5 Iodo 2 Methylthiazole

Methylmercury is an organic compound of mercury. Its physical properties are particularly unique, and it shows a specific state in many aspects.
Looking at its form, under normal conditions, methylmercury is mostly in the form of a colorless and odorless liquid, and some of it appears in the world in the form of crystals. The density of this substance is greater than that of water. If it is placed in water, it will sink to the bottom of the water. Its boiling point is quite high, about hundreds of tens of degrees Celsius. To vaporize it, a considerable amount of heat needs to be applied.
Furthermore, methylmercury has a certain degree of volatility. Although its volatilization rate is not extremely fast, under certain environmental conditions, such as rising temperature and good ventilation, its molecules will gradually escape into the air. This property allows it to spread widely in the environment, resulting in more widespread pollution.
In terms of solubility, basic mercury is insoluble in water, but easily soluble in organic solvents such as ethanol and ether. This property makes it difficult to be easily diluted by water in the natural water environment. In environments rich in organic solvents, such as around chemical sites, its solubility makes it easier to diffuse and migrate.
The vapor pressure of basic mercury is relatively low, which means that under normal environmental conditions, its tendency to change from liquid to gas is not strong. However, once the ambient temperature, pressure and other conditions change, the vapor pressure will also change accordingly, which will affect its existence and propagation path in the environment.
These physical properties of methyl basic mercury make its behavior complex in the environment and pose a potential serious threat to the ecosystem and human health. Because it is not easy to degrade and can be enriched through the food chain, it needs to be highly valued to prevent its harm to the environment and life.

The chemical properties of methyl ether are quite specific. Methyl ether is an organic compound with a molecular formula of\ (C_ {2} H_ {6} O\) and a simple structural formula of\ (CH_ {3} OCH_ {3}\), also known as dimethyl ether.
It is flammable and can burn smoothly in the air, emitting a light blue flame, generating carbon dioxide and water. This reaction is violent and releases a lot of heat, such as "fire meets methyl ether, burning like a star, bright blue, and generating water and fire". This property makes it suitable for use as a fuel and has emerged in the field of energy.
The volatility of methyl ether is very strong, and it quickly turns into a gaseous state at room temperature and pressure. Because its boiling point is only\ (-24.9 ^ {\ circ} C\), it is "placed at room temperature, gasified in an instant, and floated away". This characteristic makes methyl ether widely used in aerosols and other products, and its rapid volatilization can achieve specific effects.
Methyl ether is slightly soluble in water, but it can be miscible with most organic solvents, such as ethanol, ether, etc. It seems to be "divided with water, and blends with other liquids." This solubility is of great significance in chemical production and scientific research, which facilitates its separation, purification and reaction.
Furthermore, the chemical stability of methyl ether is relatively good, and it is difficult to react with many substances under normal conditions. However, under specific catalysts and conditions, it can also participate in a variety of chemical reactions, such as hydrolysis, oxidation, etc., such as "in normal times, it is stable, and in special circumstances, it will be changed." This property is quite valuable in the field of organic synthesis and provides a way to prepare other compounds.

"Tiangong Kaiwu" states that wherever a mirror is cast, the mold is made of gray sand, the copper is made of tin, and the opening surface is made of light, it is made of mercury. And those who are alloyed with copper and tin are also bronze.
The use of bronze mirrors is first to take care of the face. The ancients used mirrors to cut their faces, which is related to etiquette. "The Book of Rites and Nei Ze" says: "The child is the parent, the chicken is at the beginning of the song, the salty swish, the comb is always there, the crown is full, the end is the gentleman, the wand. Wear it on the left and right, the sword, the sharpening, the small wand, the gold flintlock, and the right, the guard, the tube, the wand, the wood flintlock, the wand. The aunt of a woman Chickens chirp at the beginning of the day, salty gargle, comb, condor, and shrew. On the left, there are swords, sharpens, small beetles, and golden flintels. On the right, there are proverbs, pipes, threads, beetles, beetles, large beetles, wood flintels, beetles, and beetles. "It can be seen that combing the mirror after washing up in the morning is the beginning of observance.
Furthermore, bronze mirrors are used to ward off evil spirits and pray for blessings. The ancestors of ancient times believed in gods and ghosts, and used mirrors to ward off evil spirits. Mirror inscriptions often appear auspicious phrases such as" Long live a thousand autumn "and" Longevity Yizi ", praying for peace and prosperity, and many children and many blessings." Baopuzi · Inner Chapter "says:" Taoist priests desire longev It shows the importance of mirrors in warding off evil spirits in the hearts of the ancients.
In addition, bronze mirrors are a gift. When getting married, the mirror symbolizes harmony between husband and wife and grows old together. Friends parting ways, they give it with a mirror to express their thoughts and concerns. It carries deep friendship and is an emotional sustenance.
And because of the excellent production and exquisite decoration of bronze mirrors, it has high artistic value. The back of the mirror is decorated with various geometric patterns, animal patterns, character patterns, etc., and the craftsmanship is exquisite, reflecting the aesthetic and artistic standards of the time. It is an important object for future generations to study ancient art.

