# NIOSH Pocket Guide to Chemical Hazards
Emery | CAS 1302-74-5 (corundum)
Al2O3 | RTECS GN0231000 (corundum)
Synonyms & Trade Names Aluminum oxide, Aluminum trioxide, Corundum, Impure corundum, Natural aluminum oxide [Note: Emery is an impure variety of Al2O3 which may contain small impurities of iron, magnesium & silica Corundum is natural Al2O | 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 Odorless, white, crystalline powder.
See alpha-Alumina for physical & chemical properties. |  |  |
Incompatibilities & Reactivities
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 Breathing: Fresh air Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION