Titanium Silicide Ti5Si3









ESPI Metals

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Product Name:     Titanium Silicide

Formula:              Ti5Si3

CAS Number:       12067-57-1




Hazardous Component:    Titanium Silicide

Percent (%):                    0-100

OSHA/PEL:                        N/E

ACGIH/TLV:                       N/E

HMIS Ratings (Powder):

Health:                             1

Flammability:                  1

Reactivity:                       1




Boiling Point:                    N/E

Melting Point:                   2130 oC

Specific Gravity:              4.36 g/cc

Solubility in H2O:             Insoluble

Appearance and Odor:    Grey to black powder, no odor.




Flash Point:  N/A

Autoignition Temperature:  N/A

Flammable LimitsUpper:  N/A       Lower:  N/A

Extinguishing Media:  Use extinguishing powder.  Do not use water.

Special Fire Fighting 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 & Explosion:  When heated to decomposition, titanium silicide may emit toxic fumes.  Contact with acids can generate toxic and flammable gases.




Effects of Exposure:

To the best of our knowledge the chemical, physical and toxicological properties of titanium silicide have not been thoroughly investigated and reported.

Titanium and its compounds are generally considered to be physiologically inert.  There are no reported cases in the literature where titanium as such has caused human intoxication.  The dusts of most titanium compounds such as titanium oxide may be placed in the nuisance category.  (Sax, Dangerous Properties of Industrial Materials)

Inorganic silicon compounds may be acute inhalation irritants.  Prolonged inhalation may cause pulmonary fibrosis known as silicosis.

Acute Effects:

Inhalation:  Inhalation may cause irritation to the lungs and respiratory tract.

Ingestion:  Relatively non-toxic, poorly absorbed from the alimentary tract.

Skin:  May cause abrasive irritation.

Eye:  May cause abrasive irritation.

Chronic Effects:

Inhalation:  Prolonged inhalation may cause pulmonary fibrosis known as silicosis.  No other chronic effects recorded.

Target Organs:  No target organs recorded.

Medical Conditions Generally Aggravated by Exposure:  None recorded

CarcinogenicityNTP:  No     IARC:  No    OSHA:  No



INHALATION:  Remove to fresh air, keep warm and quiet, give oxygen if breathing is difficult and seek medical attention if symptoms persist.

INGESTION:  Give 1-2 glasses of milk or water and induce vomiting.  Never induce vomiting or give anything by mouth to 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.




Stability:  Stable

Conditions to Avoid:  None

Incompatibility (Material to Avoid):  Acids, halogens, halocarbons

Hazardous Decomposition Products:  Metal oxide fume

Hazardous Polymerization:  Will not occur




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.  Avoid sources of ignition.  Vacuum up spill using a high efficiency particulate absolute (HEPA) filter and place in a closed container for proper disposal.  Take care not to raise dust.  Do not flush with water or aqueous cleaning agents.

Waste Disposal Method:  Dispose of in accordance with all Federal, State, and Local regulations.




Respiratory Protection:  NIOSH approved dust-mist-vapor respirator.

Ventilation:  Use local exhaust to maintain concentration at low exposure levels.  General exhaust is recommended.

Protective Gloves:  Impervious gloves

Eye Protection:  Safety goggles

Other Protective Equipment:  Protective gear suitable to prevent contamination.




Precautions to Be Taken in Handling and Storage:  Store in cool, dry conditions in well sealed containers.  Keep container tightly sealed.  Wash thoroughly after use.

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 or 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:      None



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

Revised/Verified:                  March 2010

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