September 2010
NIOSH Publication Number 2010-168c

alpha-Alumina

Synonyms & Trade Names
Alumina, Aluminum oxide, Aluminum trioxide [Note: α-Alumina is the main component of technical grade alumina. Corundum is natural Al2O3. Emery is an impure crystalline variety of Al2O3.]
CAS No.
1344-28-1
RTECS No.
BD1200000
DOT ID & Guide
Formula
Al2O3
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: See Appendix D
OSHA PEL
†: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
Measurement Methods

NIOSH ID198SG
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.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
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

Not available.

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0351