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[Chemical Knowledge]：Properties and Uses of Dichloromethane

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properties and uses
of dichloromethane in the field of chemical production of raw materials
abstract:

this paper describes in detail the properties and uses of dichloromethane in the field of chemical production of raw materials. Through the discussion of the physical properties, chemical properties and safety of dichloromethane, its important position in chemical production is expounded. At the same time, this paper also discusses the wide application of dichloromethane in the manufacture of pharmaceuticals, pesticides, solvents and other chemicals, as well as the matters needing attention in the process of its use.

1. Introduction

Dichloromethane is a colorless and transparent organic compound with a pungent odor. As a common raw material for chemical production, methylene chloride is widely used in the fields of medicine, pesticide, solvent and other chemical products. This paper will introduce the properties and uses of dichloromethane in detail, in order to provide a useful reference for chemical production.

2. the nature of dichloromethane

1. physical properties

dichloromethane is a colorless transparent liquid, with pungent odor. Its boiling point is 39.8 ℃, melting point is -96.7 ℃, relative density is 1.3266(20/4 ℃), refractive index is 1.4243, and flash point is 17 ℃. Dichloromethane is poorly soluble in water and is miscible with organic solvents such as alcohols, ethers, and benzene.

2. Chemical properties

Dichloromethane has certain chemical stability, but under high temperature, light and acidic conditions, it is easy to decompose to generate chlorine and methane. In addition, methylene chloride can also react with metal sodium, potassium, etc. to generate corresponding metal organic compounds.

3. Safety

Dichloromethane has an anesthetic effect on the central nervous system. Inhalation of high concentrations of dichloromethane may cause dizziness, headache, nausea and other symptoms. Long-term exposure to low concentrations of methylene chloride may cause damage to the liver and kidneys. Therefore, in the process of production and use, it is necessary to strictly abide by the safety operation procedures to ensure the health and safety of the staff.

3. the use of methylene chloride

1. pharmaceutical manufacturing

in the field of pharmaceutical manufacturing, methylene chloride is commonly used as a solvent and extractant for the extraction and purification of pharmaceutical ingredients. In addition, methylene chloride can also be used to synthesize antibacterial drugs, antiepileptic drugs and other drugs.

2. Pesticide manufacturing

In the field of pesticide manufacturing, dichloromethane can be used as a solvent and reaction raw material for the production of pesticides, fungicides and herbicides and other pesticide products.

3. Solvent

Dichloromethane is an excellent solvent, which can be used to clean electronic components, precision mechanical parts, etc. In addition, methylene chloride can also be used as a diluent and solvent in the ink, paint and other industries.

4. Other chemical manufacturing

In chemical production, methylene chloride can also be used to manufacture vinyl chloride, polycarbonate and other chemical products. At the same time, dichloromethane can also be used as a reaction raw material to participate in the synthesis of a variety of organic compounds.
Precautions for
4.

In the process of using dichloromethane, you need to pay attention to the following points:

1. Maintain good ventilation and avoid inhaling high concentrations of dichloromethane vapor.
2. Wear protective equipment, such as protective gloves and goggles, to avoid skin contact and eye irritation.
3. Strictly abide by the safety operation procedures, avoid fire and high temperature environment.
4. Regularly check the production equipment and pipelines to ensure good sealing and prevent leakage accidents.

5. Conclusion

In conclusion, dichloromethane has a wide range of applications in the field of chemical production raw materials. Understanding the nature and use of methylene chloride is of great significance for improving chemical production efficiency and ensuring production safety. In the process of use, safety operation procedures should be strictly observed to ensure the health and safety of staff.

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