Styrene, an organic compound with chemical formula C8H8, the electron of vinyl is conjugated with benzene ring, insoluble in water, soluble in most organic solvents such as ethanol, ether, etc. It is an important monomer for synthetic resin, ion exchange resin and synthetic rubber, etc.

　　Main applications

　　Styrene is mainly used as an important monomer for synthetic resins, ion exchange resins and synthetic rubber, etc. It can also be used in pharmaceutical, dye, pesticide and mineral processing industries.

　　First aid measures

　　Skin contact: Remove contaminated clothing and rinse skin thoroughly with soapy water and water.

　　Eye contact: Immediately lift eyelids and flush thoroughly with plenty of running water or saline for at least 15 minutes. Seek medical attention.

　　Inhalation: Remove from the scene to fresh air quickly. Keep airway open. If breathing is difficult, administer oxygen. If breathing stops, give immediate artificial respiration. Seek medical attention.

　　Ingestion: Drink enough warm water to induce vomiting. Seek medical attention.

　　Fire-fighting measures

　　Hazardous characteristics: Its vapor and air can form an explosive mixture, and in contact with open flame, high heat or oxidizer, there is a risk of combustion and explosion. In contact with acid catalysts such as Lewis catalyst, Ziegler catalyst, sulfuric acid, ferric chloride, aluminum chloride, etc., it can produce violent polymerization and emit a lot of heat. Its vapor is heavier than air, can be spread to a considerable distance at a lower place, and will catch fire when encountering an ignition source.

　　Harmful combustion products: carbon monoxide, carbon dioxide.

　　Fire extinguishing methods: move the container from the fire to the open area as far as possible. Spray water to keep the fire container cool, until the end of the fire. Extinguishing agents: foam, dry powder, carbon dioxide, sand and soil. Water is not effective to extinguish the fire. In case of large fire, firefighters must operate in a protected shelter.

　　Leak emergency treatment

　　Emergency treatment: Quickly evacuate people in the contaminated area of the spill to a safe area, and isolate and strictly limit access. Cut off the source of fire. It is recommended that emergency responders wear self-contained positive pressure respirators and gas-protective clothing. Cut off the source of the spill if possible. Prevent flow into restricted spaces such as sewers and flood drains.

　　Small spills: Absorb with activated carbon or other inert materials. You can also brush with an emulsion made of non-flammable dispersant, and dilute the wash into the wastewater system.

　　Large spills: Construct a dike or dig a pit to take in. Cover with foam to reduce vapor disaster. Transfer to tanker or special collector with explosion-proof pump, recycle or transport to waste disposal site for disposal.

　　Operation, disposal and storage

　　Operation precautions

　　Close the operation and strengthen ventilation. Operators must be specially trained and strictly follow the operating procedures. It is recommended that operators wear filtered gas masks (half masks), chemical safety glasses, anti-poison penetration overalls and rubber oil-resistant gloves. Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Prevent vapors from leaking into the workplace air. Avoid contact with oxidizers and acids. The flow rate should be controlled when filling, and there is a grounding device to prevent static electricity accumulation. Handling should be lightly loaded and unloaded to prevent damage to packaging and containers. Equipped with appropriate varieties and quantities of fire-fighting equipment and leak emergency handling equipment. Emptying containers may leave harmful substances.

　　Storage precautions

　　Usually commodities are added with polymerization inhibitors. Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Storage temperature should not exceed 30℃. The package should be sealed and not in contact with air. It should be stored separately from oxidizers and acids, and should not be mixed. Do not store large quantities or for a long time. Use explosion-proof lighting and ventilation facilities. Prohibit the use of spark-prone machinery and tools. The storage area should be equipped with leakage emergency treatment equipment and suitable shelter materials.

　　Protective measures

　　Engineering control: The production process should be sealed and ventilation should be strengthened.

　　Respiratory protection: When the concentration in the air exceeds the standard, it is recommended to wear a filtered gas mask (half mask). In case of emergency rescue or evacuation, isolation respirator is recommended.

　　Eye protection: No special protection is needed in general. Chemical safety glasses can be worn for high concentration exposure.

　　Body protection: Wear protective clothing against toxic permeation.

　　Hand protection: Wear rubber oil resistant gloves.

　　Other protection: Smoking, eating and drinking are prohibited at the work site. After work, shower and change clothes. Maintain good hygiene habits.

　　Packaging and transportation

　　Packing methods: Small open steel drums; lattice boxes outside thin steel plate drums or tin-plated thin steel plate drums (cans); ordinary wooden boxes outside ampoules; ordinary wooden boxes outside threaded-mouth glass bottles, iron-capped pressed-mouth glass bottles, plastic bottles or metal drums (cans); full-bottom lattice boxes, fiberboard boxes or plywood boxes outside threaded-mouth glass bottles, plastic bottles or tin-plated thin steel plate drums (cans).

　　Note for transportation: Railway transportation should be strictly in accordance with the Ministry of Railways "Rules for the transport of dangerous goods" in the table of dangerous goods to assemble. Transport vehicles should be equipped with the appropriate variety and quantity of fire-fighting equipment and leak emergency treatment equipment. It is better to transport in the morning and evening in summer. The tank (tank) used for transportation should have a grounding chain, and the tank can be equipped with a hole partition to reduce static electricity generated by shock. Mixed transport with oxidizers, acids, edible chemicals, etc. is strictly prohibited. During transportation, it should be protected from exposure, rain and high temperature. It should be kept away from fire, heat source and high temperature area when stopping in the middle of the journey. The exhaust pipe of the vehicle must be equipped with a flame arresting device, and the use of spark-prone machinery and tools for loading and unloading is prohibited. Road transport should follow the prescribed route, do not stay in residential areas and densely populated areas. Railroad transportation should be prohibited when slipping and placing. Prohibit the use of wooden ships, cement ships bulk transport.