5-Bromothiophene-2-boronic acid

Borax, its main use is quite wide. In the medical way, it has the ability to clear away heat and detoxify. Ancient physicians often used borax as medicine to treat sores on the mouth and tongue, swelling and sore throat. "Compendium of Materia Medica" says: "Borax, sweet taste, slightly salty, cold in nature, non-toxic. It is used to relieve phlegm, stop coughing, and solve the crux of the throat." Because of the cold nature of borax, it can relieve the heat poison of burnt, make the throat clear, and the mouth sores gradually heal.
In industrial affairs, borax is also an important raw material. In glass manufacturing, it can help glass enhance heat resistance and transparency. When craftsmen make glazed utensils, borax is added, and the glazed glass becomes more crystal clear, and can better withstand high temperature and is not easy to break. In the firing of ceramics, borax can be used as an additive for glazes, making the ceramic surface smooth and delicate, and the color is brighter.
In daily life, borax also has wonderful uses. In the past, when washing clothes, occasionally adding a little borax can increase the power of decontamination and make clothes cleaner. And borax has the power of anti-corrosion. It can also make a little effort to preserve food and prevent food from spoiling too quickly.
However, it should be noted that although borax has many functions, it is toxic. If misused or overused, it is harmful to human health. Therefore, when using it, be careful to follow the law and weigh the pros and cons, in order to obtain its benefits and avoid its harm.

The method of making butyric acid has been known in ancient times, and there are many methods, which are now detailed by you.
First, it is fermented with lactic acid. Take the milk of good quality, put it in a cleaner, add lactobacillus, seal it, and place it in a warm place. The bacteria eat lactose in the milk, and ferment produces lactic acid. Lactic acid accumulates and butyric acid gradually forms. This is a natural fermentation method. Although it is easy to implement, it is difficult to control for a long time.
Second, chemically synthesize it. Make butanol, carbon monoxide, and water react at high temperature and high pressure with the help of a catalyst. Butanol combines with carbon monoxide and water to form butyric acid. This way is fast, but it requires delicate tools and precise control, and chemical agents or residual, which is related to food safety, so caution is required.
Third, by bioengineering techniques. Select the strain that produces butyric acid and carefully cultivate it in a special medium. The strain metabolizes, and the butyric acid is produced. Following the method of separation and purification, high-purity butyric acid is obtained. This technique is accurate and efficient, but the strain screening and cultivation is not easy, and it is demanding on environmental conditions.
Fourth, it is made by hydrolysis of oil and fat. Take suitable oil, add alkali to hydrolyze, and form fatty acid salts and glycerol. After adjusting the acid, the fatty acid precipitates. After distillation, fractionation and other processes, butyric acid can be obtained. Oil is easy to obtain, but the process is complicated and energy consumption is quite large.
All these methods have advantages and disadvantages. When choosing a method, consider the ease of raw materials, the cost, the simplicity of the process, the purity of the product and the environmental protection, and weigh and decide before the appropriate method can be obtained to produce butyric acid.

Borax is a common mineral traditional Chinese medicine. Its physical properties are quite unique, with the following numbers:
- ** Morphological characteristics **: The natural producers of borax are mostly dense blocks or soil-like aggregates. After artificial refining, it is a colorless and transparent crystal or a white crystalline powder. Just like the crystal clear ice crystals, pure and free of impurities, shining with a unique luster under light.
- ** Color and Transparency **: Pure borax crystals are colorless and transparent, just like clear autumn water, without variegation. If it contains impurities, it will appear a little white. Its transparency is quite high, and when the light penetrates, it seems to be able to penetrate the pure world inside it. < Br > - ** Hardness **: Borax has a low hardness, and it can leave marks on its surface with a light scratch of the fingernail. Just like that soft thing, light force will change the shape. Compared with many hard minerals, the texture is obviously much softer.
- ** Cleavage and Fracture **: Borax has good cleavage and is easy to break into thin sheets along a specific direction. Its cleavage surface is smooth and bright, like a mirror surface. The fracture is shell-like, with slightly curved edges, just like the shape of the shell, which is unique.
- ** Density **: The density of borax is relatively small, about 1.73 grams/cubic centimeter. Holding it in the hand, it feels light, unlike those heavy metal minerals, giving people a light and agile experience.
- ** Solubility **: Borax is easily soluble in water, and in hot water, it dissolves faster. When the borax is put into water, it is like ice and snow meeting the warm sun, quickly dissipating into an invisible solution and turning into a uniform solution. And its aqueous solution is alkaline, and its characteristics can be known by testing with pH test paper.
- ** Melting point **: Borax has a low melting point, about 741 ° C. When heated to a certain extent, it will gradually soften and melt, changing from solid to liquid, just like the melting of ice and snow, and the shape changes wonderfully.

Those who store alum stone have a strong nature, and they should be paid attention to in all matters of storage and transportation.
Store alum stone, the first dry place. Its properties are easy to deliquescence, if it is in a wet environment, it is easy to melt water and lose its nature. Therefore, it is necessary to choose a dry place, hold it with tiles and porcelain, and seal it tightly so that it is not disturbed by moisture. If you use other utensils to hold it, you also need to check its material, and do not violate the alum stone, so as to prevent the risk of corrosion.
When transporting, you can't be careless about the upheaval of the road. Alum stone is brittle, and if it vibrates too much, it is easy to break. It is to drive smoothly in a carriage, and move slowly to avoid rough and bumpy roads. And when transporting the alum stone, it should be handled with care, and it should not be used recklessly, so as not to damage its shape.
Furthermore, alum stone has certain toxicity, and the storage and transportation places should be kept away from the places where humans and animals often go. To prevent accidental consumption and misuse, causing disasters. Food, drinking water and other objects should not be placed around it to prevent pollution. If there is any accidental leakage, it needs to be cleaned up in time, and the person who cleans it should have protective equipment to prevent the skin from touching it, mouth and nose sucking it and suffering from it.
Storage and transportation of alum stone, pay more attention to dryness, stability and safety, so as to ensure its quality and avoid all kinds of hazards.

At present, the price of mirabilite and acetic acid in the city varies according to its quality, quantity, land and supply and demand conditions.
Mirabilite is mainly sodium sulfate decahydrate, which is used in industry, medicine, chemical industry and other fields. Industrial mirabilite, if the quantity is huge and the quality is suitable for ordinary people, its price is usually relatively easy. In the market of chemical raw materials, the price per ton may be between hundreds of yuan. However, the price of medical mirabilite, due to strict requirements on purity and impurities, must be higher than that of industrial users, and the price per kilogram may reach several yuan or even tens of yuan. And the distance of origin and the cost of transportation also affect its price. If the origin is close to the user and the transportation cost is saved, the price may be slightly lower; if it is far away and inconvenient to transport, the price will increase.
As for acetic acid, it is an important organic chemical raw material and is indispensable in the food, chemical, pharmaceutical and other industries. Food-grade acetic acid, because it is related to food safety, has strict quality control, and its price is relatively high. In the city where food is added, the price per liter may be in the tens of yuan. Industrial acetic acid, depending on its purity, has different prices. High-purity industrial acetic acid, due to the complex preparation process and high cost, may cost thousands of yuan per ton; while ordinary purity, the price may be slightly lower, and it is also around 1,000 yuan per ton. Market supply and demand are also the main reasons for pricing. If there is a large number of people who need acetic acid for a while, but the supply is insufficient, the price will rise; if more is produced and less is needed, the price will decline.
To sum up, the market prices of mirabilite and acetic acid are intertwined by multiple factors, and the industry needs to carefully observe the changes in the market before they can know the direction of their prices.