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