International Chemical Safety Cards RADON ICSC: 1322 Rn Atomic mass: 222 ICSC #    1322 CAS #     10043-92-2 RTECS # VE3750000 UN #        2982 March 11, 2001 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. In case of fire in the surroundings: all extinguishing agents allowed. EXPLOSION EXPOSURE STRICT HYGIENE!  •INHALATION See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE. Ventilation, local exhaust, or breathing protection.  •SKIN  •EYES  •INGESTION Do not eat, drink, or smoke during work. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Ventilation. (Extra personal protection: self-contained breathing apparatus.) R: S: UN Hazard Class: 7 SEE IMPORTANT INFORMATION ON BACK ICSC: 1322 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 RADON ICSC: 1322 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS GAS PHYSICAL DANGERS: CHEMICAL DANGERS: OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: EFFECTS OF SHORT-TERM EXPOSURE: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: This substance is carcinogenic to humans. See Notes. PHYSICAL PROPERTIES Boiling point: -62°C Melting point: -71°C Density: 9.73 g/l Solubility in water, ml/100 ml at 20°C: 22.2 ENVIRONMENTAL DATA Radon is a common source of natural radiation. N O T E S Radon is derived from the radioactive decay of uranium to radium then radon. The effects of radon are largely attributed to the inhalation of its radioactive decay products. The pattern of their deposition in the respiratory tract is dependent on whether they are attached to particles or not. Depending on the degree of exposure, periodic medical examination is indicated. ADDITIONAL INFORMATION ICSC: 1322 RADON (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.