ESPI Metals

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Product Name:     Sapphire

Formula:              A12O3

CAS Number:       1344-28-1




Hazardous Component:  Aluminum Oxide

Percent (%):                   0-100      

OSHA/PEL:                      15 mg/m3 (dust), 5 mg/m3 (resp)

ACGIH/TLV:                     10 mg/m3

HMIS Ratings:

Health:                            0

Flammability:                 0

Reactivity:                      0




Boiling Point:                   2920-3040 oC

Melting Point:                  2000-2030 oC

Specific Gravity:             3.97 g/cc                                               

Solubility in H2O:            0.0098 g/l at 29 oC                

Appearance and Odor:   White to clear with no odor.             




Flash Point:  N/A

Autoignition Temperature:  N/E or N/A

Flammable LimitsUpper:  N/A       Lower:  N/A

Extinguishing Media:  Do not use halogenated extinguisher.  Use extinguishing media for surrounding materials and type of fire.

Special Fire Fighting Procedures:  Firefighters must wear full face, self-contained breathing apparatus with full protective clothing to prevent contact with skin and eyes.

Unusual Fire & Explosion Hazard:  Aluminum oxide may have an exothermic reaction, above 200 oC, with halocarbon vapors and may produce toxic hydrochloric acid and phosgene.




Effects of Over Exposure:

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

Aluminum may be implicated in Alzheimers disease. Inhalation of aluminum containing dusts may cause pulmonary disease.  Aluminum oxide has caused tumors and neoplasms in experimental animals via implant.

Aluminum compounds have many commercial uses and are commonly found in industry.  Many of these materials are active chemically and thus exhibit dangerous toxic and reactive properties.  Inhalation of fine aluminum oxide particles is associated with shaver's disease.  (Sax, Dangerous Properties of Industrial Materials, eighth edition)

Acute Effects:

Inhalation:  Dust may cause irritation of the nose throat, accompanied by cough and discomfort.  Dust may cause upper respiratory tract irritation with discomfort of nose and throat.  Aluminum oxide does not cause pneumonoconiosis in man.

Ingestion:  No acute health effects recorded.

Skin:  No acute health effects recorded.

Eye:   Dust may cause eye irritation.

Chronic Effects:

Inhalation:  Inhalation of finely divided dust may cause lung damage affecting breathing capacity.  No other chronic health effects recorded.

Medical Conditions Aggravated By Overexposure:  Pre-existing respiratory disorders.

CarcinogenicityNTP:  No      IARC:  No     OSHA:  No



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



EYES:  Flush with lukewarm water, lifting upper and lower eyelids, for at least 15 minutes.  Seek medical attention if symptoms persist




Stability:  Stable

Conditions to Avoid:  Exothermic reaction with water.

Incompatibility (Material to Avoid):  Ethylene oxide, chlorine trifluoride, acids, bases, oxidizing agents, interhalogens, halocarbons.

Hazardous Decomposition Products:  Metal oxide fume, aluminum, hydrochloric acid and phosgene.

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.  Vacuum up spill using a high efficiency particulate absolute (HEPA) air filter and place in a closed container for proper disposal.  Take care not to raise dust.

Waste Disposal Method:  In accordance with Local, State and Federal waste disposal regulations.




Respiratory Protection:  If excessive dusting, wear NIOSH or MSHA approved respirator.

Ventilation:  Use local exhaust to maintain concentration at low exposure levels.  General exhaust is not recommended.

Protective Gloves:  Impervious gloves

Eye Protection:  Safety Glasses

Other Protective EquipmentNormal Lab Wear




Precautions to be taken in Handling and Storing:  Store in cool, dry place in tightly closed containers.  When machining product, avoid dusting and use with adequate ventilation.  Do not take internally.  Wash thoroughly after handling.  Do not breathe dust, vapor, mist, or gas.

Other Handling and Storage Conditions:  Do not store together with acids.  Do not store together with alkalies (caustic solutions).  Store away from oxidizing agents.

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.

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 damages resulting from handling or from contact with the above product.


Issued by:                           S. Dierks

Revised/Verified:                 October 2009

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ESPI was incorporated in 1950 with a mission to provide a competitive source for high purity metals, metal compounds and alloys. We are a valuable resource for virtually all major universities worldwide, global corporate R&D laboratories, thousands of domestic and international manufacturing companies and all U.S. government research laboratories. ESPI offers unique advantages often unavailable from larger organizations with no minimum order size & all business hour calls are handled by a competent sales representative. Automated answering systems and voice mail are not an option at ESPI.

Located within our fabrication facility is the melting department, forging & shaping areas, and the rod & wire, and sheet & foil departments providing the following manufacturing capabilities:

  • Casting of pure metals and alloys
  • Vacuum arc melting
  • Induction melting
  • Rod and wire drawing/extrusion
  • Sheet, foil and ribbon rolling
  • CNC milling and machining

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ESPI produces and sells 68 elements and dozens of alloys in various forms for your custom needs. Click on the forms below to be directed to detailed information on manufacturing.



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