International Chemical Safety Cards TELLURIUM ICSC: 0986 Aurum paradoxum Metallum problematum Te Atomic mass: 127.6 (powder) ICSC #    0986 CAS #     13494-80-9 RTECS # WY2625000 April 13, 2000 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Foam, carbon dioxide, dry powder. EXPLOSION Finely dispersed particles form explosive mixtures in air. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Drowsiness. Dry mouth.Metal taste. Headache. Garlic odour. Nausea. Local exhaust or breathing protection. Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.  •SKIN Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Redness. Pain. Safety goggles or eye protection in combination with breathing protection if powder. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Abdominal pain. Constipation. Vomiting. (Further see Inhalation). Do not eat, drink, or smoke during work. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into sealed containers. Carefully collect remainder, then remove to safe place. (Extra personal protection: P3 filter respirator for toxic particles). Separated from halogens and interhalogens. Unbreakable packaging; put breakable packaging into closed unbreakable container. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 0986 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 TELLURIUM ICSC: 0986 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: DARK GREY TO BROWN AMORPHOUS POWDER, WITH METAL CHARACTERISTICS OR SILVERY-WHITE, LUSTROUS CRYSTALLINE SOLID. PHYSICAL DANGERS: CHEMICAL DANGERS: Upon heating, toxic fumes are formed. Reacts vigorously with halogens or interhalogens causing fire hazard. Reacts with zinc with incandescence. Lithium silicide attacks tellurium with incandescence. OCCUPATIONAL EXPOSURE LIMITS: TLV: 0.1 mg/m³ (ACGIH 1999). OSHA PEL*: TWA 0.1 mg/m3 *Note: The PEL also applies to other tellurium compounds (as Te) except NIOSH REL: TWA 0.1 mg/m3 *Note: The REL also applies to other tellurium compounds (as Te) except Tellurium hexafluoride and Bismuth telluride. NIOSH IDLH: 25 mg/m3 (as Te) ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed . EFFECTS OF SHORT-TERM EXPOSURE: The aerosol of this substance irritates the eyes and the respiratory tract. The substance may cause effects on the liver and central nervous system . Exposure may result in garlic-like breath. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 989.8°C Melting point: 449.5°C Density: 6.0-6.25 g/cm3 Solubility in water: none Auto-ignition temperature: 340°C ENVIRONMENTAL DATA N O T E S Do NOT take working clothes home. Transport Emergency Card: TEC (R)-61G64c ADDITIONAL INFORMATION ICSC: 0986 TELLURIUM (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.