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[Chemical Knowledge]：Properties and Uses of Difluoromethane

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Difluoromethane is a colorless, odorless, non-flammable gas with excellent stability and chemical inertness, so it has a wide range of uses in the field of chemical production raw materials. This article will detail the nature and use of difluoromethane.

1. properties of difluoromethane

1. physical properties
difluoromethane is a colorless, odorless gas, molecular formula CH2F2, molecular weight of 46.03. Its boiling point is -51.7 ℃, melting point is -158.1 ℃, critical temperature is 101.3 ℃, critical pressure is 4.59MPa. Difluoromethane is denser than air and insoluble in water, but soluble in organic solvents.

2. chemical properties
difluoromethane has strong stability and chemical inertness, and is not easy to react with other substances. It is non-flammable, non-explosive, non-toxic, non-corrosive, and non-corrosive to metal and non-metal materials. At high temperatures, difluoromethane undergoes a decomposition reaction to produce fluorine gas and methane.

2. The use of difluoromethane

1. Refrigerant
Difluoromethane is a widely used refrigerant with the advantages of high efficiency, safety and environmental protection. It is mainly used in air conditioners, refrigerators, freezers and other refrigeration equipment, as well as automobiles, aircraft and other vehicles in the air conditioning system.

2. Blowing agent
Difluoromethane can also be used as a blowing agent for the production of polyurethane foam. This kind of foam plastic has excellent thermal insulation and mechanical properties, and is widely used in construction, household appliances, transportation and other fields.

3. Solvent
Difluoromethane can be used as a solvent for cleaning electronic components, precision mechanical parts, etc. Due to its chemical inertness and non-corrosive, it will not cause damage to the object to be cleaned.

4. pharmaceutical intermediates
difluoromethane can also be used as pharmaceutical intermediates for the production of anti-tuberculosis drugs, antifungal drugs.

In short, difluoromethane has a wide range of uses in the field of chemical production raw materials. Due to its stable physical and chemical properties, it is widely used in the fields of refrigerants, foaming agents, solvents and pharmaceutical intermediates.

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