ELECTRONIC SPACE PRODUCTS INTERNATIONAL
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MATERIAL SAFETY DATA SHEET
I PRODUCT IDENTIFICATION
Trade Name: Gallium Selenide Chemical Family: Metal Selenide
Synonyms: Gallium monoselenide Formula: GaSe
CAS #: 12024-11-2
II HAZARDOUS INGREDIENTS
Hazardous Component % OSHA PEL ACGIH/TLV
Gallium Selenide 0-100 0.2 mg(Se)/m3 0.2 mg(Se)/m3
HMIS Hazard Rating: Health: 3 Flammability: 0 Reactivity: 0
III PHYSICAL DATA
Boiling Point: N/E or N/A Melting Point: 950 oC - 970 oC
Specific Gravity: 5.03 @ 25 oC % Volatiles: N/A
Vapor Pressure: N/E Solubility in H2O: N/E
Appearance and Odor: Dark red-brown pieces, slight garlic odor.
IV FIRE AND EXPLOSION HAZARDS DATA
Flash Point (Method Used): N/E or 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 Fire Fighting Procedures: Wear a 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 & Explosion Hazard: When heated to decomposition, gallium selenide may emit toxic fumes of selenium.
V HEALTH HAZARD INFORMATION
Effects of Over Exposure:
To the best of our knowledge the chemical, physical and toxicological properties of gallium selenide have not been thoroughly investigated and recorded.
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.
Metallic gallium as well as the nitrate produced no skin injury and subcutaneous injection of relatively large amounts could be tolerated both by rabbits and rats without evidence of injury. It has, however, been demonstrated that gallium remains in the tissues for long periods. (Sax, Dangerous Properties of Industrial Materials)
Acute Effects:
Inhalation: DANGER - POISON. May cause irritation of the respiratory tract and acute selenium poisoning.
Ingestion: DANGER - POISON. May cause gastrointestinal disturbances.
Skin: May cause irritation.
Eye: May cause irritation.
Chronic Effects:
Inhalation: May cause depression of bone marrow function and 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 and be implicated in Alzheimer’s disease.
Skin: May cause dermatitis and depression of bone marrow function.
Eye: May cause visual disturbances and blurred vision.
Route(s) of Entry: Inhalation, skin, and ingestion.
Target Organs: Upper respiratory system, eyes, skin, liver, kidneys and blood.
Medical Conditions Generally Aggravated by Exposure: Pre-existing respiratory and skin disorders.
Carcinogenicity: NTP: No IARC: No OSHA: No
EMERGENCY AND FIRST AID PROCEDURES:
INHALATION: Remove to fresh air, keep warm and quiet, give oxygen if breathing is difficult. Seek medical attention.
INGESTION: Give 1-2 cups of milk or water and do not induce vomiting. Seek medical attention.
SKIN: Remove contaminated clothing, brush material off skin, wash area with soap and water, seek medical attention if symptoms persist.
EYE: Flush eyes with lukewarm water, lifting upper and lower eyelids, for at least 15 minutes. Seek medical attention immediately.
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 the area where the spill occurred, insure proper ventilation is available. Vacuum up the spill using a high efficiency particulate absolute (HEPA) filter and place in a closed container for proper disposal. Take care not to raise dust.
Waste Disposal Method: Dispose of in accordance with applicable Federal, State and Local regulations.
VIII SPECIAL PROTECTION INFORMATION
Respiratory Protection: Wear NIOSH-approved dust-mist-vapor cartridge respirator.
Ventilation: Use local exhaust to maintain exposure below the PEL, TLV. General exhaust is not recommended.
Protective Gloves: Rubber gloves
Eye Protection: Safety glasses
Other Protective Clothing or Equipment: Protective gear suitable to prevent contamination.
IX SPECIAL PRECAUTIONS
Precautions to Be Taken in Handling and Storage: Store in tightly sealed containers in a cool, dry area. Wash hands and face thoroughly after handling.
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
Dated: December 2004