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What are the main uses of 4-bromobenzothiazole?
4- The main purpose of taking pills is to regulate the body and treat diseases as described in the "Heavenly Works". In the whole body of people, or due to loss of food, or due to cold and heat, or due to emotion, diseases occur. In this case, the pills have their own uses.
, its function is to facilitate the stool, so that the evil of the stomach can be discharged. If people eat too much, the spleen and stomach cannot be melted, and the stomach can be eaten in the stomach, causing abdominal pain and constipation. Another example is to feel the evil, which is caused by the disease, such as the appearance of the disease, dry mouth, stool, etc.
And the pills can be used to treat the evil. Its well-made, it is easy to take and preserve. For some chronic diseases, or those who need to be treated for diseases, the pills are especially suitable. Such as the pills that are beneficial, they can nourish the blood and treat the disease, so that the body and the weak can be improved. And the action of the pills is harmonious, and they can be taken in a period, so as to cure the root cause.
The two are taken, and they can be used for their own reasons. First, to get rid of the evil, so that the evil can have a way out, and the pills can be used to correct the disease, which is beneficial. In this way, evil goes to righteousness and peace, and the body can be treated by Kangtai. Therefore, taking pills is one of the important methods for treating the body. It can be used in the severity and urgency of the condition to obtain good results.
What are the synthesis methods of 4-bromobenzothiazole?
4-Nitroquinoline-pyridine is an important compound for synthesis, and there are many synthesis methods. Today, imitating "Tiangong", it is described in the text as follows:
One method is to use the pyridine derivative of Nitrophenol compound as the starting material. The first pyridine derivative is placed in the reverse kettle, and the kettle is dried over a charcoal fire to remove water vapor. When the kettle is dry, add the solution of the refined one, and the solubility is determined and the solubility is good, such as dichloromethane or toluene. Mix well, so that the pyridine derivative is fully dissolved.
However, the phenol compound is added to the kettle, and the mixer is used to keep mixing, so that the mixing is uniform. In this case, adding a specific catalyst, the amount of catalysis needs to be precisely controlled, and the reaction effect is more or less obvious. Catalytic gold complexes, such as gold or gold complexes, can effectively promote reaction.
Add a reaction kettle, and control the reaction temperature by oil bath or sand bath, so that the reaction temperature can be controlled at the appropriate temperature. Usually, this reaction temperature should be maintained at 100-150 degrees Celsius. During the reaction process, closely observe the reaction temperature of the kettle, such as colorization, bubble formation, etc.
The reaction temperature can be maintained for several hours, and when the reaction is completed, cool the reaction mixture. Extract the mixture, such as ethyl acetate, with the solution of the reaction temperature. Extract the mixture, and use a separation funnel to separate the water phase from the water phase. The water phase is dried with water sulfuric acid to remove the water retention.
Then the solution is removed by steaming, and the crude product is obtained. The crude product is purified by column precipitation, and the raw material is washed by washing, and the 4-quinoline-pyridine can be obtained.
Another method is to use the nitrogen-containing chemical compound containing phenol groups as the raw material of the aldehyde compound. The first one is mixed in the reactor in a certain proportion, and the catalytic catalyst is added, such as carbonate or oxidation. The catalytic catalyst can be used to reverse the acidity of the system and promote the reaction.
At an appropriate temperature, such as 80-120 degrees Celsius, add the reaction mixture. The reaction time also needs to be mixed. After the reaction, with the steps of cooling, extraction, drying, steaming, column analysis, etc., 4-quinolinopyridine was obtained.
What are the physical properties of 4-bromobenzothiazole?
Amalgam alloys are mixtures formed by the fusion of mercury phases, and their physical properties are special.
First of all, the melting rate of mercury is very low, -38.83 ° C, and the melting rate of mercury is high, 327.46 ° C. The two form an alloy. The melting rate varies depending on the proportion of components. However, in terms of phase, the melting rate of the alloy decreases. This is a general characteristic of the alloy. Due to the interaction of different atoms, the lattice is changed, resulting in less energy required for melting.
