5-bromothiophene-2-carbonitrile

5% alcohol is the wine made by the ancient method, and the purpose of the wine is very wide.
It is also a good material of the ancient times. Its primary use is in the Tao. The "Materia Medica" has the effect of promoting blood circulation and removing blood stasis. If a person is beaten by bruises, causing blood stasis to accumulate, and pain to be tolerated, it is advisable to take the same amount, or take it with frying, or apply it externally, which can make the blood stasis dissipate and the pain to be suffered. In the past, there were martial artists who were accidentally injured by martial arts, and their limbs were green and green, and they applied it for a long time, and the pain was relieved and stopped, and the health was as good as before.
Furthermore, the taste of the food is also good. Those who make good use of the food can increase the taste of the dishes. For example, when cooking, it is accompanied by rice, which can remove the fishy smell of rice, add its beauty, and make the meat taste mellow, and the diners will not taste it. And it is used in cooking food, which can make the ingredients more tasty, long-lasting and not rotten. In addition, in the ancient handmade art, there is also a wonderful use. In the dyeing workshop, the combination of rice with ordinary dyes can make the dyed color last longer. The quality of the material is not only good, but also the ground is softer, which is deeply loved by artisans.
Therefore, it plays an important role in food, food and work, and is an indispensable good thing in ancient times.

The method of acetyl is ancient. First, alcohol acetate is used, followed by catalysis, and azeotropic is added. This method of esterification is also used. Said: "Acetate alcohol, catalyzed and combined to form acetyl ester, water is also produced." The opposite is also true, precise control, both degree and quantity are required. Under the same conditions, the two are phased to obtain acetyl, which can be perfumed and dissolved.
Second, from ethylene, acetaldehyde is first formed, and then oxidized. Ethylene and oxygen, the catalytic effect, obtain acetaldehyde. However, acetaldehyde is oxidized and acetyl with the help of catalysis in a specific environment. This way, ethylene is easy to obtain, and the reverse is orderly. However, it needs to be carefully managed. The activity of ethylene is essential for catalysis, in order to form acetaldehyde, and to oxidize it, it is also necessary to control the components, and the retention rate is good.
There is also a method of reacting with acetyl chlorohydrin alcohol or phenol. Acetyl chlorohydrin activity, when encountering alcohol or phenol, quickly reacts to form acetyl derivatives. However, acetyl chloride has the property of decay, and it must be prevented when it is operated. It needs to be used in a suitable device, in a cold and dry environment, so that the alcohol or phenol meet, so that the alcohol or phenol can be obtained.
Furthermore, use acetic anhydride alcohol, phenol and other reactants. Acetic anhydride reactants can also be obtained. Its reverse phase is peaceful, but it is also necessary to check its components. The quality of acetic anhydride, the quality of the reaction, and the quality of the product all affect the quality of the product.
The method of acetyl, each has its own wonderful, according to the required materials, the convenience of raw materials, the cost, etc., the appropriate method can be used to improve the situation.

"Tiangong Kaiwu" has a saying: "The genus of hardware has many types and special functions. Today's sodium chips have unique physical properties."
Sodium chips are soft and light, silver-white in color, shiny, exposed in the air, and change in an instant, because they are very lively. Its specific gravity is slightly smaller than that of water, and when thrown into the water, it is like a dragon playing with waves, hissing, and bursting with fire all over the body. This is because of the rapid reaction between sodium and water.
The melting point of sodium chips is quite low, and when heated, they melt into silver droplets, like a pearl rolling. Its electrical conductivity is good, although it is not as outstanding as metals such as gold, silver and copper, it should not be underestimated. It may have its own unique characteristics in the application of circuit conduction.
In addition, the ductility of sodium chips also has its own characteristics. Although it is not like gold and silver, it can be hammered into extremely thin pieces, but with a little external force, it can also be extended and deformed, showing the commonality of metals.
Sodium chips easily react with oxygen, water and other substances in the air, so they need to be properly stored and often placed in kerosene to keep them isolated from the outside world, so as to ensure their characteristics.
The physical properties of sodium chips are unique, and they have potential applications in many fields. Their lively nature and special state provide many opportunities for craftsmen to explore and innovate. Over time, they may be able to make great achievements in the manufacture of technical utensils and the preparation of medicinal pills.

In today's world, hardware is widely used, and everyone wants to know the value of barium sand. Hardware, gold, silver, copper, iron, and tin are also called, and barium sand, although not among the traditional hardware, is also of great use in today's industry.
Considering the past, the price of hardware changes with the changes of the world. In troubled times, it is expensive, and in prosperous times, it is peaceful. However, the emergence of barium sand is not long ago, and the ancient classics have rarely contained it, so it is difficult to find old examples to measure its price.
What is the market value of barium sand today? It depends on its quality, its quantity, and its needs. If its quality, purity and quantity are abundant, and the world needs it, the price will be high; if the quality and quantity are small, and the demand is thin, the price will be low. And in today's world, industry and commerce are prosperous, science and technology are new, and barium sand is used in chemical, pharmaceutical, and electronic industries. The wider the demand, the higher the price.
Recently, the market of barium sand, either due to the amount of minerals, or due to changes in the current situation, or due to changes in technology, the price often fluctuates. Merchants and merchants all rely on the supply and demand of the time to observe the market and change the degree to seek their own benefits. However, if you want to know the exact value, you need to consult the people in the market, the miners and smelters, or the places where you trade, and the market report can be obtained. In short, the market value of barium sand changes due to many factors, and it cannot be generalized.

When storing and transporting methyl ether, all things must be done with caution. Methyl ether is flammable and dangerous, and if it is not careful, it will cause serious disaster.
When storing, the first location should be selected. When choosing a cool and ventilated place, away from fire and heat sources. This is to avoid the sudden rise of pressure due to heat and the risk of explosion. The temperature of the warehouse must also be strictly controlled, and it should not be too high to prevent the state of methyl ether from being unstable. There should be obvious no fire signs around, so that everyone knows the danger.
Furthermore, the choice of container is very important. Special and pressure-resistant containers must be used to ensure good sealing and no leakage. On the container, the name, characteristics and precautions of the methyl ether should be clearly marked for identification. It is necessary to check the container frequently on weekdays to see if it is damaged, rusted, etc. If so, replace or repair it quickly.
When transporting, do not be sloppy. The transportation vehicle must meet safety standards and be equipped with fire extinguishing, anti-static and other devices. When loading, the methyl ether container must be placed firmly to prevent it from being damaged by bumps and collisions on the way. During driving, drivers should drive slowly to avoid densely populated and traffic congestion.
Escorts must also be familiar with the characteristics of methyl ether and emergency response methods. In case of emergencies, such as leaks, etc., they can quickly respond according to established policies. First evacuate the surrounding crowd, set up a warning area, and then take corresponding measures such as plugging and dilution. Do not panic.
In short, the storage and transportation of methyl ether is all about safety, and it is necessary to strictly follow the regulations and not slack at all, so as to ensure safety.