---

Section 1: Product Identification
   Chemical Name:       Tantalum silicide (99.5%-Ta)    
   CAS Registry Number:       12039-79-1    
   Formula:       TaSi2    
   EINECS Number:       234-902-2    
   Chemical Family:       metal silicide    
   Synonym:       Tantalum disilicide    

---

Section 2: Composition and Information on Ingredients
   Ingredient       CAS Number       Percent       ACGIH (TWA)       OSHA (PEL)    
   Title compound       12039-79-1       100%       10mg/m3(Ta)       5mg/m3(Ta)    

---

Section 3: Hazards Identification
   Emergency Overview:       May be irritating to skin, eyes and mucous membranes.    
   Primary Routes of Exposure:       Ingestion, inhalation.    
   Eye Contact:       May cause slight to mild irritation of the eyes.    
   Skin Contact:       May cause slight to mild irritation of the skin.    
   Inhalation:       Do not breathe dust. Dust may be irritating to the nose, mucous membranes and respiratory tract.    
   Ingestion:       No information is available on the physiological effects of ingestion.    
   Acute Health Affects:       Dust may be irritating to the nose, mucous membranes and respiratory tract.    
   Chronic Health Affects:       No information available on long-term chronic effects.    
   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:       dry chemical, carbon dioxide, or foam.    
   If this product is involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure
   Special Fire Fighting Procedures:
   self-contained breathing apparatus and full protective clothing.
   Hazardous Combustion and       If involved in a fire this material may emit irritating dusts.    
   Decomposion Products:
   Unusual Fire or Explosion Hazards: No unusual fire or explosion hazard.

---

SECTION 6: Accidental Release Measures
   Spill and Leak Procedures:       Sweep up the material and dispose of properly.    

---

SECTION 7: Handling and Storage
   Handling and Storage:       Store the material in a sealed container.    

---

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 appropriate chemical resistant gloves and protective clothing.    
   Ventilation:       Material may form a fine dust. If possible, handle the material in an efficient fume hood.    
   If in form of fine dust and ventilation is not available a respirator should be worn. The use of respirators
   Respirator:
   requires a 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 pwdr. (avg. 10 microns or less)    
   Molecular Weight:       237.12    
   Melting Point:       2200°    
   Boiling Point:       no data    
   Vapor Pressure:       not applicable    
   Specific Gravity:       9.14    
   Odor:       none    
   Solubility in Water:       insoluble    

---

SECTION 10: Stability and Reactivity
   Stability:       air and moisture stable    
   Hazardous Polymerization:       No hazardous polymerization.    
   Conditions to Avoid:       formation of a fine dust    
   Incompatibility:       mineral acids    
   Decomposition Products:       none    

---

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):       Title compound not listed.    
   Second Ingredient:       none    

---

SECTION 16 - ADDITIONAL INFORMATION
N/A