Galvanized/Galvannealed Sheet

SECTION 2: Hazards identification

Principle Routes of Exposure

Inhalation Note: Steel products under normal conditions do not present an inhalation, ingestion, contact health or environmental hazard. However, operations such as burning, welding, sawing, brazing, grinding, and possibly machining, etc., which result in elevating the temperature of the product to or above its melting point or result in the generation of airborne particles, may present health hazards. Target Organs: Respiratory System Acute Effects: Inhalation: Excessive exposure to high concentrations of dust may cause irritation to the eyes, skin, and mucous membranes of the upper respiratory tract. Excessive inhalation of fumes of freshly formed metal oxide particles sized below 1.5 microns and usually between 0.02-0.05 microns from many metals can produce an acute reaction known as "metal fume fever". Symptoms consist of chills and fever (very similar to and easily confused with flu symptoms), metallic taste in the mouth, dryness and irritation of the throat followed by weakness and muscle pain. The symptoms come on in a few hours after excessive exposures and usually last from 12 to 48 hours. Long-term effects from metal fume fever have not been noted. Freshly formed oxide fumes of manganese and copper have been associated with causing metal fume fever. 2 | P a g e - Eye: Excessive exposure to high concentrations of dust may cause irritation to the eyes. Particles of iron or iron compounds, which become imbedded in the eye, may cause rust stains unless removed fairly promptly. Touching or burning operations on steel products with oil coatings may produce emissions that can be irritating to the eyes. Skin: Skin contact with dusts may cause irritation or sensitization, possibly leading to dermatitis. Repeated or prolonged contact with oil residue may cause skin irritation, dermatitis or allergic reactions in sensitized individuals. Ingestion: Ingestion of harmful amounts of this product as distributed is unlikely due to its solid insoluble form. Ingestion of dust may cause nausea or vomiting.

Potential chronic health

Chronic inhalation of metallic fumes and dusts are associated with the following conditions: Iron (Iron Oxide): Prolonged or repeated exposure to high concentrations may cause lung changes considered to be a benign pneumoconiosis (siderosis). Inhalation of iron oxide may cause irritation of eyes, nose, and throat, and metal fume fever. Aluminum: Generally considered to be a nuisance particulate. May cause irritation to the upper respiratory tract, skin, and eyes. Inhalation of five particles may cause a pulmonary fibrosis known as Shaver's disease. Symptoms may include dypsnea, cough, and fatigue. May be implicated in Alzheimer's disease. Carbon: Primarily a nuisance dust. May cause mild irritation to the eyes and mucous membranes. Manganese: Exposure may cause irritation of the eyes, nose, and throat, metallic taste in mouth, and metal fume fever. Advanced exposure symptoms may include weakness, sleepiness, nervousness, lack of coordination, uncontrollable laughter, mental confusion, speech disturbance, and aggressiveness. Manganese exposure may cause bronchitis, pneumonitis and central nervous system disturbances. Phosphorous: Inhalation of dusts and fumes of Ferrophosphorus oxides may cause respiratory irritation. Silicon: Primarily a nuisance dust. Silicon may cause mild irritation to the eyes and mucous membranes. Sulfur: Sulfur compounds, present in the fumes, may irritate the skin, eyes, lungs and gastrointestinal tract. 3 | P a g e Coating Oils: Steel coated with any oil may result in a mild skin irritation upon prolonged and repeated contact.

Medical Conditions Generally Aggravated by Exposure

Current respiratory conditions can be aggravated by exposure. Section 3 – Chemical Composition / Information on Ingredients Typical Chemical Compositions and Recommended Occupational Exposure Limit Ingredient CAS No. %WT. OSHA Permissible Exposure ACGIH Name MIN I Max Limit (PEL)1 2 TLV Iron 1309-37-1 97-99 10mg/m"- As Iron Oxide Fume 5mg/m" (fume) Aluminum 7429-90-5 0.020-0.99 5mg/m"- As Respirable Fraction 5mg/m" Jfume) 15 mg/m3 -As Total Dust 1Omg/m' (dust) Carbon 7440-44-0 0.001-1.25 15mgtm• -Total Dust (PNORt 10mgtm• -lnhalable 5mg/m3 -Respirable Fraction (PNOR) Fraction4 (PNOS)5 3mg/m3 -Respirable Fraction6 (PNOS) Manqanese 7439-96-5 0.10-1.25 5mqtm• (C) -Fume & Mn Compounds 0.2 mqtm• Phosphorus 7723-14-0 0.10 max 0.1mg/m -As Yellow Phosphorus 0.1111g/m Silicon 7440-21-3 0.01-1.0 15mg/m"- As Total Dust 10mg/m" 5mq/m3 -Respirable Fraction Sulfur 7446-09-5 0.001-0.10 15mgtm• -Total Dust (PNOR) 10mgtm• -lnhalable Sulfur Oxide 7704-34-9 5mg/m3 -Respirable Fraction (PNOR) Fraction (PNOS) 3mg/m3 -Respirable Fraction (PNOS) Notes: Galvanized sheet surfaces may be chemically treated, as requested by the customer, with trace amounts of chromate solution (Approx. 1-2 mg/ft2 per side or < 0.002% of the total product weight) to prevent humid storage stain Surface may also be treated with small amounts (< 0.05%) of corrosion-inhibiting oil. .All commercial steel products may contain small amounts of various elements in addition to those specified. These small quantities (less than 0.1%) may exist as intentional additions, or as "trace" or "residual" elements that generally originate in the raw materials used. These elements may include: arsenic, boron, chromium, copper, molybdenum, nickel, niobium, nitrogen, tin, titanium, and vanadium. 1 OSHA Permissible Exposure Limits (PELs) are 8-hour TWA (time weighted average) concentrations unless otherwise noted. A ("C") designation denotes a ceiling limit, which should not be exceeded during any part of the working exposures unless otherwise noted. A Short Term Exposure Limit (STEL) is defined as a IS-minute exposure, which should not be exceeded at any time during a workday. 1Threshold Limit Values (fLV) established by the American Conference of Governmental Industrial Hygienists (ACGIH) are 8-hour TWA concentrations unless otherwise noted. 3 PNOR (Particulates Not Otherwise Regulated). All inert or nuisance dusts, whether mineral, inorganic or organic not listed specifically by substance name are covered by the PNOR limit which is the same as the inert or nuisance dust limit of 15mg/m3 for the respirable fraction. 4 Inhalable Fraction. The concentration of inhalable particulate for the application of this TLV is to be determined from the fraction passing a size-selector with the characteristics defined ithe ACGIH TLVs and BEis Appendix D, paragraph A. 5 PNOS (Particulates Not Otherwise Specified). Particulates identified under the PNOS heading are "nuisance dusts" containing no asbestos and <I% crystalline silica. A TWA-TLV of 10 mg/m) for respirable particulate has been recommended. 6 Respirable Fraction. The concentration of respirable dust for the application of this limit is to be determined from the fraction passing a size- selector with the characteristics defined in the ACGIH TLVs and BEis Appendix D, paragraph C. 4 | P a g e