3,5-dimethylpyridine-4-carbaldehyde

In the ancient use of tools, where construction is involved, the function of B5, that is, the function of B5, is actually in construction and construction, and is the key consideration. This B5 has its specific functions in the construction of civil works, buildings and pavilions.
In terms of material modulation and structural construction of construction, B5 is often used for balance and calibration to ensure that the constructed things can be stable and durable. It plays an indispensable role in the proportion of materials and the determination of orientation.
As for the fourth, it also has its important implications in the category of construction. The four permanent is related to the position of the four parties. When selecting the site and layout of the construction, the four directions are used to make the created things conform to the order of heaven and earth and conform to the principle of yin and yang. For example, the construction of palaces and temples is based on the four rules of east, west, north and south, so that the planning of the building group is orderly.
Jia Geng is mainly used to distinguish yin and yang and determine good and bad luck. In ancient construction techniques, the distinction between good and bad luck and good luck is very important. Jia Geng can judge the timing and location of construction according to the five elements of life and gossip. For example, when breaking ground and erecting beams and columns, it is necessary to choose good times and auspicious places according to the good luck set by Jia Geng, so as to pray for the smooth construction and the safety and auspiciousness of those who live or use them in the future. In many large-scale construction projects, such as the construction of capitals and the construction of imperial tombs, Jia Geng's techniques are widely used to ensure the smooth and long-term well-being of the project.

To make acetonitrile, there are various methods. First, it can be obtained by dehydrating ammonia acetate. Take an appropriate amount of ammonia acetate, put it in a delicate vessel, and apply moderate heat to slowly dehydrate it. In the meantime, the nitrogen of ammonia is connected to the carbon of acetic acid, and the water is removed to form acetonitrile. This process requires precise temperature control, and the vessel must be clean and dry to avoid impurities.
Second, methanol and ammonia are used as materials, and acetonitrile can be formed by catalytic reaction. In a special reactor, a suitable catalyst is placed, and methanol and ammonia are added in an appropriate proportion to control the temperature and pressure. Methyl group of methanol and nitrogen of ammonia are combined under catalytic action to produce acetonitrile gradually. Among them, the choice of catalyst is the key, and its activity and selectivity are related to the quality and quantity of the product.
Third, methane cyanide can be hydrolyzed and then dehydrated to produce acetonitrile. First, methane cyanide and water are reacted under suitable conditions to obtain an intermediate containing carboxyl groups, and then dehydrated to obtain acetonitrile. However, methane cyanide is highly toxic, and caution must be taken during operation to prevent it from leaking and hurting people.
Fourth, acrylammonia oxidation can also produce acetonitrile. Acrylic, ammonia and oxygen are used as raw materials to react under the action of catalysts. This process is complex and involves many reaction steps, not only acetonitrile, but also other by-products. Therefore, it is necessary to fine-tune the reaction conditions and optimize the process to increase the yield of acetonitrile and reduce the generation of by-products.
All these methods have advantages and disadvantages. In practice, acetonitrile can be efficiently prepared only when carefully selected according to the availability of raw materials, cost considerations, equipment conditions and product requirements.

Mercury is a chemical substance with many physical properties. Under normal conditions, it is silver-white in color and has a metallic luster, shining brightly and eye-catching, as if the stars are sprinkling on the world. Looking at its shape, the texture is soft, just like the first wool of new cotton, and the hand can easily caress it to shape, but it does not lose its tenacity.
Furthermore, the density of mercury ethyl is quite considerable, heavier than ordinary things. Placed in the palm of your hand, you can feel its heavy texture, as if it contains endless power. Its melting point is also low, and if it is slightly heated, it will quietly turn into a liquid state, flowing between, and the brilliance flows. The boiling point is quite high, and it needs to be roasted by a hot fire before it can be vaporized into a curl of light smoke, which drifts between heaven and earth.
And ethyl mercury has good electrical conductivity, such as the fine spider silk, although slender, it can conduct current, so that the electricity can run unimpeded. In terms of heat conduction, it also shows extraordinary performance. The heat flow is like a smart fish, which can travel freely in it, and can transfer heat to various places in an instant.
And because of its relatively stable chemical properties, it is not easy to react violently with other substances in the general environment, just like a high-ranking man in the mountains and forests, who is alone and not easily disturbed by the outside world. However, under specific conditions, it can also show a lively state, blend with other things, and derive different changes.
This is the general physical property of ethyl mercury. Although it is invisible and colorless, it contains the secrets of nature. It is unique among all things in the world, waiting for the world to continue to explore to uncover more of its mysteries.

Arsenic trioxide is a toxic medicine. Its color is as white as snow, and its shape is like frost powder, which is very strong.
The chemical properties of arsenic are unique. First, it is reducible and can interact with many oxidants. In case of strong oxygen agent, arsenic can lose electrons and change valence, showing its oxidation. Second, it can form alloys with metals, change the properties of metals, and affect their physical and chemical properties. Third, it reacts with both acids and bases. In case of acid, corresponding arsenides and hydrogen can be formed; in case of alkali, arsenate and other products are formed. < Br >
Fourth, in aqueous solutions, arsenic trioxide can hydrolyze to form arsenic acid and other substances. This hydrolysis process is affected by many factors, such as temperature, pH and the like. Fifth, it has the ability to coordinate and form coordination compounds with certain metal ions. This property is of great significance in the fields of analytical chemistry and materials science.
Although arsenic trioxide is highly toxic, it is also useful in the fields of medicine and chemical industry. In medicine, it can be used to treat specific diseases, such as leukemia, after being finely processed and strictly controlled in dosage. In the chemical industry, it can be used as a raw material to prepare other arsenic-containing compounds. However, its toxicity is terrifying, and it must be used and stored with caution to prevent disasters.

The storage and transportation of ethyl mercury is related to people's livelihood, and it is also a safety hazard. It must not be ignored.
When storing, the first thing to weigh is its utensils. It must be stored in a firm and tight-fitting utensils to prevent leakage. Ethyl mercury is strong in nature. If it leaks outside, it will be a disaster. And the storage place should be a cool and dry place, away from open fires and hot topics. Because of the heat of ethyl mercury, it is easy to change, or it may cause danger.
In addition, the storage place must have clear awareness, with warnings such as "toxic", so that everyone knows that it is dangerous and far away. And when a special person is in charge, the number of entries and exits should be recorded in detail, and there should be no slight omission.
As for transportation, there are also many taboos. The transporter must choose a person who is skilled, who knows the nature of ethyl mercury, and knows the emergency method. The transportation vehicle should be stable and solid, shock-absorbing and anti-bumpy, so as to prevent it from being damaged due to vibration.
Always check on the way, observe the damage of the device, and check for any leakage. If there is an accident, take countermeasures quickly, not a little delay.
Furthermore, when transporting, you must follow the law, and you must not change the route and time without authorization. Mixing with other things, you must also be careful to prevent it from infringing with ethyl mercury and causing accidents.
In general, ethyl mercury should be cautious in storage and transportation, and must not be sloppy at all. A little carelessness can bring disaster to the common people, so those who are employed must do their best to ensure their safety and avoid their risks.