PRODUCT INFORMATION HAZARDOUS INGREDIENTS PHYSICAL DATA. Tel: Fax: Internet:

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1 Tel: Fax: Internet: support@megs.ca Montreal St-Laurent Tel : Fax : Ottawa Nepean Tel : Fax : Quebec Quebec Tel : Fax : MSDS: Sulfur Dioxide PRODUCT INFORMATION PRODUCT: Sulfur Dioxide TRADE NAME: Sulfur Dioxide CHEMICAL NAME: Sulfur Dioxide; Sulfurous Acid Anhydride SYNONYMS: Sulfur Oxide; Sulphur Dioxide, Liquefied FORMULA:SO 2 CHEMICAL FAMILY: Inorganic Acid SUPPLIER'S NAME: MEGS Inc. SUPPLIER'S ADDRESS: 2675 De Miniac Ville St-Laurent, Qc, H4S 1E5 EMERGENCY PHONE NUMBER: (514) MOLECULAR WEIGHT: PRODUCT USE: Various PRODUCT IDENTIFICATION UN 1079 NUMBER: CHEMICAL ID Sulfur Dioxide HAZARDOUS INGREDIENTS CONCENTRATION CAS # 99+% LD(50) None LC(50) Inhl-hmn 400 ppm/1 min PHYSICAL DATA PHYSICAL STATE: Gas and liquid under pressure APPEARANCE: Colorless gas and liquid ODOR: Highly irritating pungent odor ODOR THRESHOLD:3 ppm for the average individual SPECIFIC GRAVITY (H 2 O = 1): 1.46 VAPOR PRESSURE: C VAPOR DENSITY (air = 1): 2.25 EVAPORATION RATE: Unknown

2 BOILING POINT: C FREEZING POINT: C ph: Acidic GAS DENSITY: C, kpa COEFFICIENT OF 15 C, Bunsen Coefficient = DISTRIBUTION: CONDITIONS OF FLAMMABILITY: FIRE OR EXPLOSION HAZARD MEANS OF EXTINCTION: FLASHPOINT AND METHOD OF DETERMINATION: UPPER EXPLOSION LIMIT (% BY VOL): LOWER EXPLOSION LIMIT (% BY VOL): AUTO-IGNITION TEMPERATURE: FLAMMABILITY CLASSIFICATION: HAZARDOUS COMBUSTION PRODUCTS: EXPLOSION DATA: SENSITIVITY TO STATIC DISCHARGE: None REACTIVITY DATA CHEMICAL STABILITY: Chemically stable, however reacts violently with water to produce toxic and corrosive fumes. INCOMPATIBLE MATERIALS: Peroxides, chromates, bichromates, permaganates and other strong oxidizers CONDITIONS OF REACTIVITY: Below 60 C HAZARDOUS DECOMPOSITION Reacts with chlorates to form ROUTES OF ENTRY: PRODUCTS: chlorine peroxide. Reaction TOXICOLOGICAL PROPERTIES becomes explosive as the temperature rises with the formation of chlorine. SKIN CONTACT: Corrosive and irritating to the skin and eyes. Symptoms depend on the concentration and duration of exposure and very from mild irritation to severe destruction of tissues. Skin contact causes irritation or

3 chemical-like burns. Contact with rapidly evaporating liquid can cause cryogenic "burns" or frostbite. SKIN ABSORPTION: Unknown EYE: Eye contact results in pain, lachrymation, inflammation, swelling of tissue and possible destruction of the eye. INHALATION: Corrosive and irritating to the upper and lower respiratory tracts. The symptoms may include burning sensations, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting. If the sulfur dioxide penetrates the lower airway, it can produce bronchitis, chemical pneumonitis and pulmonary edema. Concentrations of 6-12 ppm can cause immediate irritation of the nose and throat. INGESTION: Unknown ACUTE OVER EXPOSURE EFFECTS: Exposure to atmospheres contaminated with sulfur dioxide is extremely irritating. Its odor and prompt irritant action provide a warning of exposure to toxic conditions. High concentrations are extremely destructive to tissues of the eyes and skin. Inhalation may have fatal consequences as a result of spasm, inflammation and edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Exposure of the eyes to high concentrations may result in ulceration of the conjunctivae and cornea and destruction of all ocular tissues. Contact with the skin causes severe burns. Systemic toxicity due to sulfur dioxide is not known to occur. Frostbite effects are a change in color of the skin to gray or white possibly followed by blistering. CHRONIC OVER EXPOSURE EFFECTS: Unknown EXPOSURE LIMITS: TWA = 2 molar ppm; STEL = 5 molar ppm IRRITANCY OF PRODUCT: See Skin and Eyes Contact, above. SENSITIZATION TO MATERIAL: None known CARCINOGENICITY, REPRODUCTIVE EFFECTS: None known TERATOGENICITY, MUTAGENICITY: Sex chromosome loss, drosophila melanogaster, oral 2,000 umol/liter TOXICOLOGICALLY SYNERGISTIC PRODUCTS: None known PREVENTIVE MEASURES

