International Chemical Safety Cards TUNGSTEN (powder) ICSC: 1404 W Atomic mass: 183.8 ICSC #    1404 CAS #     7440-33-7 RTECS # YO7175000 UN #        3189 October 17, 2001 Peer reviewe TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE In finely divided form highly flammable. NO open flames, NO sparks, and NO smoking. In case of fire in the surroundings: use appropriate extinguishing media. EXPLOSION In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Cough. Sore throat. Local exhaust. Fresh air, rest.  •SKIN Redness. Protective gloves. Rinse and then wash skin with water and soap.  •EYES Redness. Pain. Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Personal protection: P1 filter respirator for inert particles. Separated from strong oxidants and strong acids. Well closed. R: S: UN Hazard Class: 4.2 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 1404 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 TUNGSTEN (powder) ICSC: 1404 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: GREY TO WHITE POWDER PHYSICAL DANGERS: CHEMICAL DANGERS: The substance may ignite spontaneously on contact with air. Reacts with oxidants causing fire and explosion hazard. Reacts violently with strong acids . OCCUPATIONAL EXPOSURE LIMITS: TLV: 5 mg/m³ as TWA, 10 mg/m³ as STEL; (ACGIH 2004). MAK: IIb (not established but data is available) (DFG 2004). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: May cause mechanical irritation to the eyes , the skin and the respiratory tract. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 5900°C Melting point: 3410°C Density: 19.3 g/cm3 Solubility in water: none ENVIRONMENTAL DATA N O T E S Card has been partly updated in April 2005. See section Occupational Exposure Limits. ADDITIONAL INFORMATION ICSC: 1404 TUNGSTEN (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.