The density of mercury is 13.59 g/cm ³, and the density of mercury is 11.34 g/cm ³. The density of the alloy also depends on the proportion of components, which is roughly between the two. If the mercury content is high, the density of the alloy is close to that of mercury; if the mercury content is high, the density is close to the density of mercury.
Its hardness is also reduced.
The hardness of the mercury liquid can be said to be high, and the hardness of the alloy can be said to be high.
The two form an alloy. Due to the change of atomic arrangement, the hardness of the alloy is often higher than that of the alloy, and its ability to resist deformation is increased.
In addition, the performance of the amalgam is also worth noting. Mercury is all gold and has a certain degree of resistance. However, the alloy is formed. Due to the interaction of atoms with each other, the performance of the alloy is reduced. Usually, the hardness decreases. Due to the increase of lattice defects in the alloy, the transfer of particles is blocked.
The physical properties of amalgam alloys are determined by the proportion of mercury. Under different proportions, their melting, density, hardness, and toughness exhibit different characteristics. These characteristics make them useful in many fields, such as ancient metallurgy and materials.
What is the price range of 4-bromobenzothiazole in the market?
In today's market, there are 4 kinds of fragrant rhinoceros, and the quality of the rhinoceros is uniform. The height of the rhinoceros is affected by various factors.
If you have a mixed rhinoceros, the quality of the rhinoceros is very important. The products of rhinoceros horn are of the upper, medium, and lower grades. The upper grades, the quality of the rhinoceros, the color of the rhinoceros, and the unique fragrance. The fragrance made by these mixed rhinoceros is very high, and it is often beyond the reach of ordinary people, or it is sold for thousands of gold or even higher grades. The middle ones, the quality, color, and fragrance are slightly different, but they also have a certain quality, and their quality may fluctuate up and down. The lower class, the quality is poor, the quality is relatively low, or it is not only ten gold.
The method of fragrance is also a great influence on the price. If the delicate method is used to skillfully integrate the precious spices like the rhinoceros, the fragrance is special and the flavor is long, and the price of such fragrances is not cheap. If the method of fragrance is crude and cannot be used to improve the quality of the rhinoceros, the price will also be high.
In addition, the supply and demand of the market also affect its price. If it is the same, the fragrance of the rhinoceros is sought after by the world, the demand is strong, and the supply is limited, and the price will rise. On the contrary, if the supply is limited, the price will fall.
As far as the market is concerned, 4 - the fragrance of the mixed rhinoceros, the low price is 10 gold, the high price is 1000 gold or even higher, depending on the quality, system and market supply and demand.
What are the storage conditions for 4-bromobenzothiazole?
In "Tiangong Kaiwu", tin and lead are cast together as money, and its storage conditions are quite exquisite.
Money is a common currency among the people. Tin and lead are cast together as money materials, and the first weight is moisture-proof. Because tin and lead are prone to rust when exposed to moisture, the body of the money is damaged, which affects its fineness and use. Therefore, the storage place needs to be in a high dry place, away from water, streams and other places where water vapor is easy to gather.
And it needs to be protected from high temperature. Under high temperature, the texture of tin and lead becomes soft, or the shape of money is out of shape. In addition, high temperature can easily cause chemical reactions between metals and change the properties of alloys. The storage place should be well ventilated to allow air circulation, take away the moisture and heat that may be generated, and keep the storage environment stable.
At the same time, anti-oxidation is also the key. Although tin and lead itself have certain antioxidant properties, it will still oxidize slowly when exposed to air for a long time. Therefore, it is advisable to properly seal the utensils, such as pottery urns, wooden boxes, etc., and place dry grass and wood ash and other moisture-absorbing objects in it to further create a dry and anaerobic environment.
In addition, the storage place needs to be protected from rats and insects. Rats have sharp teeth, which can damage the body of money; although insects and ants are small, long-term erosion may also cause damage to money and materials. Therefore, the place where money and materials are stored should be tidied up and left without debris, so that rats and insects have no place to hide. In order to properly store the tin and lead and cast the coins, ensure their quality and appearance, and prepare for the needs of minting coins.
