Guide 148: Organic Peroxides (Heat and Contamination Sensitive/Temperature Controlled)

ERG 2024 Guide 148, page 1GUIDE 148 Organic Peroxides (Heat and Contamination Sensitive/Temperature Controlled) POTENTIAL HAZARDS FIRE OR EXPLOSION • May explode from heat, contamination or loss of temperature control. • These materials are particularly sensitive to temperature rises. Above a given "Control Temperature" they may decompose violently and catch fire. • May ignite combustibles (wood, paper, oil, clothing, etc.). • May ignite spontaneously if exposed to air. • May be ignited by heat, sparks or flames. • May burn rapidly with flare-burning effect. • Containers may explode when heated. • Runoff may create fire or explosion hazard. • • • HEALTH Fire may produce irritating, corrosive and/or toxic gases. Ingestion or contact (skin, eyes) with substance may cause severe injury or burns. Runoff from fire control or dilution water may cause environmental contamination. PUBLIC SAFETY CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover. Keep unauthorized personnel away. Stay upwind, uphill and/or upstream. • • • PROTECTIVE CLOTHING • Wear positive pressure self-contained breathing apparatus (SCBA). • Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE. • Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. EVACUATION Immediate precautionary measure • Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Large Spill • • Consider initial evacuation for at least 250 meters (800 feet) in all directions. Fire If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. Page 226 ERG 2024#

ERG 2024 Guide 148, page 2Organic Peroxides (Heat and Contamination Sensitive/Temperature Controlled) GUIDE 148 EMERGENCY RESPONSE FIRE • The temperature of the substance must be maintained at or below the “Control Temperature” at all times. Small Fire • • Water spray or fog is preferred; if water not available use dry chemical, CO2 or regular foam. Large Fire Flood fire area with water from a distance. • Use water spray or fog; avoid aiming straight or solid streams directly onto the product. • Do not move cargo or vehicle if cargo has been exposed to heat. • • If it can be done safely, move undamaged containers away from the area around the fire. Fire Involving Tanks, Rail Tank Cars or Highway Tanks Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. • Cool containers with flooding quantities of water until well after fire is out. • BEWARE OF POSSIBLE CONTAINER EXPLOSION. • ALWAYS stay away from tanks in direct contact with flames. • For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. SPILL OR LEAK • DO NOT allow the substance to warm up. Use a coolant agent such as dry ice or ice (wear thermal protective gloves). If this is not possible or none can be obtained, evacuate the area immediately. • ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. • Keep combustibles (wood, paper, oil, etc.) away from spilled material. • Do not touch or walk through spilled material. • Stop leak if you can do it without risk. Small Spill • Pick up with inert, damp, non-combustible material using clean, non-sparking tools and place into loosely covered plastic containers for later disposal. Large Spill • Dike far ahead of liquid spill for later disposal. • Prevent entry into waterways, sewers, basements or confined areas. • DO NOT CLEAN-UP OR DISPOSE OF, EXCEPT UNDER SUPERVISION OF A SPECIALIST. FIRST AID Refer to the “General First Aid” section. Specific First Aid: • Contaminated clothing may be a fire risk when dry. In Canada, an Emergency Response Assistance Plan (ERAP) may be required for this product. Please consult the shipping paper and/or the "ERAP" section. ERG 2024 Page 227#