More than 85% of styrene is sorbed in 78 hrs on samples from a sandy aquifer(3). An extraction system should also have been in place to remove the heavier than air vapours and RPE provided with the correct filters (FFP3) to protect operators. 3. These reactions may be explosive. However, the company did not take action to comply with the Notice until they moved premises in March 2015 failing to adequately control exposure of their employees to styrene. However, after prolonged exposure to the chemical, the ability to Vapors heavier than air and irritating to the eyes and mucous membranes. At elevated temperature such as in fire condition, polymerisation may take place, which may lead to container explosion. Carbon monoxide, Carbon dioxide. What are styrene uses? • Runoff to sewer may create fire or explosion hazard. • Vapors may form explosive mixtures with air. Subject to polymerization. Vapors from styrene may cause flash fire. Extinguish naked flames. heavier than air and can spread along the ground in the direction of the wind. IMMEDIATE CONCERNS: Styrene and vinyl toluene vapors are heavier than air and may travel along ground or may be moved by ventilation and ignited by sources at locations distant from material handling point. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Styrene vapors are heavier than air and may concentrate in the lower levels of molds and the work area. 5.2. If the polymerization takes place inside a closed container, the container may rupture violently. Vapours are heavier than air … more quickly. EMERGENCY TELEPHONE NUMBER ... vapors may be heavier than air and travel long distances along the ground before igniting and flashing back to vapor source. Avoid all sources of ignition: heat, sparks, open flame. The vapour is heavier than air, spreads along the ground and distant ignition is possible. It is heavier than air, so the vapour tends to stay close to the ground and can travel some distance before dispersing. The reaction to styrene-epoxide was stronger than that obtained by patch testing with an equimolar concentration of styrene, 0.1 percent weight per volume in ethanol. • Most vapors are heavier than air. Flammable. Even when inhibitor is Styrene will polymerise readily at elevated temperatures and containers may explode if heated. This can be quite easily done by comparing the molar mass of the given gas with that of dry air. POTENTIAL HEALTH EFFECTS EYES: Contact may … Styrene, also known as Ethenylbenzene, Phenylethylene, Vinylbenzene, Cinnamene, etc, has a Molecular Weight of 104.15 g/mol and is insoluble in water while also being less dense than water.It is highly soluble in organic solvents such as Acetone, CCl4, Benzene, Ether, n-Heptane, and Ethanol. Initial Boiling Point For Styrene 293.40 Deg F (145.22 Deg C) @ 760.00 mm Hg Vapor Pressure For Styrene 4.3 mm Hg 68 Deg F (20.00 Deg C) Vapor Density Air = 1 3.6 Specific Gravity 1.110 - 1.130 @ 77.00 Deg F (25.00 Deg C) Percent Non-volatiles 55.0% Evaporation Rate Slower than Ether Ensure electrical continuity by bonding and grounding (earthing) all equipment. Less dense than water and insoluble in water. Flammable concentrations of vapor can accumulate at temperatures above flash point; see Section 9. Avoid Sparks. Acetone - Thermophysical Properties - Chemical, physical and thermal properties of acetone, also called 2-propanone, dimethyl ketone and pyroacetic acid. General clean air dilution or local exhaust ventilation should be provided in volume and pattern to keep vapors well below the lower explosion limit and all Use antistatic tools. Related Topics . By mass, dry air contains 75.52% nitrogen, 23.15% oxygen, 1.28% argon and o.oo35% carbon dioxide as the major components. As a general rule, styrene is It is reported as a gas leak, not fire blast, that means it was not the cause. heavier than air; beware of pits and confined spaces. Monitor area with combustible gas indicator. Beware of pits and confined spaces. PRODUCT AND COMPANY IDENTIFICATION MANUFACTURER DUDICK, INC. 1818 MILLER PARKWAY STREETSBORO, OH, 44241 330-562-1970 24 HR. Do not use compressed air for filling, discharging, or handling operations. Styrene Monomer may accumulate static electricity. Styrene vapors are heavier than air and may concentrate in the lower levels of molds and the work area. Phase diagram included. A clear colorless to dark liquid with an aromatic odor. Vapour is heavier than air and may travel considerable distance to a source of ignition and flash back. Environmental precautions Do not allow to enter drains or waterways. - in water: insoluble but can polymerise when exposed to sunlight. : Special hazards arising from the substance or mixture / Conditions of flammability Flammability classification (OSHA 29 CFR 1910.106) ... a-Methyl styrene 10 ppm N/Av 100ppm (Ceiling) N/Av Exposure controls Styrene vapors will inhibit and slow the cure of gelcoat. Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more ; Related Documents . Styrene is 3.6 times heavier than air and rapidly settle down, not spread at height more than 3 ft, but in nearby village and area, people fell which walking, animals died when standing. In the event of a fire, sty-rene burns and produces toxic and acrid smoke. 