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CAS Number: 12058-18-3
Product Catalog

93-4211
Molybdenum › Molybdenum(IV) selenide (99.9%-Mo)
CAS Number: 12058-18-3
MDL Number: MFCD00014216
Molecular Formula: MoSe2
Molecular Weight: 253.87
Chemical Formula: MoSe2
Color and Form: -325 mesh gray pwdr.
Note:  

Physical Characteristics: melting point > 1200°C, density 6.0

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Download This MSDS
SECTION 1: Product Identification
Chemical Name: Molybdenum (IV) selenide (99.9%-Mo)
Product Number: 93-4211
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
Emergency Overview: Exposure to selenium containing dusts can cause shortness of breath, garlic odor, chills and headache. 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.
Acute Health Effects: May be irritating to skin, eyes, and respiratory tract and cause nausea, vomiting, bloody diarrhea, weakness, chills, headache, and delayed pulmonary edema.
Chronic Health Effects: Prolonged exposure to selenium compounds may cause dermatitis, diarrhea, liver damage, nervous disorders, lameness and loss of vitality.
NTP: No
IARC: No
OSHA: No
SECTION 4: First Aid Measures
Eye Exposure: Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need assistance in keeping their eye lids open. Get immediate medical attention.
Skin Exposure: Wash the affected area with water. Remove contaminated clothes if necessary. Seek medical assistance if irritation persists.
Inhalation: Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty in breathing, coughing, wheezing or pain. In such cases seek immediate medical assistance.
Ingestion: Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce 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.
Special Fire Fighting Procedures: If involved in a fire, fire fighters should be equipped with NIOSH approved positive pressure self-contained breathing apparatus and full protective clothing.
Hazardous Combustion and Decomposion Products: If involved in a fire this material may emit toxic fumes of hydrogen selenide.
Unusual Fire or Explosion Hazards: No unusual fire or explosion hazard.
SECTION 6: Accidental Release Measures
Spill and Leak Procedures: Small spills can be mixed with vermiculite, sodium carbonate or other suitable non combustible adsorbent and 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.
Respirator: If ventilation is not available a respirator should be worn. The use of respirators requires a Respiratory Protection Program to be in compliance with 29 CFR 1910.134.
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°C
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
Third Ingredient: none
SECTION 16: Other Information
Disclaimer: The information herein is believed to be accurate and reliable as of the date compiled. However, Strem Chemicals, Inc. makes no representation, warranty, or guarantee of any kind with respect to the information contained in this document or any use of the product based on this information.
Preparation Date: 1/02/2004
Revision Date: 7/29/2011

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