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[Chemical Knowledge]：The nature, use, upstream and downstream raw materials, storage methods of dichloropropane, is dichloropropane toxic?

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Properties of dichloropropane

Dichloropropane (1,2-dichloropropane, chemical formula C3H6Cl2) is a colorless and transparent liquid with a sweet and pungent odor. It has a boiling point of 96-99°C and a density of about 1.156g/cm³. It is insoluble in water, but soluble in most organic solvents, such as ethanol, ether and benzene. Dichloropropane is volatile and flammable and produces toxic chloride fumes when burned. Therefore, special attention should be paid to safety during handling and use.

Dichloropropane use

Dichloropropane is widely used and covers many industries. In the chemical industry, dichloropropane is mainly used in the production of intermediates of propylene oxide, as well as the synthesis of pesticides, pharmaceuticals and dyes. It is also used as a solvent, cleaning agent and degreaser, especially in the metal processing and cleaning industry has an important position. Due to its good dissolving power, dichloropropane is also a common ingredient in printing inks and coatings.

Dichloropropane upstream and downstream raw materials

Upstream raw materials

The main raw materials for the production of dichloropropane are propylene and chlorine. Propylene is an important petrochemical product, usually obtained by petroleum cracking or steam cracking of natural gas. Chlorine gas is usually produced by electrolysis of common salt (sodium chloride). In the process of synthesis of dichloropropane, propylene and chlorine in high temperature, high pressure and catalyst under the action of addition reaction, the formation of 1,2-dichloropropane.

Downstream Products

As an intermediate, dichloropropane can be further processed to produce a variety of chemical products. One of the most important downstream products is propylene oxide, which is an important raw material for the production of polyurethane foams, coatings, adhesives and other chemical products. Dichloropropane can also be used in the synthesis of various organic compounds, such as acrolein, glycerol, isopropanol, etc. The use of dichloropropane in pesticides also makes it a key raw material for the production of herbicides, insecticides and fungicides.

Dichloropropane storage method

Storage of dichloropropane requires consideration of its flammability, volatility and toxicity. Generally, dichloropropane should be stored in a cool, dry, well-ventilated dedicated warehouse, away from fire sources, heat sources and oxidants. The storage container shall be well sealed to avoid leakage and volatilization. The warehouse shall be equipped with fire protection equipment and leakage emergency treatment equipment, and the operators shall wear appropriate protective equipment, such as gloves, goggles and protective clothing. It is also necessary to regularly check the tightness and integrity of storage equipment to prevent potential safety hazards due to aging or damage.

Environmental and health impacts

Dichloropropane is potentially hazardous to the environment and health. In the environment, dichloropropane is easy to volatilize into the atmosphere and cause pollution to water and soil. It is moderately biodegradable, but may cause toxic effects on aquatic organisms at high concentrations. In terms of health, dichloropropane enters the human body through the respiratory tract, skin and digestive tract, which can cause acute poisoning symptoms such as headache, nausea, vomiting, and dizziness. Long-term exposure may lead to liver and kidney damage, and even have the risk of cancer. Therefore, it is necessary to strictly control its emissions in industrial production and use, and take appropriate protective measures to protect the health of workers.

Conclusion

As an important organic chemical raw material, dichloropropane plays an important role in many industrial fields because of its wide application and good solubility. Its production involves upstream raw materials such as propylene and chlorine, and through further processing can produce many downstream products with high added value. Because it has certain environmental and health risks, safety regulations must be strictly observed during storage and use to reduce the harm to the environment and human body. In the future development, with the increasingly stringent environmental regulations, the green production process and harmless treatment technology of dichloropropane will become an important direction of research and development.

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