International Chemical Safety Cards SELENIUM ICSC: 0072 Se Atomic mass: 79.0 (powder) ICSC #    0072 CAS #     7782-49-2 RTECS # VS7700000 EC #         034-001-00-2 April 26, 1993 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. NO contact with oxidants. Powder, AFFF, foam, carbon dioxide. NO water . EXPLOSION Risk of fire and explosion on contact with oxidants. EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Irritation of nose. Cough. Dizziness. Headache. Laboured breathing. Nausea. Sore throat. Vomiting. Weakness. Symptoms may be delayed (see Notes). Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Skin burns. Pain. Discolouration. Protective gloves. Protective clothing. Rinse skin with plenty of water or shower. Refer for medical attention. Remove and isolate contaminated clothes.  •EYES Redness. Pain. Blurred vision. Safety spectacles or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Metallic taste. Diarrhoea. Chills. Fever. (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 Do NOT wash away into sewer. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Personal protection: P3 filter respirator for toxic particles. Fireproof. Separated from strong oxidants, strong acids, food and feedstuffs . Dry. Airtight. Do not transport with food and feedstuffs. T symbol R: 23/25-33-53 S: 1/2-20/21-28-45-61 SEE IMPORTANT INFORMATION ON BACK ICSC: 0072 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 SELENIUM ICSC: 0072 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: ODOURLESS SOLID IN VARIOUS FORMS. DARK RED-BROWN TO BLUISH-BLACK AMORPHOUS SOLID OR RED TRANSPARENT CRYSTALS OR METALLIC GREY TO BLACK CRYSTALS. PHYSICAL DANGERS: CHEMICAL DANGERS: Upon heating, toxic fumes are formed. Reacts violently with oxidants strong acids . Reacts withwater at 50°C forming flammable/explosive gas (hydrogen - see ICSC0001) and selenious acids. Reacts with incandescence on gentle heating with phosphorous and metals such as nickel, zinc, sodium, potassium, platinum. OCCUPATIONAL EXPOSURE LIMITS: TLV: 0.2 mg/m³ as TWA; (ACGIH 2004). MAK: (Inhalable fraction) 0.05 mg/m³; Peak limitation category: II(4); Carcinogen category: 3B; Pregnancy risk group: C; (DFG 2004). OSHA PEL*: TWA 0.2 mg/m3 *Note: The PEL also applies to other selenium compounds (as Se) except NIOSH REL: TWA 0.2 mg/m3 *Note: The REL also applies to other selenium compounds (as Se) except Selenium hexafluoride. NIOSH IDLH: 1 mg/m3 (as Se) ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 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 substance is irritating to the eyes and the respiratory tract . Inhalation of dust may cause lung oedema (see Notes). Inhalation of fume may cause symptoms of asphyxiation, chills and fever and bronchitis. The effects may be delayed. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the respiratory tract, gastrointestinal tract, and skin , resulting in nausea, vomiting, cough, yellowish skin discolouration, loss of nails, garlic breath and bad teeth. PHYSICAL PROPERTIES Boiling point: 685°C Melting point: 170-217°C Relative density (water = 1): 4.8 Solubility in water: none Vapour pressure, Pa at 20°C: 0.1 ENVIRONMENTAL DATA N O T E S Do NOT take working clothes home. Card has been partly updated in April 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response. ADDITIONAL INFORMATION ICSC: 0072 SELENIUM (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.