3,6-dichloro-1-benzothiophene-2-carboxylic acid

Well, this is a question about the chemical properties of boric acid. Boric acid, which is a white crystalline powder, or a colorless scale-like crystal with a slight pearl luster, has a slippery and odorless feel.
The acidity of boric acid is weak, and it is weakly ionized in water. However, its acidity is different from that of ordinary acids. It is not due to the ionization of hydrogen ions by its own hydroxyl groups, but the interaction with water molecules, receiving the ionized hydroxide from water, so that the concentration of hydrogen ions in the solution increases and becomes acidic.
Furthermore, boric acid has a certain solubility, and its solubility in hot water is greater than that in cold water. This property is also related to its molecular structure. There are hydrogen bonds between its molecules, and some hydrogen bonds are destroyed in hot water, resulting in increased solubility.
Boric acid has high stability and is not easy to decompose under normal conditions. However, when exposed to strong heat, water can be lost to form metaboric acid, which can be converted into boronic anhydride when further heated.
Boric acid still has bacteriostatic effects and can be used in the field of medicine, as a disinfectant, preservative, etc. In industry, it is also used in glass, ceramics and other industries to improve the heat resistance and transparency of glass and improve the properties of ceramics.
From the above, it can be seen that boric acid has unique chemical properties and has important applications in many fields. It is a chemical substance that cannot be underestimated.

There are many ways of carboxylic acids. One is the oxidation method. Such as the oxidation of alcohol or aldehyde, it can be obtained. Alcohols can be oxidized by suitable oxidation methods, such as high acid and heavy acid. Under suitable conditions, carboxylic acids can be obtained. The oxidation of aldoxides is also commonly used in weak oxidation methods, such as Torres and Filin, which can be easily obtained. Both of these are used to increase the oxygen atom on the carbon, causing it to oxidize and increase, and form carboxylic acids.
Second, the hydrolysis of nitriles is also. When nitriles meet acids or acids, they can be hydrolyzed and reacted, and carboxylic acids can be reduced. With acid catalysis, nitriles are first formed, and carboxylic acids are hydrolyzed; with catalysis, carboxylic acids are formed, and then oxidized to carboxylic acids. In this way, a carboxyl group can be introduced into a compound containing a cyanide group, which is used in the synthesis of organic compounds.
Third, the Grignard method. Grignard's carbon dioxide is reversed and hydrolyzed to obtain a carboxylic acid. First, Grignard's acid is obtained in aqueous ethyl ether. This method is very active and can be added to carbon dioxide to generate a carboxylic acid. This method can increase the amount of carbon. It is useful for the synthesis of special carboxylic acids.
Fourth, the oxidation of aromatic acid. If the aromatic acid contains an alpha-atom, it can be oxidized by oxidizing a carboxylic group such as a high acid. It is not short, and the carboxyl group is usually oxidized. This method is commonly used in the synthesis of aromatic carboxylic acids.
Where this method is used, it is the usual method of carboxylic acids, each with its own characteristics, depending on the required carboxylic acid, the ease of reaction parts and raw materials, etc., the appropriate method is carried out.

"Tiangong Kaiwu" says: "Acid is the disposition of all things." Carboxylic acids are a class of compounds containing carboxyl groups, and their applications are quite extensive, showing in many fields.
First, in the chemical industry, carboxylic acids can be said to be very important. Take acetic acid as an example, this is a very common carboxylic acid. In organic synthesis, it is often used as a solvent, and many chemical reactions rely on its excellent solubility to advance smoothly. And acetic acid can be used to prepare acetic acid fibers. This material shines brightly in the textile industry, resulting in fabrics with good texture, comfort and beauty. Furthermore, adipic acid is also an important chemical raw material, which is widely used in the synthesis of nylon. Nylon is widely used in industry and life, such as making ropes, engineering plastics, etc., which contributes to the development of modern industry.
Second, in the food field, carboxylic acid is also indispensable. Citric acid is a commonly used sour agent in the food industry, and is widely used in beverages, candies, etc. It can give food a fresh and sour taste, enhance food flavor, and enhance appetite. And citric acid has good chelation properties and can be used as a food preservative to prolong the shelf life of food and ensure food safety. Another example is malic acid, which is also a common food sour agent. It is widely used in fruit-flavored foods, which can simulate the sour taste of natural fruits and make food flavors more realistic.
Third, in the field of medicine, carboxylic acids make excellent contributions. Aspirin is a classic drug, and its main component is acetylsalicylic acid, which is a carboxylic acid derivative. It has antipyretic, analgesic and anti-inflammatory effects. It is widely used in clinical applications and can relieve various pain symptoms such as headache, toothache, and joint pain. It is also used to prevent cardiovascular diseases. The structure of many antibiotic drugs also contains carboxylic acid groups, which have a profound impact on drug activity and stability, and escort human health.
It can be seen that carboxylic acids play a key role in many fields such as chemicals, food, and medicine. They are closely related to our lives and cannot be ignored.

Today I have a question, thirty-seven-six, carbon dioxide, one, the matter of England and Geely, and two, the market price of citric acid? I try to solve it for you.
For English and Geely, it is also called the United Kingdom of Great Britain and Northern Ireland. As for citric acid, its market price often varies with time, place and quality. In the market, pharmacies, or have different prices. And its use is wide, in food and drink, medicine, chemical industry, etc., different uses, the price is also poor.
If the citric acid used in food and drink, its quality is pure, the market price may range from a few catties to tens of dollars. If the quality is good and it is fine processing, the price may be slightly higher. And for chemical industry and other industries, the price varies according to the quantity and grade. If you buy in large quantities, the price can often be negotiated. And the trade in various places, due to taxes, transportation and other fees, the price also fluctuates.
Market prices are not constant, sometimes rising, sometimes falling. To know the exact price, when you go to the market and ask about it in person, or check the price on the business network, you can get a near-real price. This is the situation of the market price of citric acid.

"Tiangong Kaiwu" has a saying: "At present, people don't use it, so they don't carry it. Taosha also comes out of barbarian caves, and it is formed by brine liquid."
However, although the storage conditions of borax are not detailed in the book, it is common sense that borax likes dryness and should be stored in high dryness, avoiding water and fire. Cover borax is easily soluble in contact with water. If it is in a humid place, it will melt into water and lose its properties. And borax is also easy to decompose when heated, so it must be kept away from the high temperature of the fire candle to ensure its quality.
Furthermore, the preservation of borax should also pay attention to isolating the air. Although the properties of borax are relatively stable, it may be exposed to the air for a long time, or it may react with some of its components, causing it to deteriorate. Therefore, it can be avoided by storing it in a sealed device.
So many things, although "Tiangong Kaiwu" does not specify the storage conditions of borax, it is deduced according to material properties and common sense. High dryness, sealing, and heat avoidance are essential for proper storage of borax.