2% 2C4-diethylnaphthalene, which is an organic compound. It has a wide range of uses and is a key intermediate in the chemical industry. With its own unique chemical structure, it can undergo many chemical reactions to derive a series of high value-added products.
In the field of synthetic materials, it can be used to prepare engineering plastics with excellent performance. Such engineering plastics have high strength, high heat resistance, chemical corrosion resistance and other characteristics, and are widely used in high-end fields such as automobile manufacturing, aerospace and other high-end fields. For example, some parts of aero-engines require materials that can withstand high temperatures and complex chemical environments. Engineering plastics derived from 2% 2C4-diethylnaphthalene can serve this purpose.
In the fine chemical industry, 2% 2C4-diethylnaphthalene is an important raw material for the synthesis of special dyes and pigments. The synthesized dyes and pigments have bright colors and good stability, and are widely used in textile printing and dyeing, ink manufacturing and other industries, adding brilliant color and lasting quality to products.
In addition, in the field of pharmaceutical and chemical industry, it also shows potential value. Although it is not directly used as a drug, it can be used as a raw material for the synthesis of some drug intermediates. By modifying and transforming its chemical structure, it provides a possible path for the research and development of new drugs and helps the development of human health.
In summary, 2% 2C4-diethylnaphthalene plays an indispensable role in many chemical-related fields due to its unique chemical properties, which is of great significance for promoting technological progress and product upgrading in various industries.

2% 2C4 -diethylhexanol, its physical properties are as follows:
This substance is a colorless and slightly viscous liquid at room temperature, with a special odor. Its boiling point is quite high, about 234 ° C. At such a temperature, it changes from liquid to gaseous. This high boiling point characteristic makes it stable in liquid state at general ambient temperature, and it is not easy to evaporate and dissipate.
The melting point is very low, about -70 ° C, which means that when the temperature drops to -70 ° C, the substance condenses from liquid to solid. Such a low melting point indicates that it can still maintain good fluidity in common low temperature environments and is not easy to solidify due to a slight drop in temperature.
The relative density is about 0.834 (20 ° C), which is lighter than water, so if mixed with water, this substance will float on the water surface. Its refractive index is about 1.4316, and when light passes through the substance, it will refract according to this specific ratio. This property can be used as an important identification basis in optical related applications or detection.
In addition, 2% 2C4-diethylhexanol is slightly soluble in water, but it can be miscible with most organic solvents such as alcohols and ethers in any ratio. This solubility characteristic makes it often used as a solvent in chemical production, which can effectively dissolve many organic compounds, assist the reaction or be used for material separation and purification operations.

2% 2C4-dichlorodifluoromethane, that is, Freon-12, its chemical properties are relatively stable at room temperature and pressure.
This substance is normally a colorless and odorless gas with a low boiling point of about -29.8 ° C. Due to its strong carbon-chlorine bond and carbon-fluorine bond in its molecular structure, it is not easy to chemically react under normal conditions. In the troposphere of the atmosphere, it can exist stably for a long time and is difficult to react with other substances.
However, when the substance rises to the stratosphere, it will undergo photolysis under strong ultraviolet radiation. Among them, the carbon-chlorine bond breaks, releasing chlorine atoms, which will cause serious damage to the ozone layer, which is also a key point in its chemical properties.
From the perspective of chemical stability, in ordinary environments, 2% 2C4-dichlorodifluoromethane can maintain a relatively stable state and is not easy to react with common acid-base substances, water, etc. However, in special high-energy environments, such as strong ultraviolet rays in the stratosphere, its chemical stability will be broken, triggering a series of chemical changes that have a significant impact on the environment.

The preparation method of 2% 2C4-dichlorofluorobenzene, although this specific thing is not contained in Tiangong Kaiwu, it can be deduced by analogy with the process ideas in the book.
First, the method of halogenation. Or it can be prepared by halogenation reaction. Halogenation reactions have also been traced in ancient times, such as the preparation of metal halides. Using suitable aromatic hydrocarbons as substrates, under suitable conditions, the halogenating agents of chlorine and fluorine can react with them. The aromatic hydrocarbons can be placed in a special ceramic kettle or a metal kettle, which needs to be airtight and can withstand a certain temperature and pressure. The temperature in the kettle should be raised to a suitable range by heating, and a halogenating agent should be added, or the reaction should be catalyzed by natural light sources such as sunlight, or a natural catalyst should be found to accelerate the reaction process. In this way, chlorine and fluorine atoms can be introduced into the specific position of aromatics. After subsequent separation and purification, 2% 2C4-dichlorofluorobenzene can be obtained.
Second, the method of substitution. If you find a compound containing a specific group, replace some of the groups with chlorine and fluorine atoms. In a spacious workshop, the substrate can be mixed with a halogenated reagent using water or an organic solvent as a medium. The color change and odor change of the solution can be observed according to the ancient method to judge the reaction process. When the reaction reaches a suitable level, the reaction product can be separated by filtration, distillation and other separation techniques, and then refined several times, or pure 2% 2C4-dichlorofluorobenzene can be obtained.
Although the "Tiangong Kaiwu" does not describe the preparation method of this compound in detail, the ancient chemical process wisdom may be used to find a way to prepare it.

2% 2C4-diethylhexanol. When storing and transporting this substance, many matters need to be paid attention to.
It is flammable. When storing, it must be placed in a cool and ventilated warehouse, away from fire and heat sources. The storage temperature should not exceed 37 ° C. It should be stored separately from oxidants and acids, and should not be mixed. The warehouse needs to be equipped with suitable materials to contain leaks. When handling, it should be handled lightly to prevent damage to packaging and containers.
During transportation, it is necessary to follow the transportation rules of chemical dangerous substances. Transportation vehicles should be equipped with corresponding varieties and quantities of fire equipment and leakage emergency treatment equipment. It is best to transport in the morning and evening in summer to prevent sun exposure. Road transportation should follow the prescribed route, do not stop in residential areas and densely populated areas. It is forbidden to slip away during railway transportation. Transportation tools should be thoroughly cleaned and washed before and after loading and unloading, and it is strictly forbidden to mix organic matter, flammable substances and other impurities.
Storage places should have obvious warning signs such as "no fireworks", and be equipped with complete ventilation equipment and fire protection facilities, so that in the event of an emergency, they can respond quickly and prevent accidents from expanding. During transportation, drivers and escorts also need to be familiar with the characteristics of this object and emergency treatment methods to ensure the safety of the transportation process.