4 PERSONAL PROTECTIVE EQUIPMENT: Silicon or butyl rubber gloves. Safety goggles or glasses, face shield. Safety shoes, safety shower and eyewash "fountain". SPECIFIC ENGINEERING CONTROLS: Most metals corrode rapidly with wet sulfur dioxide. Consult Liquid Air's Gas Encyclopedia for a complete listing of metal, plastic and elastomer qualifications and corrosion rates in wet and dry sulfur dioxide. LEAK AND SPILL PROCEDURES: EVACUATE ALL PERSONNEL FROM AFFECTED AREA. Use appropriate protective equipment. If leak is in user's equipment, be certain to purge piping with an inert gas prior to attempting repairs. If leak is on container or container valve, contact the closest MEGS location. WASTE DISPOSAL: Do not attempt to dispose of waste or unused quantities. Return in the shipping container properly labeled, with any valve outlet plugs or caps secured and valve protection cap in place to MEGS for proper disposal. For emergency disposal, contact the closest MEGS location. HANDLING PROCEDURES AND EQUIPMENT: USE ONLY IN WELL- VENTILATED AREAS. Valve protection caps must remain in place unless container is secured with valve outlet piped to the point of use. Do not drag, slide or roll cylinders. Use a suitable hand truck for cylinder movement. Use a pressure reducing regulator when connecting to lower pressure piping or systems. Do not heat cylinder by any means to increase the discharge rate of product from the cylinder. Use a check valve or trap in the discharge line to prevent hazardous back flow into the cylinder. Close valve after each use and when empty. STORAGE REQUIREMENTS: Protect cylinders from physical damage. Store in cool, dry, well-ventilated area of non combustible construction away from heavily trafficked areas and emergency exits. Do not allow the temperature where cylinders are stored to exceed 52 C. Cylinders must be stored upright and firmly secured to prevent falling or being knocked over. Full and empty cylinders should be segregated. Use a "first in - first out" inventory system to prevent full cylinders being stored for excessive periods of time. TDG CLASSIFICATION: 2.3 WHMIS CLASSIFICATION: A, D1, E SPECIAL SHIPPING INFORMATION: Always secure cylinders in an upright position before transporting them. NEVER transport cylinders in trunks of vehicles, enclosed vans, truck cabs or in passenger compartments. Transport

5 cylinders secured in open flatbed or in open pick-up type vehicles. FIRST AID MEASURES SPECIFIC FIRST AID PROCEDURES: PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE TO SULFUR DIOXIDE. RESCUE PERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS. INHALATION: Conscious persons should be assisted to an uncontaminated area and inhale fresh air. Unconscious persons should be moved to an uncontaminated area, given assisted resuscitation and supplemental oxygen. Keep the victim warm and quiet. Assure that mucous or vomited material does not obstruct the airway by positional drainage. The physician should be informed that the patient has inhaled acidic vapors. EYE CONTACT: PERSONS WITH POTENTIAL EXPOSURE TO SULFUR DIOXIDE SHOULD NOT WEAR CONTACT LENSES. Flush contaminated eye(s) with copious quantities of water. Part eyelids to assure complete flushing. Continue for a minimum of 15 minutes. SKIN CONTACT: Flush affected area with copious quantities of water. Remove affected clothing as rapidly as possible. Dermal Contact or Frostbite: Remove contaminated clothing and flush affected areas with lukewarm water. DO NOT USE HOT WATER. A physician should see the patient promptly if the cryogenic "burn" has resulted in blistering of the dermal surface or deep tissue freezing. PREPARED BY: Safety Department DATE PREPARED: 09/01/1999 LAST REVISION DATE: 01/01/2012 PREPARATION INFORMATION THE INFORMATION, RECOMMENDATIONS AND DATA CONTAINED IN THIS DOCUMENT ARE INTENDED TO BE USED BY PROPERLY TRAINED AND QUALIFIED PERSONNEL ONLY AND AT THEIR SOLE RISKS AND DISCRETION. THE INFORMATION, RECOMMENDATIONS AND DATA HEREIN CONTAINED ARE DERIVED FROM SOURCES WHICH WE BELIEVE

6 TO BE RELIABLE. HOWEVER, MEGS INC. MAKES NO REPRESENTATION AND GIVES NO WARRANTY OF ANY KIND WHATSOEVER WITH RESPECT TO THEIR ACCURACY OR COMPLETENESS AND ASSUMES NO LIABILITY FOR DAMAGES OR LOSS ARISING DIRECTLY OR INDIRECTLY FROM THEIR USE, WHETHER PROPER OR IMPROPER.