3,7-DICHLOROQUINOLINE-8-CARBOXYLIC ACID

3% 2C7, that is, arsenic trioxide, also known as arsenic, highly toxic. In the chemical and technological knowledge system involved in "Tiangong Kaiwu", although it is a highly toxic substance, it also has specific uses.
Arsenic trioxide was mainly used in medicine in ancient times. Because doctors knew the principle of fighting poison with poison, after exquisite processing, arsenic trioxide can be used as medicine. According to ancient books, an appropriate amount of arsenic can treat certain sores, swelling, malaria and other diseases. Ancient physicians, after repeated practice and research, discovered the method of using arsenic as medicine to achieve the effect of curing diseases and saving people.
In the field of metallurgy, arsenic trioxide is also useful. In the ancient smelting process, the appropriate amount of arsenic was added to adjust the characteristics of metals, such as improving the hardness and toughness of metals. Although metallurgical technology at that time was not as developed as it is today, the ingenious use of arsenic trioxide also reflects the ancient understanding and control of material properties.
Furthermore, in the ancient dye production process, arsenic trioxide may be involved. The preparation of dyes of certain special colors, or the chemical properties of arsenic, can achieve the desired color and stability. However, this application may require extreme caution to prevent severe toxicity from endangering the lives of artisans.
8, that is, chlorine, its compound chloric acid, although not as widely recognized and used as in modern times, there are traces to follow. Chloric acid is highly oxidizing and may have potential uses in ancient military fields. For example, it may be used to make gunpowder for some special firearms to enhance their explosive power and combustion effect. Because chloric acid is easily decomposed by heat or impact to produce oxygen, which can support combustion and enhance explosive power, it may be tried by the ancients in the improvement of firearm manufacturing formulas.
In summary, arsenic trioxide and chloric acid had their own uses in ancient times, or involved in medicine, metallurgy, dyes, military and other fields. Although the application method is different from that of modern times, it also shows the wisdom and exploration spirit of the ancients.

Nitrous oxide is a substance with special physical properties. Under normal conditions, it is blue in the shape of a gas and has a pungent smell. The melting point of this substance is quite low, about -102 ° C, and the boiling point is not high, around 3.5 ° C. Because of its low melting boiling point, it is very volatile into a gas at room temperature.
Looking at its color, it is blue. This unique color is unique among many gases and is easy to identify. Furthermore, its pungent smell can make people smell it.
Under specific conditions, nitrous oxide has poor stability and is prone to decomposition reactions. This decomposition property is related to its internal chemical bond structure. In its molecular structure, the energy distribution of chemical bonds makes it vulnerable to damage when external conditions change, such as heating, encountering specific catalysts, etc., resulting in decomposition.
In addition, dinitrous oxide can have a certain solubility in water. When it dissolves in water, it will chemically react with water to form corresponding compounds. This process of dissolution and reaction is closely related to the chemical properties of water and the chemical activity of dinitrous oxide itself. Its solubility in water plays an important role in many chemical processes and practical applications.
From the above, it can be seen that the physical properties of nitrous oxide, such as color, odor, melting point, as well as its stability and solubility, are interrelated and together constitute its unique system of physical properties. It is of great significance in the research and application of chemistry.

3% 2C7, carbon dioxide is also. Its properties are peaceful, and it is a colorless and odorless gas at room temperature and pressure. It is heavier than air and can be dissolved in water to form carbonic acid.
Carbon dioxide is non-flammable and does not support combustion. It is often used for fire suppression. It is most important for photosynthesis. Green plants depend on oxygen and sugar production to maintain the cycle of life.
8, ozone is also. Ozone is active, has strong oxidizing properties, and has a strong taste. It is in the ozone layer of the atmosphere, which can cover the ultraviolet rays of the sun and protect life on the surface. However, the high concentration of ozone near the ground is a pollutant, which is harmful to the human body and the environment.
Carboxylic acids are organic compounds containing carboxyl groups. Acidic, capable of forming salts with alkalis and esterification with alcohols. Common ones such as acetic acid, an essential component of vinegar, have a sour aroma, and are also used in the chemical industry.
Carbon dioxide is stable and used for fire extinguishing and preservation; ozone has strong oxidizing power, protects the world at high altitudes, and causes harm near the ground; carboxylic acid is acidic, involving chemical production and daily food. All things have their own characteristics, which have a great impact on human life and the state of nature.

There are many wonderful ways to synthesize boron trioxide, carbon dioxide, and sodium octaborate.
First, boric acid and borax can be used as raw materials. Place boric acid and borax in a special container in an appropriate proportion. First, slow down the heat to make the two gradually blend, during which time it must be stirred with exquisite equipment to make it mix evenly. Then, gradually raise the heat to a suitable temperature, maintain this state, and after a certain period of time, you can get boron trioxide, carbon dioxide, and sodium octaborate. In this process, the control of temperature and time is the key, and if there is a slight difference, the product will be impure.
Second, the boron-magnesium ore is the starting material. The boron-magnesium ore is finely ground into a fine powder. Then it is placed in a furnace with an appropriate amount of soda ash and calcined at high temperature. This high temperature needs to be precisely controlled, so that the boron-magnesium ore and soda ash can fully react. The resulting mixture can be separated from diboron trioxide, carbon dioxide and sodium octaborate after subsequent treatment, such as dissolution, filtration, crystallization, etc. This way of raw materials is easy to obtain, but the process is slightly complicated, and each step needs to be done with caution.
Third, the method of chemical vapor deposition is used. Select suitable source boron, carbon source and sodium source gases and introduce them into a specific reaction chamber. Under specific temperature, pressure and gas flow conditions, the gases chemically react in the chamber and deposit on the surface of the substrate to form a thin film or coating containing diboron trioxide, carbon dioxide and sodium octaborate. This method can precisely control the morphology and structure of the product, but the equipment requirements are high and the cost is not cheap.
All this synthesis method has its own advantages and disadvantages. It is necessary to weigh the raw materials, costs, equipment and other factors according to actual needs, and choose carefully to obtain the ideal synthesis effect.

There are three things to ask today, which is the price of arsenic trioxide, carbon dioxide, star anise and citric acid in the market. I will explain it for you in detail.
First of all, arsenic trioxide is a highly toxic substance, an unusual commodity in the market. Because of its fierce toxicity, it is related to life, and it is strictly controlled by law, and it is strictly prohibited to buy and sell it privately. It is difficult for ordinary people to obtain, and there is no market price.
As for carbon dioxide, this substance is widely used in industry. The price of industrial-grade carbon dioxide often varies depending on the method of preparation, purity, dosage and region. Generally speaking, when purchasing in bulk, the price per kilogram may be between a few yuan and a dozen yuan. If used for food-grade carbon dioxide, due to the extremely high purity requirements, the price is also slightly higher, about 20 yuan per kilogram.
Besides star anise, star anise is a commonly used spice, and its price fluctuations are affected by the season, origin and quality. When the harvest is good, the price may drop slightly; when the harvest is poor, the price will rise. For ordinary quality star anise, the price per catty is about 20 to 30 yuan; if it is high-quality star anise, the price per catty can reach 40 yuan or even higher.
Finally, on citric acid, citric acid has many uses and is used in food, beverage, medicine and other industries. Industrial grade citric acid, the price per ton is about thousands of yuan; food grade citric acid, due to higher quality requirements, the price per ton may reach about 10,000 yuan.
The prices of the above items are all approximate numbers, and the market conditions are ever-changing. The actual price shall be subject to real-time.