7. Polymerisation in the presence of acids. Non-corrosive to most metals except copper and copper -containing alloys. not smoke. The styrene gives out irritating or toxic fumes (or gases) in a fire only. Run-off may cause a fire or explosion hazard. Styrene is retained by particulates particularly in organic matter-rich soils(3). They will spread along ground and collect in low or confined areas (sewers, basements, tanks). ), auto-ignition temperature: 490°C, vapours heavier than air with an odour threshold of 0.1 ppm. Prevent the spilled product coming into contact with sources of flame. HANDLING AND STORAGE General Precautions : Contaminated leather articles including shoes cannot be decontaminated and should be destroyed to prevent reuse. Most vapors are heavier than air. If tank, rail car or tank truck is involved in fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 Vapour is heavier than air and may travel along the ground; distant ignition is possible. Solvent vapours can form explosive mixtures with air in poorly ventilated conditions. Vapor is heavier than air and may travel a distance to cause a fire or explosion far from the source and flash back. Benzene dissolves only slightly in water and will float on top of water. Heat development leads to selfignition. Its vapor is heavier than air and may sink into low-lying areas. For more than 70 years, styrene has been used as a chemical building block to make the materials used in a wide variety of finished consumer products, such as food containers, rubber tires, building insulation, carpet backing and boat hulls, surfboards, residential kitchen countertops, bathtubs and shower enclosures. Identification of the substance Styrene Monomer CAS number 100-42-5 1.2 Relevant identified uses of the substance or mixture and uses advised against ... Vapors are heavier than air, spread along floors and form ex-plosive mixtures with air. Where benzene is found and how it is used . In addition, styrene monomer is highly reactive, and will polymerize unless inhibited. Vapours are heavier than air and may travel considerable distances to a source of ignition and flashback. The main problem in distillation is the very high energy consumption, because TBC is heavier than styrene so a large amount of the monomer purified must be evaporated and then condensed. As styrene thermal polymerization rate becomes important at temperatures higher than 50 °C , , the distillation process must be carried out at reduced pressure . Benzene is formed from both natural processes and human activities. Styrene is heavier than air, so if you are working down in a mold, the concentration of styrene will be very high because it doesn’t want to float up and out. 4.5 Corrosion Properties. Results of PBT and vPvB assessment: This substance does not meet the PBT/vPvB criteria of REACH, Annex XIII. … 5.3 Advice for fire -fighters A self contained brea thing apparatus and suitable protective clothing should be worn in fire conditions. Vapours are heavier than air and collect in confined and low-lying areas. Ensure adequate ventilation. Of styrene that had been allowed to sorb for 3 days, 61.0 and 66.7% was desorbed in 16 days from soil and aquifer soils, respectively(4). Handle and open container with care in well-ventilated area. Benzene evaporates into the air very quickly. It is insoluble in water and is lighter than water in liquid form. as it spreads. Vapors are heavier than air and may travel to a source of ignition and flash back. Vapours are heavier than air and will spread at floor level. If it contacts an ignition source, it will ignite (flash back). heavier than air and may travel a long distance and accumulate in low lying areas. In the event of a spill, styrene forms a slick that spreads on the water surface and evaporates . explosion. Closed containers may rupture violently when heated. Material will float and can be re-ignited on surface of water. Ignition and/or flash back may occur. One can smell styrene at very low concentrations (0.02 to 1.9 parts per million). STYRENE MONOMER, STABILISED Unsuitable extinguishing media Do not use water jet as an extinguisher, as this will spread the fire. Keep fire exposed containers cool by spraying with water. Do not empty into drains. Control Valves - Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators and positioners; Gases and Compressed Air - Air, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves; Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more Dense smoke is produced when product burns. Using fans to circulate air will help clear low-lying areas of really intense concentrations. Behaviour in the environment . with air. vapours are flammable, heavier than air, can cause explosions when in contact with sparks. 4. Vapours are heavy and collect in low areas. Special hazards arising from the substance or mixture Specific hazards Flammable liquid and vapour. Styrene's low flash point and lower explosive limit render it a serious fire and explosion hazard. Because styrene is heavier than air it will pool at the bottom of a mold cavity and slow down the cure of the gelcoat located in the bottom or lower parts of a mold. May give off toxic fumes in a fire. The choice of instrument settings for the process measurements was informed by the molecular weight of styrene at 104.15 g/mol which is higher than the averaged equivalent for air at 28.97 g/mol (Engineering Toolbox, 2013).To represent the worst-case scenario, the PID instrument was located on the centreline between the mould tool and the extraction system (Supplementary Fig. Styrene vapors are heavier than air, and when ignited will flash back to the source, which may explode with enormous force. Vapors may form explosive mixtures with air. 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