Section 1: Product Identification
Chemical Name: Molybdenum (IV) selenide (99.9%-Mo)
CAS Registry Number: 12058-18-3
Formula: MoSe2
EINECS Number: 235-027-9
Chemical Family: metal chalcogenides
Synonym: Molybdenum diselenide
Section 2: Composition and Information on Ingredients
Ingredient CAS Number Percent ACGIH (TWA) OSHA (PEL)
Title compound 12058-18-3 100% 10mg/m3( as Mo) 15mg/m3 (as Mo)
Section 3: Hazards Identification
Exposure to selenium containing dusts can cause shortness of breath, garlic odor, chills and headache.
Emergency Overview:
Chronic exposure may result in nervous disorders, dermatitis, liver and kidney disease.
Primary Routes of Exposure: Ingestion, inhalation.
Eye Contact: May cause mild to moderate irritation of the eyes.
Skin Contact: May cause irritation of the skin, and upon repeated contact, dermatitis.
Inhalation: Dust may cause garlic odor, shortness of breath, chills, headache, and delayed pulmonary edema.
Ingestion: Ingestion may lead to nausea, vomiting, bloody diarrhea, weakness and chronic diseases.
May be irritating to skin, eyes, and respiratory tract and cause nausea, vomiting, bloody diarrhea, weakness,
Acute Health Affects:
chills, headache, and delayed pulmonary edema.
Prolonged exposure to selenium compounds may cause dermatitis, diarrhea, liver damage, nervous disorders,
Chronic Health Affects:
lameness and loss of vitality.
NTP: No
IARC: No
OSHA: No
SECTION 4: First Aid Measures
Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need
Eye Exposure:
assistance in keeping their eye lids open. Get immediate medical attention.
Wash the affected area with water. Remove contaminated clothes if necessary. Seek medical assistance if
Skin Exposure:
irritation persists.
Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty in
Inhalation:
breathing, coughing, wheezing or pain. In such cases seek immediate medical assistance.
Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce
Ingestion:
vomiting only if directed by medical personnel.
SECTION 5: Fire Fighting Measures
Flash Point: no data
Autoignition Temperature: no data
Explosion Limits: no data
Extinguishing Medium: carbon dioxide, dry powder or foam.
If involved in a fire, fire fighters should be equipped with NIOSH approved positive pressure self-contained
Special Fire Fighting Procedures:
breathing apparatus and full protective clothing.
Hazardous Combustion and If involved in a fire this material may emit toxic fumes of hydrogen selenide.
Decomposion Products:
Unusual Fire or Explosion Hazards: No unusual fire or explosion hazard.
SECTION 6: Accidental Release Measures
Small spills can be mixed with vermiculite, sodium carbonate or other suitable non combustible adsorbent and
Spill and Leak Procedures:
swept up.
SECTION 7: Handling and Storage
Handling and Storage: No special precautions needed in handling and storage..
SECTION 8: Exposure Controls and Personal Protection
Eye Protection: Always wear approved safety glasses when handling a chemical substance in the laboratory.
Skin Protection: Wear protective clothing and gloves. Consult with glove manufacturer to determine the proper type of glove.
Ventilation: Material may form a fine dust. If possible, handle the material in an efficient fume hood.
If ventilation is not available a respirator should be worn. The use of respirators requires a Respiratory
Respirator:
Protection Program to be in compliance with 29 CFR 1910.134.
Ventilation: Material may form a fine dust. If possible, handle the material in an efficient fume hood.
Additional Protection: No additional protection required.
SECTION 9: Physical and Chemical Properties
Color and Form: -325 mesh gray powder
Molecular Weight: 253.87
Melting Point: >1200°
Boiling Point: no data
Vapor Pressure: no data
Specific Gravity: 6
Odor: none
Solubility in Water: insoluble
SECTION 10: Stability and Reactivity
Stability: air and moisture stable.
Hazardous Polymerization: No hazardous polymerization.
Conditions to Avoid: Mineral acids may form toxic hydrogen selenide vapors
Incompatibility: mineral acids
Decomposition Products: selenium oxide and molybdenum oxide
SECTION 11: Toxicological Information
RTECS Data: No information available in the RTECS files.
Carcinogenic Effects: no data
Mutagenic Effects: no data
Tetratogenic Effects: no data
SECTION 12: Ecological Information
Ecological Information: No information available
SECTION 13: Disposal Considerations
Disposal: Dispose of according to local, state and federal regulations.
SECTION 14: Transportation
Shipping Name (CFR): Non-hazardous
Hazard Class (CFR): NA
Additional Hazard Class (CFR): NA
Packaging Group (CFR): NA
UN ID Number (CFR): NA
Shipping Name (IATA): Non-hazardous
Hazard Class (IATA): NA
Additional Hazard Class (IATA): NA
Packaging Group (IATA): NA
UN ID Number (IATA): NA
SECTION 15: Regulatory Information
TSCA: Listed in the TSCA inventory.
SARA (Title 313): See category Code N725 for reporting.
Second Ingredient: none
SECTION 16 - ADDITIONAL INFORMATION
N/A
