PHYSICAL PROPERTIES   DURACOOL 12a® PHYSICAL STATE: Gas SPECIFIC GRAVITY: 0.552 EVAPORATION RATE: Fast >1 (1=n-butyl acetate) FREEZING POINT: -174°C    -281°F pH: n. ap. ODOUR & APPEARANCE: Colourless gas, faintly disagreeable odour, stenched to allow detection of leaks ODOUR THRESHOLD: 4900 ppm VAPOUR PRESSURE (kPa @ 21°C): 482 (psig @ 70°F): 70 VAPOUR DENSITY: 1.72 BOILING POINT: –31.5°C     –24.7°F COEFFICIENT OF WATER/OIL DISTRIBUTION: <1   DURACOOL 22a® PHYSICAL STATE: Gas SPECIFIC GRAVITY: 0.529 EVAPORATION RATE: Fast >1 (1=n-butyl acetate) FREEZING POINT: –188°C     –306°F pH: n. ap. ODOUR & APPEARANCE: Colourless gas, faintly disagreeable odour, stenched to allow detection of leaks ODOUR THRESHOLD: 4800 ppm VAPOUR PRESSURE (kPa @ 21°C): 758 (psig @ 70°F): 110 VAPOUR DENSITY: 1.52 BOILING POINT: –42.1°C     –43.8°F COEFFICIENT OF WATER/OIL DISTRIBUTION: <1   DURACOOL 502a® PHYSICAL STATE: Gas SPECIFIC GRAVITY: 0.506 EVAPORATION RATE: Fast >1 (1=n-butyl acetate) FREEZING POINT: –187°C     –305°F pH: n. ap. ODOUR & APPEARANCE: Colourless gas, faintly disagreeable odour, stenched to allow detection of leaks ODOUR THRESHOLD: 4800 ppm VAPOUR PRESSURE (kPa @ 21°C): 965 (psig @ 70°F): 140 VAPOUR DENSITY: 1.50 BOILING POINT: –49°C     –56.2°F COEFFICIENT OF WATER/OIL DISTRIBUTION: <1

INGREDIENTS DURACOOL 12a® ACGIH(2002) COMPONENTS % CAS LD50 LC50 TLV v/v inhalation (ppm) (rat) methylethylmethane 15-40 106-97-8 n.ap. 276,000 ppm 800 4 hr (mouse) 2-methylpropane 30-60 75-28-5 n.ap. 52mg/kg 1hr simple asphyxiant dimethylmethane 40-70 74-98-6 n.ap. n.av. simple asphyxiant Non Hazardous Ingredients =<2 n.ap. n.ap. n.ap. n.ap. DURACOOL 22a® ACGIH(2002) COMPONENTS % CAS LD50 LC50 TLV v/v                     (ppm) dimethylmethane =>98 74-98-6 n.ap. n.av. simple asphyxiant Non Hazardous Ingredients =<2 n.ap. n.ap. n.ap. n.ap. DURACOOL 502a® ACGIH(2002) COMPONENTS % CAS LD50 LC50 TLV v/v                     (ppm) ethyl hydride 3-7 78-84-0 n.ap. n.av. simple asphyxiant dimethylmethane 60-100 74-98-6 n.ap. n.av. simple asphyxiant Non Hazardous Ingredients =<2 n.ap. n.ap. n.ap. n.ap.

TOXICOLOGICAL ASSESSMENT INGESTION: Not likely to occur. SKIN OR EYE CONTACT: Exposure to rapidly expanding gas or vapourizing liquid may cause frost damage to tissue and permanent eye damage. INHALATION: High concentrations of this gas may cause an oxygen-deficient environment. Individuals breathing such an atmosphere may experience symptoms that include headaches, ringing in the ears, dizziness, drowsiness, unconsciousness, nausea, vomiting and depression of all the senses. Vapours may be encountered in confined spaces and/or under conditions of poor ventilation. Avoid breathing vapours or mist. CHRONIC: 12a® There are currently no known adverse health effects associated with chronic exposure. 22a® There are currently no known adverse health effects associated with chronic exposure. 502a® There are currently no known adverse health effects associated with chronic exposure. CARCINOGENICITY, REPRODUCTIVE TOXICITY, TERATOGENICITY AND EMBRYOTOXICITY, MUTAGENICITY: No effects reported, not listed by NTP, OSHA or LARC. SYNERGISTIC: May aggravate an existing dermatitis. The above evaluation of hazard is based on knowledge of the toxicity of the material’s components. EXPOSURE LIMITS: 12a®           ACGIH(2002) 800 ppm                    OSHA PEL (1998):                    1000 ppm 22a®, 502a®    ACGIH (2002):                     simple asphyxiant                     OSHA PEL (1998):                    1000 ppm

