(SEE SUPPL)

SECTION 2: Hazards identification

= Routes of Entry: Inhalation:YES Skin:NO Ingestion:NO Reports of Carcinogenicity:NTP: YES IARC: YES

Acute Health Hazards

and Chronic:ALUMINUM IS CONSIDERED A NUISANCE PARTICULATE. WELDING OR MACHINING ALUMINUM MAY GENERATE DUSTS AND FUMES WHICH MAY CAUSE EYE, NOSE, AND THROAT IRRITATION. SOME WELDING OPERATIONS ON THESE ALLOYS MAY LIBERATE SUFFICIENT COPPER FUME TO EXCEED THE EXPOSURE LIMIT. INHALATION OF EXCESS COPPER FUMES MAY CAUSE IRRITATION OF THE RESPIRATORY TRACT AND METAL FUME FEVER. OZONE MAY BE EMITTED AS A BY-PRODUC T DURING WELDING OR PLASMA ARC CUTTING. EXPOSURE TO OZONE MAY PRODUCE IRRITATION TO EYES, NOSE, & THROAT. WELDING &/OR PLASMA ARC CUTTING OF AL CAN CAUSE SKIN BURNS OR WELDERS FLASH TO SKIN & EYES. Explanation of Carcinogenicity:NICKEL, CHROMIUM AND CERTAIN OF THEIR COMPOUNDS ARE CLASSIFIED AS CARCINOGENS IN THE LATEST ANNUAL REPORT ON CARCINOGENS AS PUBLISHED BY THE NATIONAL TOXICOLOGY PROGRAM (NTP) AND BY THE INTERNATIONAL AGENCY FOR RESEARCH ON CANCER (TARC). Effects of Overexposure:SYMPTOMS OF METAL FUME FEVER INCLUDE CHILLS, FEVER, NAUSEA, CHEST TIGHTNESS, OR METALLIC TASTE. PROLONGED EXPOSURE TO OZONE MAY RESULT IN NAUSEA, HEADACHE, AND PULMONARY DAMAGE. Medical Cond Aggravated by Exposure:PRE-EXISTING UPPER RESPIRATORY AND LUNG DISEASES SUCH AS, BUT NOT LIMITED TO, BRONCHITIS, EMPHYSEMA, ASTHMA, AND WILSON'S DISEASE.