To prepare 5 -% acetylaniline, the synthesis method is as follows:
First take the amount of aniline, aniline is an important compound, and take the important raw material of acetylaniline. Aniline is placed in a reverse container, which needs to be dry and dry to prevent the reaction.
Another acetylated aniline is taken, which is often better than acetic anhydride. Acetylaniline aniline can be acetylated and reacted to produce acetylaniline. When acetylanhydride is added, it is necessary to add it slowly and mix it with the same degree. The purpose of slow dripping is to make the reaction energy smooth and avoid the reaction from being strong and out of control. Mixing can promote the reaction to be fully connected, accelerate the reaction rate, and make the reaction more complete.
In the reverse reaction process, it is necessary to control the reverse reaction degree. Generally speaking, the reverse reaction should be performed at the appropriate temperature, and the high or low temperature can affect the reverse reaction rate. It can be used to add water bath or oil bath, etc., to precisely control the reverse reaction degree, so that the reverse reaction can be performed at the lowest temperature.
After the reverse reaction is completed, in addition to the target acetylaniline in the reverse reaction mixture, there may still be raw materials and side substances that have not been reversed. In this case, it is necessary to separate the operation. The commonly used method is to re-crystallize. First, the mixed liquid is cooled to make the acetylaniline crystallize. And then, the method is used to solve the acetylaniline solution. The resulting solid and crude product is then recrystallized in an appropriate solution. The recrystallization operation can effectively increase the degree of acetylaniline until it reaches the required 5-% degree of crystallization.
The whole synthesis process requires a grid to control the amount of raw materials, the amount of raw materials, the reverse parts, and the operation of sub-extraction are all very important to successfully obtain 5-% acetylaniline.

Methylmercury is extremely toxic. When storing and transporting it, many matters must be paid attention to.
Bear the brunt. When storing, choose a suitable place. When placed in a cool, dry and well-ventilated place, avoid direct sunlight, covering sunlight can cause its chemical properties to change, increasing the risk of decomposition or volatilization. And it must be kept away from fire and heat sources, because it is flammable and explosive, in case of open flames and hot topics, it may cause disaster.
Second, storage containers are also exquisite. Corrosive and well-sealed materials, such as special glass or metal containers, must be used. Because methylmercury is highly corrosive, ordinary materials are easily eroded, causing danger of leakage. If the seal is not tight, it will easily evaporate in the air, pollute the environment, and endanger humans and animals.
As for transportation, it should not be ignored. Transportation personnel must be professionally trained and familiar with the characteristics of methyl mercury and emergency treatment methods. Transportation vehicles should be equipped with perfect fire and leakage emergency equipment. When driving on the way, be sure to drive slowly to avoid bumps and collisions to prevent damage to the container.
Furthermore, special personnel should be set up to supervise the transportation and storage process. Regular inspections to see if the container is damaged or leaking, and to check whether the temperature and humidity of the storage environment are suitable. If there is any abnormality, take measures quickly to contain the spread of hazards.
In addition, related operations should comply with strict regulations and standards. From the location and construction of the storage site to the planning and execution of the transportation process, nothing can be exceeded. In this way, it is necessary to ensure that methylmercury will not leak during storage and transportation, and reduce its harm to the environment and people.