1-benzothiophene-2-carbonyl chloride

The main course of this branch of croton is covered by two things. First, it is used as medicine to treat diseases, and its effect is very effective. Croton is hot in nature, has a refreshing taste, and has great poison. However, it has the ability to cold-accumulate, reduce swelling by water, remove phlegm and improve pharynx, and erode sores. In the past, physicians used croton with rhubarb and dried ginger as a prescription, and it was named Sanwu to prepare urgent pills to save sudden heart and abdominal distension and pain, pain like cones and thorns, and acute breath and mouth. Every time it can heal. Its use, or pill powder, must be cautious, with its toxicity and violence, a little more will not be a disaster.
Second, it has wonderful uses in agriculture. The oil meal of croton, although poisonous, can be made into pesticides to repel insects and kill filth, and ensure the safety of crops. And croton plants have the property of repelling insects and avoiding filth. Planted on the edge of pastoral gardens, they can control pests and ensure the safety of fruits, vegetables and grains. This is all the help of croton in farming mulberry.
From this perspective, although croton is poisonous, it can be used properly. It is a weapon for medicine and agriculture. Doctors use it to treat diseases, when they understand their nature, examine their evidence, and use it accurately; farmers use it to protect their fields, they must also make good use of it according to scientific methods. In this way, the benefits of croton can be obtained, but the harm can be avoided.

The combination of nitrate and alum is all used in ancient alchemy and pharmaceuticals, and is also involved in many alchemy techniques.
As for the synthesis of chlorine today, there are ancient methods to follow, and there are also new techniques created today. Among the ancient methods, or by the principle of the combination of yin and yang, and the five elements, based on natural things, through complex processing, or it can be achieved.
One method is to use various minerals to be calcined by fire to make the essence of it precipitate, such as in the pill furnace, to control the temperature, observe its color and metamorphosis, and wait for its chemical synthesis to be exquisite, or to obtain the prototype of chlorine. The second method is to take the genus of plants and trees, match them with minerals, and borrow the vitality of plants and trees to combine the properties of minerals. In a special vessel, it is soaked, tortured, and distilled in order to achieve the purpose of synthesis.
Today's method, due to the prosperity of science and technology, has exquisite means. Or by the principle of chemical synthesis, with accurate measurement and pure raw materials, in a closed vessel, control temperature and pressure, so that molecules can be combined in a predetermined manner. For example, by using the method of organic chemistry, select suitable reactants, and add high-efficiency catalysts to make the reaction proceed in sequence, resulting in high-purity chloroalkane. < Br >
There are also those who use physical methods to assist, by centrifugation, extraction and other techniques, to purify and refine the synthesized product. Or use high-tech instruments to monitor the whole process of the reaction, so that the synthesis process is accurate, and the quality of the chloroalkane obtained is better than that of the ancient method.

Lead and mercury are common things. Lead is heavy and soft, with a silver-white and shiny color. Its melting point is low, only about 300 degrees, and its boiling point is quite high, reaching more than 700 degrees. Lead has poor ductility and limited ductility, but its chemical properties are stable, and it is not easy to oxidize quickly in the air, so it can be stored for a long time. Mercury is liquid at room temperature, commonly known as mercury. Its color is silver-white and shiny, and it flows freely. It is the only liquid metal. Its density is very high, and it is volatile. The vapor is highly toxic and must not be accidentally touched. The freezing point of mercury is extremely low, about minus 39 degrees, and the boiling point is not high, only 357 degrees.
Both lead and mercury have many characteristics. Lead has good corrosion resistance, so it is often used in the manufacture of chemical pipelines, reaction kettles, etc., to prevent strong acid and alkali erosion. And lead can absorb rays. In the fields of medical treatment and nuclear energy, lead plates and lead clothing are often used to protect the human body from radiation damage. Mercury has good electrical conductivity and is widely used in electrical instruments. For example, the common mercury thermometer uses the thermal expansion and contraction characteristics of mercury to measure temperature. And because of its high surface tension, it is bead-like when sprinkled, and is not easy to adhere to other objects.
However, lead and mercury are also harmful. Lead enters the human body and accumulates in bones, liver, kidneys and other organs, causing lead poisoning, causing anemia, nerve damage, digestive system disorders and other diseases, especially on children's intellectual development. The harm of mercury should not be underestimated. Its vapor inhaled into the human body can damage the nervous system, kidneys, etc., causing insomnia, memory loss, tremors and other symptoms, and life-threatening in severe cases. Therefore, although lead and mercury are available, it is necessary to use caution when using them to prevent their harm before it occurs, to ensure people's health and environmental cleanliness.

Mercury is a highly toxic substance, and it is a taboo alongside lead. Mercury gas evaporates, inhales easily damaged internal organs, and erodes people's spirits. It must not be ignored.
Today, when storing and transporting mercury, many matters must be taken with caution. First, the storage place must be dry and cool, protected from heat and light. Because mercury is heated, it will boil, and the gas will overflow and disperse, hurting people invisibly. And it must be tightly sealed to prevent leakage. If mercury leaks into the ground, it will be quickly covered with sulfur. Mercury and sulfur will be synthesized into mercury sulfide, and the toxicity will be greatly reduced.
Second, when transporting, the packaging must be solid. Choose a special container, which can resist pressure, drop, and seal well. During transportation, avoid vibration and bumps, and avoid hot topics. Escorts should be familiar with the characteristics of mercury and know emergency methods. If there is an accident, quickly make a plan to ensure the safety of people and animals around you, and avoid the disaster of mercury poisoning.
Furthermore, those who participate in the storage and transportation of mercury must be protected. Wear special protective clothing, air-tight masks and gloves to prevent mercury gas from entering the body and mercury liquid from touching the skin. Regular physical examination to check the body for signs of mercury damage, early detection and early treatment.
The storage and transportation of mercury is related to human life and the environment. Everything must be meticulously planned to be comprehensive. It must not be caused by temporary negligence, which will cause mercury poison to wreak havoc and cause major disasters.

In today's world, silicon and gallium are widely used in various industries, and it is particularly critical in the field of electronics. As for today's market, the price of silicon and gallium varies from time to time due to market conditions.
Silicon is the cornerstone of the semiconductor industry and has a wide range of uses. Common silicon wafers vary in price according to size and purity. Generally speaking, the price of an ordinary pure silicon wafer with a diameter of eight inches may range from tens to hundreds of yuan per piece; if it is twelve inches and high purity, the price of each piece can reach hundreds of yuan. Because of its complex manufacturing process and the demanding environment and equipment, the price is not the same.
Gallium is also an important sparse metal, indispensable in optoelectronics, microwave devices and other industries. The market price of gallium often changes due to the abundance of minerals and the rise and fall of demand. In recent years, the price of gallium per kilogram of metal has been around hundreds to thousands of yuan. In the case of special-purpose, high-purity gallium, the price is even higher.
However, it is necessary to understand that the supply and demand of the city, the orientation of the government, and the geographical conditions are all the main factors that affect the price of silicon and gallium. Therefore, if you want to know the real-time price, you must check the dynamics of the city and consult various industry players to obtain a certain number. The market conditions are ever-changing, and the price is also impermanent. Industry players and planners should take advantage of the situation to respond to the changes in the market.