Benzene evaporates into the air very quickly. Using fans to circulate air will help clear low-lying areas of really intense concentrations. POTENTIAL HEALTH EFFECTS EYES: Contact may … PRODUCT AND COMPANY IDENTIFICATION MANUFACTURER DUDICK, INC. 1818 MILLER PARKWAY STREETSBORO, OH, 44241 330-562-1970 24 HR. • Many liquids are lighter than water. Avoid all sources of ignition: heat, sparks, open flame. In the event of a spill, styrene forms a slick that spreads on the water surface and evaporates . 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. Vapours are heavier than air and collect in confined and low-lying areas. If it contacts an ignition source, it will ignite (flash back). 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 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. These reactions may be explosive. Vapours are heavier than air and will spread at floor level. Styrene Monomer can POLYMERIZE resulting in uncontrolled reactions. More than 85% of styrene is sorbed in 78 hrs on samples from a sandy aquifer(3). 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 STYRENE MONOMER, STABILISED Unsuitable extinguishing media Do not use water jet as an extinguisher, as this will spread the fire. ), auto-ignition temperature: 490°C, vapours heavier than air with an odour threshold of 0.1 ppm. vapours are flammable, heavier than air, can cause explosions when in contact with sparks. 4. 7. The vapour is heavier than air, spreads along the ground and distant ignition is possible. However, after prolonged exposure to the chemical, the ability to In addition, styrene monomer is highly reactive, and will polymerize unless inhibited. Prevent the spilled product coming into contact with sources of flame. Special hazards arising from the substance or mixture Specific hazards Flammable liquid and vapour. 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. Flammable. It is heavier than air, so the vapour tends to stay close to the ground and can travel some distance before dispersing. Run-off may cause a fire or explosion hazard. It is insoluble in water and is lighter than water in liquid form. Keep fire exposed containers cool by spraying with water. 4.5 Corrosion Properties. This can be quite easily done by comparing the molar mass of the given gas with that of dry air. In the atmosphere, styrene, being heavier than air settles down soon, is rapidly dispersed, especially in the presence of sunlight. Vapors from styrene may cause flash fire. Styrene vapors will inhibit and slow the cure of gelcoat. heavier than air; beware of pits and confined spaces. heavier than air and may travel a long distance and accumulate in low lying areas. Carbon monoxide, Carbon dioxide. explosion. Material will float and can be re-ignited on surface of water. Behaviour in the environment . As a general rule, styrene is Vapours are heavier than air … What are styrene uses? Vapors are heavier than air and may travel to a source of ignition and flash back. • Vapors may form explosive mixtures with air. heavier than air and can spread along the ground in the direction of the wind. Ensure adequate ventilation. By mass, dry air contains 75.52% nitrogen, 23.15% oxygen, 1.28% argon and o.oo35% carbon dioxide as the major components. - In air: highly volatile, explosive mixture in air (LEL: 1.1% - UEL: 6.1% vol. Styrene vapors are heavier than air, and when ignited will flash back to the source, which may explode with enormous force. 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. as it spreads. 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. Take precautionary measures against static discharge. with air. Results of PBT and vPvB assessment: This substance does not meet the PBT/vPvB criteria of REACH, Annex XIII. Most vapors are heavier than air. Related Topics . Handle and open container with care in well-ventilated area. 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. : 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 As styrene thermal polymerization rate becomes important at temperatures higher than 50 °C , , the distillation process must be carried out at reduced pressure . • Runoff to sewer may create fire or explosion hazard. Subject to polymerization. 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). Vapour is heavier than air and may travel along the ground; distant ignition is possible. Heat development leads to selfignition. Less dense than water and insoluble in water. Vapours are heavier than air and may travel considerable distances to a source of ignition and flashback. Avoid Sparks. EMERGENCY TELEPHONE NUMBER ... vapors may be heavier than air and travel long distances along the ground before igniting and flashing back to vapor source. Vapors may form explosive mixtures with air. Vapour is heavier than air and may travel considerable distance to a source of ignition and flash back. At elevated temperature such as in fire condition, polymerisation may take place, which may lead to container explosion. Polymerisation in the presence of acids. Related Topics . They will spread along ground and collect in low or confined areas (sewers, basements, tanks). - in water: insoluble but can polymerise when exposed to sunlight. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Flammable concentrations of vapor can accumulate at temperatures above flash point; see Section 9. Use antistatic tools. Vapors heavier than air and irritating to the eyes and mucous membranes. 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 Benzene is formed from both natural processes and human activities. Do not empty into drains. One can smell styrene at very low concentrations (0.02 to 1.9 parts per million). Flammable mixtures may exist within the vapor space of containers at room temperature. 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. 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. 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. Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more ; Related Documents . Danger of polymerisation above 50 °C. 3. Its vapor is heavier than air and may sink into low-lying areas. Solvent vapours can form explosive mixtures with air in poorly ventilated conditions. Styrene vapors are heavier than air and may concentrate in the lower levels of molds and the work area. Styrene Monomer may accumulate static electricity. 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. Benzene dissolves only slightly in water and will float on top of water. more quickly. … Do not use compressed air for filling, discharging, or handling operations. 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. The styrene gives out irritating or toxic fumes (or gases) in a fire only. Monitor area with combustible gas indicator. Environmental precautions Do not allow to enter drains or waterways. Vapours are heavy and collect in low areas. Ensure electrical continuity by bonding and grounding (earthing) all equipment. • Most vapors are heavier than air. Ignition and/or flash back may occur. STYRENE 1. Extinguish naked flames. Vapor is heavier than air and may travel a distance to cause a fire or explosion far from the source and flash back. Beware of pits and confined spaces. Dense smoke is produced when product burns. HANDLING AND STORAGE General Precautions : Contaminated leather articles including shoes cannot be decontaminated and should be destroyed to prevent reuse. Phase diagram included. 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. A clear colorless to dark liquid with an aromatic odor. The vapour is heavier than air spreads along the ground and distant ignition is possible. In the event of a fire, sty-rene burns and produces toxic and acrid smoke. Where benzene is found and how it is used . Styrene vapors are heavier than air and may concentrate in the lower levels of molds and the work area. If the polymerization takes place inside a closed container, the container may rupture violently. Acetone - Thermophysical Properties - Chemical, physical and thermal properties of acetone, also called 2-propanone, dimethyl ketone and pyroacetic acid. It is reported as a gas leak, not fire blast, that means it was not the cause. Styrene's low flash point and lower explosive limit render it a serious fire and explosion hazard. not smoke. 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 5.2. Even when inhibitor is 5.3 Advice for fire -fighters A self contained brea thing apparatus and suitable protective clothing should be worn in fire conditions. May give off toxic fumes in a fire. Closed containers may rupture violently when heated. Styrene will polymerise readily at elevated temperatures and containers may explode if heated. Styrene is retained by particulates particularly in organic matter-rich soils(3). Non-corrosive to most metals except copper and copper -containing alloys. 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