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What are the main uses of 2,3,5,6-tetrafluoro terephthalic acid?
2,3,5,6-tetrafluoroterephthalic acid, with fluorine arranged on the ring, is stable and moderately active, so its use is extremely wide.
First, it is a precursor of high-performance polymers: it can be used to synthesize fluorinated polyesters, polyamides and other polymer materials, giving them excellent heat resistance, chemical corrosion resistance, and aging resistance, and is widely used in electronics, aviation, automobiles and other fields.
Second, it is functional material manufacturing: as a key raw material in special functional membranes, coatings and composite materials, it improves their hydrophobic, wear-resistant and electrical insulation properties.
Third, it is a pharmaceutical and pesticide intermediate: the presence of fluorine atoms improves molecular stability and biological activity, and helps synthesize high-efficiency drugs and pesticide molecules.
Fourth, it is an organic synthesis reagent: it can be used as a base for the synthesis of various derivatives, facilitating the subsequent introduction of other functional groups.
What are the physical properties of 2,3,5,6-tetrafluoro terephthalic acid?
For all tangible things, their texture can be identified by their color, state, weight, and solubility. 2,3,5,6-tetrafluoroterephthalic acid is a white crystalline powder with fine and solid crystals and a pure texture.
Its melting point is relatively high, about 330 degrees, indicating that its structure is stable and the fluorine interaction between molecules is close. The molecular weight is about 208.08, and the density is moderate, about 1.65 grams per cubic centimeter.
This substance is difficult to dissolve in water, but slightly soluble in polar organic solvents such as ethanol and ethyl acetate, indicating that it is highly hydrophobic, and the fluorine arrangement makes its surface tension larger and not easy to volatilize.
It is solid at normal temperature and pressure, easy to store, durable, stable in nature, and not easy to weather and deteriorate. The powder is fine, and dust should be prevented from entering the nose during operation.
What are the chemical properties of 2,3,5,6-tetrafluoro terephthalic acid?
2,3,5,6-tetrafluoroterephthalic acid has a tetrafluoroethylene arrangement of benzene rings and a functional dicarboxylic acid. It is strong in nature, but the carboxyl group is active and has reaction potential.
Its fluorine link makes the molecule highly electronegative and extremely stable. It is not easily disturbed by oxidation and reduction, and is resistant to acid and alkali corrosion. However, the carboxyl group can react with alkali to form salts or esters.
In organic synthesis, the carboxyl group can react with alcohols to form ester derivatives; it can combine with amines to obtain amide products, which are the main ways to synthesize polymers and pharmaceutical pesticide intermediates.
In addition, under high temperature conditions, the carboxyl group can be dehydrated to form anhydrides, which is convenient for the preparation of multifunctional polymers.
Although this substance is stable, it can be substituted or reduced under strong reducing agents or special catalysts. The process is exquisite and requires professional operation.
What are the synthesis methods of 2,3,5,6-tetrafluoro terephthalic acid?
2,3,5,6-tetrafluoroterephthalic acid, with tetrafluoro on the ring, has a rigorous structure and requires ingenuity in preparation.
First, the precursor material, which is a tetrafluorobenzene derivative, or tetrafluorobenzoic acid through multi-step reactions, or starting from tetrafluorobenzene dicarboxaldehyde.
Second, the arrangement and regulation of fluorine, with the help of fluorination reagents or fluorine substitution reactions, the fluorine is safely placed at the 2, 3, 5, and 6 positions to ensure symmetry and purity.
Third, the introduction of carboxyl groups, which is often done by oxidation, such as oxidation of the side chain of the benzene ring, or by treating the corresponding aldehyde or alcohol with an oxidant (such as potassium permanganate, chromate) to obtain a dicarboxyl structure.
Fourth, the purification process, repeated crystallization and purification, removal of impurities, and thermogravimetric analysis are often used to confirm its thermal stability.
Fifth, the reaction conditions, mild or medium-high temperature control, and the use of solvents with moderate polarity to ensure efficient reaction and few by-products.
What is the price range of 2,3,5,6-tetrafluoroterephthalic acid in the market?
Today there is 2,3,5,6-tetrafluoro-terephthalic acid. What is the market price? Let me try it for you.
However, the price of the market often changes from time to time, varies from quality to quality, and varies from quantity to quantity. The price of this chemical substance may vary according to the quantity requested by the buyer. If the quantity is small, the price may be slightly higher; if the buyer needs a lot, the merchant may give a discount, and the price will be lower.
And its price is also related to the quality. Refined and pure, the price must be higher than the product with slightly more impurities. And the supply and demand of the market also affect its price. If there are many people who need it for a while, but the supply is insufficient, the price will rise; on the contrary, if the supply exceeds the demand, the price will drop.
Although it is difficult to determine the exact price, according to past market conditions, the price per gram may be between tens and hundreds of dollars. This is only a rough estimate. To know the exact price, you must consult the merchants in various cities or check the price list of chemical materials before you can obtain it.