# NIOSH Pocket Guide to Chemical Hazards
alpha-Alumina | CAS 1344-28-1
Al2O3 | RTECS BD1200000
Synonyms & Trade Names Alumina, Aluminum oxide, Aluminum trioxide [Note: alpha-Alumina is the main component of technical grade alumina. Corundum is natural Al2O3. Emery is an impure crystalline variety of Al2O3.] | DOT ID & Guide
Exposure Limits | NIOSH REL: See Appendix D
OSHA PEL†: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
IDLH N.D. | Conversion
Physical Description White, odorless, crystalline powder.
MW: 101.9 | BP: 5396°F | MLT: 3632°F | Sol: Insoluble
VP: 0 mmHg (approx) | IP: NA |  | Sp.Gr: 4.0
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible solid, but dusts may form explosive mixtures in air.
Incompatibilities & Reactivities Chlorine trifluoride, hot chlorinated rubber, acids, oxidizers [Note: Hydrogen gas may be formed when finely divided iron contacts moisture during crushing & milling operations.]
Measurement Methods NIOSH 0500, 0600
Personal Protection & Sanitation Skin: No recommendation Eyes: No recommendation Wash skin: No recommendation Remove: No recommendation Change: No recommendation | First Aid (See procedures) Eye: Irrigate immediately Skin: Blot/brush away Breathing: Fresh air Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes Irritation eyes, skin, respiratory system
Symptoms irritation eyes, skin, respiratory system
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION