5-Bromopyridine-3-sulphonyl Chloride

5% of the total amount of water, there are three main uses. First, it can be used for cooking. Ancient people often used this material to treat general diseases. If there is oil in the stomach, or the stomach is not weak, the amount of water used can be used to improve the passage, so that the water can be drained, and the disease of the abdomen can be caused. Because of its effectiveness, it can transform the stomach, so that the water can go down, and it can be obtained.
Second, it can be used to help with labor. In some handicrafts, such as ceramics and metal smelting, water can be used for wonders. Before the ceramic billet is formed, it can be rubbed or mixed into the raw material with a proportion of 10% water, which can improve the performance of the billet, make it easier to form in the manufacturing process, and the finished product is denser and brighter. Metallurgical smelting, adding a small amount of water can help remove the water, improve the gold, and make the gold produced by the smelting more efficient.
Third, it can also be used in sacrificial prayers. The ancients believed that the gods of heaven and earth, and every major day or event, they often performed sacrificial ceremonies. Because of the name "water", it has a spiritual effect. In the process of sacrifice, the water is used around the sacrifice, or before the gods. People hope that this can feel the gods, obtain the blessing of the gods, relieve the suffering, and pray for the rain in the year, the five-year harvest, and the safety of people and animals.
Of the total, 3% of the 5% water is used in ancient times, work and sacrifice, etc., which play an important role. Its use is extensive and has a deep impact on the life of the community.

To make boron trichloride, there are three methods.
First, boron and chlorine are co-heated. Boron is a hard and chemically active non-metal. The chemical equation for the reaction of boron powder and chlorine in a high temperature environment is: $2B + 3Cl_ {2}\ stackrel {\ Delta }{=\!=\!=} 2BCl_ {3} $. During operation, the boron powder is placed in a special reaction vessel, filled with chlorine gas, and then heated with a high temperature heat source. This reaction is violent and will release a lot of heat. Careful temperature control and chlorine penetration rate need to be adjusted to ensure the smooth progress of the reaction. However, this method requires high reaction equipment and needs to be able to withstand the strong corrosiveness of chlorine gas.
Second, boron oxide is co-heated with carbon and chlorine. Boron oxide is a stable oxide of boron, and it can be prepared by co-heating with carbon and chlorine. The reaction equation is: $B_ {2} O_ {3} + 3C + 3Cl_ {2}\ stackrel {\ Delta }{=\!=\!=} 2BCl_ {3} + 3CO $. First, mix boron oxide and carbon powder in a certain proportion, place it in a high temperature reactor, add chlorine gas and heat it. In this reaction, carbon acts as a reducing agent to reduce boron oxide and react with chlorine to form triboron chloride. The raw materials of this method are relatively easy to obtain, but the reaction will produce toxic carbon monoxide gas, and a perfect exhaust gas treatment device is required to prevent pollution of the environment and harm to human health.
Third, it is prepared by halide replacement reaction. For example, by reacting boron trifluoride with aluminum chloride, boron trichloride can be obtained. The chemical equation is: $BF_ {3} + AlCl_ {3 }=\!=\!= BCl_ {3} + AlF_ {3} $. This reaction is carried out in a specific organic solvent, using the principle of replacement between different halides. Boron trifluoride and aluminum chloride are ion exchanged in solution to form boron trichloride. The reaction conditions of this method are relatively mild and the equipment requirements are slightly lower. However, it is necessary to pay attention to the selection of suitable organic solvents, and the separation and purification of the products after the reaction also require fine operation to obtain high-purity boron trichloride.

Mercury is a highly toxic substance. It is a liquid metal with many unique physical properties.
Mercury is silvery white in color and dazzling in brightness. Under normal temperature and pressure, it is a flowing liquid state, which is different from most metal solids. Its fluidity is excellent, like agile water silver beads, which are easily dispersed and can be rapidly polymerized.
Mercury has a high density, about 13.6 times that of water. Due to its high density, it will sink rapidly in water. And the surface tension of mercury is so great that it often aggregates into round droplets on a flat surface, like silver beads.
The melting point of mercury is very low, only -38.87 ° C, which allows mercury to remain liquid in ordinary low temperature environments. And its boiling point is relatively high, reaching 356.6 ° C. Mercury has good thermal and electrical conductivity and is used in many electrical components.
It is necessary to be vigilant that mercury is highly volatile and will continue to evaporate mercury vapor in room temperature environments. This mercury vapor is extremely toxic. Once inhaled by the human body, it will cause serious damage to the nervous system, kidneys, etc. Even if mercury spills on the ground, due to its liquid fluidity, it is easy to seep into the corners and continue to evaporate, endangering the environment and human health. And mercury can form alloys with a variety of metals, called amalgams. This property has applications in metallurgy and other fields, but due to the toxicity of mercury, it needs to be used with extreme caution. Although the ancients had limited knowledge of the properties of mercury, they were also aware of its uniqueness and dangers, so they should be very careful when using it.

The method of hiding ice has been known in ancient times. All things about hiding ice and transporting ice need to be cautious.
When hiding ice, the first source of ice is heavy. Ice should be taken from a clean place, such as a clear spring in a deep mountain, or a vast flat lake. The water is pure and unstained, and the ice is solid and crystal clear. The place where the water is drawn should not be close to filth or evil, so as to prevent the ice from being unclean and causing the hidden ice to rot.
The place where the ice is hidden must be carefully constructed. The ice cellar should be built in a cold place, with a high and dry terrain to avoid water and moisture. The cellar wall should be thick and tight to prevent the intrusion of hot air. The bottom of the cellar can be covered with thick grass or felt wool to prevent the earth gas from rising. When storing ice, the ice cubes should be stacked layer by layer, with a slight gap in the middle to allow the cold air to circulate, which is conducive to the preservation of the ice.
When transporting ice, there is also a lot of attention. When transporting, the action should be gentle, and the ice cubes should not be collided and broken. The transportation tool should be well insulated, and the ice cubes can be wrapped in felt cloth, quilts, etc., to slow down their melting. And the road of transporting ice should be convenient and smooth, so as to avoid delays and ice loss.
The ice is hidden and lost, and it needs to be guarded by special personnel. Check the temperature and humidity of the ice cellar and adjust it in a timely manner. If the ice cubes are found to have melted or damaged, they need to be disposed of immediately. In this way, it is possible to minimize the loss of ice during storage and transportation, so that when it is needed, the ice quality is intact and the effectiveness is as good as ever.

In today's market, the price of the five-glass hillhouse varies from time to time and place, and it is difficult to generalize.
The method of making glass, whether fine or coarse, the materials used, whether good or bad, all depend on the price. And the use of glass is wide, whether it is for decoration or for utensils, the functions are different, and the price is also poor.
If the five-glass hillhouse of high quality and pure color and exquisite craftsmanship is sold in the bustling city, it may be sold at a high price. In the city of Gaidu, the rich and rich gather together, and they are good at rare things, and they will not hesitate to buy them for enjoyment and display. The price of such five-glass hillhouses ranges from a few gold to even dozens of gold.
However, in remote places or ordinary places in the market, the five glass hillhouses sold are mostly crude, used for daily use. Its price is cheap, or it can be obtained with only a few dollars.
As for the three blue halogen, there is also a situation. The production of blue halogen is related to the source of ore, and its difficulty in mining and smelting also affects the price of the market. If the source of ore is abundant and the mining and smelting are convenient, the price is slightly flat; if the source of ore is scarce and the mining and smelting are difficult, the price is high.
In the city, the third pure is blue halogen, which is heavy for workers. It is often the best choice for the coloring of the system, and the price is always higher than that of regular products. The price may be high or low due to the quality, from counting money to counting gold. However, the crude blue halogen is only a mundane material, and the price is meager, only a few words.
In general, the market prices of Wuli Hillhouse and Sancheng blue halogen vary according to quality, use, time, and place, and cannot be limited.