FIRST AID MEASURES EYES: Check for contact lenses and remove if present. Flush eyes with large amounts of water for at least 15 minutes. Call for medical attention if irritation persists. INHALATION: In emergency situations use proper respiratory protection and immediately remove the victim from exposure. Administer artificial respiration if breathing has stopped. Keep at rest and call for medical attention. SKIN: Flush with large amounts of water. Use soap if available. Remove severely contaminated clothing (including shoes) and launder before reuse. In case of frostbite from contact with liquid, immediately place affected area in lukewarm water and keep at this temperature until circulation returns. If inflammation or irritation develop seek immediate medical attention INGESTION: Not likely to occur. PREVENTIVE MEASURES PERSONAL PROTECTION: The selection of personal protective equipmentvaries, depending upon conditions of use. In open systems where contact is likely, wear gas-proof goggles, face shield, chemical-resistant overalls and appropriate thermal/chemical gloves. Where skin and eye contact is unlikely, but may occur as a result of short and/or periodic exposures, wear long sleeves, chemical resistant gloves and gas-proof goggles. Where concentrations in air may exceed the occupational exposure limits and where engineering, work practices or other means of exposure reduction are not adequate, approved respirators may be necessary to prevent overexposure by inhalation. Respiratory protection must be NIOSH/MSHA approved and conform to OSHA rules specified in 29 CFR 1910.134. ENGINEERING Use only in well ventilated situations or employ CONTROLS: extraction ventilation to maintain atmospheric concentrations well below exposure standards. All mechanical equipment used in ventilation systems should be spark proof. SPILL/DISPOSAL PROCEDURES: Eliminate all sources of ignition. Prevent additional discharge of material if possible to do so without hazard. Warn occupants of downwind areas. Disperse vapours with hose streams using fog nozzles. Ensure disposal is in compliance with government requirements and ensure conformity to local disposal regulations. Notify the appropriate authorities immediately. HANDLING, STORAGE & SHIPPING: Store in a cool, well ventilated place away from incompatible materials, do not allow cylinder temperature to exceed 52°C (125°F). Cylinders that are not in use must have the valves in the closed position and be equipped with a protective cap. Transport and store cylinders secured in an upright position in a ventilated space. Use proper grounding procedures. DOT / TDG: Petroleum gases, liquefied, 2.1, UN1075

FIRE OR EXPLOSION HAZARD

DURACOOL 12a® FLAMMABILITY LIMITS IN AIR LFL UFL (% BY VOLUME): 1.95% 9.1% AUTOIGNITION TEMPERATURE: 891°C 1636°F FLASHPOINT: n. av.

DURACOOL 22a® FLAMMABILITY LIMITS IN AIR LFL UFL (% BY VOLUME): 2.0% 10.0% AUTOIGNITION TEMPERATURE: 480°C 896°F FLASHPOINT: n. av.

DURACOOL 502a® FLAMMABILITY LIMITS IN AIR LFL UFL (% BY VOLUME): 2.2% 10.2% AUTOIGNITION TEMPERATURE: 472°C 882°F FLASHPOINT: n. av.

HAZARDOUS COMBUSTION PRODUCTS: Carbon dioxide, acrid fumes. SENSITIVITY TO MECHANICAL IMPACT: Mixture not sensitive, protect cylinders from damage. SENSITIVITY TO STATIC DISCHARGE: Vapours may ignite if exposed to static discharge. FIRE AND EXPLOSION HAZARD: Flammable air-vapour mixtures may form if allowed to leak to atmosphere. Accumulation of gas is an ignition hazard. Vapours are heavier than air and may travel to an ignition source. Flashback along vapour trail may occur. FIRE EXTINGUISHING PRECAUTIONS: Use water spray to cool exposed cylinders. Do not extinguish flames unless leak can be stopped. Fire can be extinguished with carbon dioxide and/or dry chemical. NFPA HAZARD CLASSIFICTAION: HEALTH: 1 = Materials that, on exposure, would cause irritation, but only minor residual injury even if no treatment is given. FLAMMABILITY: 4 = Materials which will rapidly or completely vapourize at atmospheric presssure and normal ambient temperature, or which are readily dispersed in the air and which will burn readily. The preferred method of fire attack is to stop the flow of material or to protect exposures while allowing the fire to burn itself out. REACTIVITY: 0 = This degree includes materials that are normally stable, even under fire exposure conditions, and that do not react with water. Normal fire fighting procedures may be used.

REACTIVITY DATA

This material is stable. Hazardous Polymerization will not occur. INCOMPATIBILITY: Nickel carbonyl with oxygen, chlorine, strong oxidizers. CONDITIONS TO AVOID: Avoid excessive heat and/or static discharge. Gas explodes spontaneously when mixed with chlorine dioxide. HAZARDOUS DECOMPOSITION: Thermal decomposition and burning may produce carbon dioxide and/or acrid fumes.

PREPARATION

Duracool, Technical Department. (780) 449-4777 November 18, 2004  supersedes: November 26, 2002 All information given by Duracool is offered in good faith and is believed to the best of our knowledge to be accurate. The information contained herein is based on supplier and/or other information available at the indicated date of preparation. Duracool does not guarantee the accuracy and this information is offered without warranty, guarantee or liability on the part of the preparer in good faith. n. av. not available n. ap. not applicable est. estimate v/v volume/volume basis < less than > greater than