International Chemical Safety Cards MAGNESIUM (POWDER) ICSC: 0289 Mg Atomic mass: 24.30 ICSC #    0289 CAS #     7439-95-4 RTECS # OM2100000 UN #        1418 EC #         012-001-00-3 (pyrophoric) April 12, 2000 Peer reviewe TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames, NO sparks, and NO smoking. NO contact with moisture, acids, halogens and many other substances. Special powder, dry sand, NO other agents. NO water. EXPLOSION Finely dispersed particles form explosive mixtures in air. Do NOT expose to friction or shock. Prevent build-up of electrostatic charges (e.g., by grounding). EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Cough. Laboured breathing. Headache. Dullness. Weakness. Fever or elevated body temperature.  •SKIN  •EYES Redness. Pain. Safety goggles.  •INGESTION Abdominal pain. Diarrhoea. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Do NOT wash away into sewer. Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place. (Extra personal protection: P2 filter respirator for harmful particles). Fireproof. Separated from strong oxidants, acids. Dry. Airtight. F symbol R: 15-17 S: 2-7/8-43 UN Hazard Class: 4.3 UN Subsidiary Risks: 4.2 UN Packing Group: ll SEE IMPORTANT INFORMATION ON BACK ICSC: 0289 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards MAGNESIUM (POWDER) ICSC: 0289 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: GREY POWDER PHYSICAL DANGERS: Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc. CHEMICAL DANGERS: The substance may spontaneously ignite on contact with air or moisture producing irritating or toxic fumes . Reacts violently with strong oxidants. Reacts violently with many substances causing fire and explosion hazard. Reacts with acids and water forming flammable hydrogen gas (see ICSC0001), causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. EFFECTS OF SHORT-TERM EXPOSURE: Inhalation of fumes may cause metal fume fever. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 1100°C Melting point: 651°C Density: 1.7 g/cm3 Solubility in water: none Auto-ignition temperature: 473°C Explosive limits, vol% in air: see Notes ENVIRONMENTAL DATA N O T E S Burns with an intense flame. In order to prevent eye injury do not look directly at magnesium fires. Reacts violently with fire extinguishing agents such as water , carbon dioxide and powder . Explosive limits, vol% in air: (LEL) 0.03 kg/m3. Transport Emergency Card: TEC (R)-43G12 NFPA Code: H0; F1; R2; ADDITIONAL INFORMATION ICSC: 0289 MAGNESIUM (POWDER) (C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.