sax, Dangerous Properties of Industrial Materials).

Acute Effects:

Inhalation:  DANGER-POISON.  May cause irritation of the respiratory tract and mucous membranes and acute selenium poisoning.  Inhalation of manganese compounds fine dusts and fumes may cause metal fume fever.

Ingestion:  DANGER-POISON.  May cause gastrointestinal disturbances.

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.  May cause manganism - psychic and neurological disorders affecting the central nervous system - to develop (manganism is not fatal but, can cause permanent disability).  May cause chronic selenium poisoning.  Continued intoxication may cause loss of nails and hair, hemolytic anemia, and kidney, liver and spleen damage.

Ingestion: May cause chronic selenium toxicity.

Skin:  May cause dermatitis. 

Eye:  Irritant dusts may cause conjunctivitis damage.

Routes of Entry:  Inhalation

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

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 and 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:  Fumes of Selenium

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.  Isolate spill area and provide ventilation.  Scoop or 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, mist, vapor cartridge respirator.

Ventilation:  Handle under argon in a controlled, enclosed process.  Use local exhaust to maintain concentration of exposure 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.

Other Precautions:  Moisture sensitive.  Handle and store under argon.

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.

TSCA Listed:                      Yes

DOT Regulations:

Hazard Class:                    6.1

Identification Number:     UN3283

Packing Group:                 III

Proper Shipping Name:    Selenium compound, solid, n.o.s., (Manganese Selenide)

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:                    March 2008