3 - [ (4 - ethylphenyl) methoxy] - 1,2,4,5 - tetrafluorobenzene, this substance is widely used. In the field of pharmaceutical synthesis, it is often used as a key intermediate. The unique structure of Gain allows the introduction of other functional groups through specific chemical reactions, and then the construction of complex molecular structures with specific pharmacological activities. For example, when developing new antidepressant drugs, this is used as the starting material to build the core parent nucleus through multi-step reactions, and then modify the side chain to optimize the ability of the drug to bind to the target and improve the curative effect.
In the field of materials science, it also has important functions. In the preparation of high-performance fluoropolymers, it can participate in the polymerization reaction as a comonomer, endowing the polymer with excellent properties, such as improving the chemical resistance of the material, so that the material can still maintain the structure and performance stability under harsh chemical environments such as strong acids and alkalis; enhancing the thermal stability of the material, broadening its application range in high temperature environments; improving the electrical properties of the material, suitable for the manufacture of insulating materials for electronic components, etc.
In addition, in the field of organic synthetic chemistry research, as aromatic compounds with special structures, it provides an ideal substrate for the study of organic synthesis methodologies. Chemists can explore new reaction paths in which they participate, develop novel synthesis strategies, enrich the methods and means of organic synthetic chemistry, and promote the continuous development of organic synthetic chemistry.

3- [ (4-ethylphenyl) methoxy] -1,2,4,5-tetrafluorobenzene is an organic compound. Its physical properties are as follows:
Viewed, it is often a colorless to light yellow liquid. Due to the arrangement and interaction of the atoms in the molecular structure, it does not produce significant absorption of visible light, so it presents this color state.
When it comes to boiling point, due to the intermolecular force, fluorine-containing atoms are endowed with properties that make their boiling points within a specific range. Fluorine atoms have high electronegativity, which can affect the van der Waals force between molecules, resulting in their boiling points being different from ordinary benzene derivatives. Although the exact boiling point needs to be accurately determined according to the experiment, it can be roughly inferred that the boiling point of fluorine atoms is higher than that of ordinary benzene ring compounds due to the increase of intermolecular forces.
As for the melting point, it is also affected by the molecular structure. The tetrafluoride substitution combined with the presence of methoxy and ethylphenyl groups changes the way the molecules are piled up, and the melting point is unique. The interaction between fluorine atoms and the steric resistance of the substituents all play a role in the orderly arrangement of molecules, so that the melting point is at a specific value.
In terms of solubility, since it is an organic compound, it has good solubility in common organic solvents such as dichloromethane, chloroform, and ether according to the principle of similar miscibility. Because these organic solvents and the compound molecules can form similar intermolecular forces, such as van der Waals forces, dipole-dipole interactions, etc., to promote dissolution. However, the solubility in water is not good, because the molecule as a whole has strong hydrophobicity, the force between water molecules and the compound molecules is weak, and it is difficult to overcome the intermolecular forces of the compound to disperse in water.
The density depends on the type and number of atoms in the molecule. The relative mass of fluorine atoms is relatively large, and its spatial distribution affects the degree of molecular packing. Under the combined action, its density has a specific value, which is generally higher than that of water. Because the atoms in the molecule are closely arranged and contain relatively heavy fluorine atoms.

3 - [ (4 -ethylbenzyl) methoxy] - 1,2,4,5 -tetrafluorobenzene is an organic compound. In this compound, benzyl is substituted by ethyl, methoxy is connected to benzyl, and there are four fluorine atoms on the benzene ring.
Its chemical properties, because the benzene ring has fluorine atoms, it has a certain electronegativity, which affects the molecular polarity and reactivity. Fluorine atoms have strong electron absorption ability, which reduces the electron cloud density of the benzene ring, weakens the activity of electrophilic substitution, and makes it difficult to react with electrophilic reagents, such as halogenation, nitrification, sulfonation, etc. However, under specific conditions and suitable catalysts, such reactions can still be carried out.
Contains methoxy group, methoxy group is the power supply substitution group, which can increase the electron cloud density of benzene ring to a certain extent, and promote the electrophilic substitution reaction to a certain extent. However, due to the strong electron-absorbing effect of fluorine atoms, the overall electrophilic substitution activity is still low. Under basic or acidic conditions, the methoxy group may undergo reactions such as hydrolysis to produce corresponding phenols or alcohols.
In addition, the carbon-fluorine bond in the molecule has high energy, is relatively stable, and is not easy to break under general conditions. However, under special conditions such as high temperature and strong reducing agent, the carbon-fluorine bond may break, and the reaction of fluorine atom being replaced by other groups occurs. And due to the interaction of different groups in the molecular structure, the compound exhibits unique reaction selectivity and reaction path when participating in the reaction.

To prepare 3- [ (4-ethylbenzyl) methoxy] -1,2,4,5-tetrafluorobenzene, the following ancient method can be used.
First take an appropriate reaction vessel, wash and dry it. Add a reactant containing 4-ethylbenzyl structure, which needs to be purified in advance to ensure the purity and efficiency of the reaction. Then add reagents that can introduce methoxy groups, such as specific methoxylating reagents, which need to be accurately weighed by stoichiometry, usually in a certain proportion according to the number of moles of the reactant, to ensure that the reaction is fully carried out.
The reaction environment is also crucial and needs to be carried out at a specific temperature and pressure. The temperature can be precisely controlled by a water bath or an oil bath to maintain the reaction system within a suitable range, such as [X] ° C. This temperature is determined by repeated experiments and theoretical calculations, which can promote the equilibrium of the reaction rate and yield. In terms of pressure, either under normal pressure or adjusted to a specific pressure value according to the reaction characteristics, it is strictly controlled by pressure equipment.
At the same time, in order to accelerate the reaction process, an appropriate amount of catalyst is often added. This catalyst should have high catalytic activity and selectivity, and no adverse effects on the reaction system. During the reaction, continuous stirring is required to allow the reactants to fully contact and ensure a uniform reaction.
After the reaction is completed, the product needs to be separated and purified. First extract with a suitable organic solvent, transfer the product to the organic phase, and then remove impurities through distillation, recrystallization and other steps to improve the purity of the product, and finally obtain the target product 3- [ (4-ethylbenzyl) methoxy] -1,2,4,5-tetrafluorobenzene. The whole process requires fine operation and attention to the details of each link to ensure the smooth reaction and the quality of the product.

I think what you are asking is about the price range of 3- [ (4-ethylphenyl) methoxy] -1,2,4,5-tetrafluorobenzene in the market. However, it is not easy to know the details. The price of this compound often varies due to multiple factors.
First, the difficulty of preparing this compound affects its price. If its synthesis requires complicated steps and rare raw materials, the cost will be high, and the price will also rise.
Second, the market supply and demand is also the key. If the demand for this product is strong and the supply is limited, the merchant will raise the price; conversely, if the supply exceeds the demand, the price may fall.
Third, the quality also affects the price. For high purity, the natural price is high; for less purity, the price is also different.
In addition, different suppliers have different pricing due to their own costs and business strategies. However, I do not have the exact market information, so it is difficult to specify its price range. You may need to consult the chemical raw material trading market, relevant e-commerce platforms, or communicate with industry merchants and experts to get a more accurate price.