International Chemical Safety Cards 1,1,1,2-TETRAFLUOROETHANE ICSC: 1281 HFC 134a C2H2F4 Molecular mass: 102.03 (cylinder) ICSC #    1281 CAS #     811-97-2 RTECS # KI8842500 UN #        3159 March 26, 1998 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. NO contact with hot surfaces. In case of fire in the surroundings: use appropriate extinguishing media. EXPLOSION In case of fire: keep cylinder cool by spraying with water. EXPOSURE  •INHALATION Dizziness. Drowsiness. Dullness. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN ON CONTACT WITH LIQUID: FROSTBITE. Cold-insulating gloves. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes.  •EYES Safety goggles.  •INGESTION SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING NEVER direct water jet on liquid. Do NOT let this chemical enter the environment. Chemical protection suit including self-contained breathing apparatus. Fireproof. Keep in a well-ventilated room. R: S: UN Hazard Class: 2.2 SEE IMPORTANT INFORMATION ON BACK ICSC: 1281 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 1,1,1,2-TETRAFLUOROETHANE ICSC: 1281 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COMPRESSED LIQUEFIED GAS , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: On contact with hot surfaces or flames this substance decomposes forming toxic and corrosive fumes. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK: 1000 ppm, 4200 mg/m³; Peak limitation category: II(8); Pregnancy risk group: C; (DFG 2004). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: A harmful concentration of this gas in the air will be reached very quickly on loss of containment. EFFECTS OF SHORT-TERM EXPOSURE: Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the central nervous system and cardiovascular system , resulting in cardiac disorders . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: -26°C Melting point: -101°C Solubility in water: none Vapour pressure, kPa at 25°C: 630 Relative vapour density (air = 1): 3.5 Octanol/water partition coefficient as log Pow: 1.06 ENVIRONMENTAL DATA This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal. N O T E S Do NOT use in the vicinity of a fire or a hot surface, or during welding. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response. Transport Emergency Card: TEC (R)-20G2A ADDITIONAL INFORMATION ICSC: 1281 1,1,1,2-TETRAFLUOROETHANE (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.