3-chloropyridine

The main use of 3-aminopropyl is reported in "Tiangong Kaiwu". Although there was no such precise chemical term at that time, it can be understood a little bit by referring to related processes.
Its uses may involve many fields. In the art of tanning, it may be used to improve the properties of leather. When leather is tanned, certain nitrogen-containing substances can interact with leather fibers to enhance the toughness and durability of leather. The activity of amino groups in aminopropyl may participate in such reactions, making leather more tough and non-perishable, making leather products durable, and can be used in footwear, clothing, etc., to meet the daily and daily needs of the people.
Furthermore, in the papermaking industry, aminopropyl may affect the performance of paper. Paper is made of interwoven fibres, and aminopropyl may be able to combine with fibres to change the force between fibres. For example, it can enhance the wet strength of the paper, making the paper not easy to be soft and rotten in contact with water. For papers that need to be waterproof or used in humid environments, such as oil paper or some special-purpose papers, this property is crucial and helps to improve the application range and quality of the paper.
In the treatment of fabrics, aminopropyl may also have its uses. When the fabric is dyed, the presence of aminopropyl may improve the bonding force between the dye and the fabric fibers. The amino group can chemically react with certain dye molecules, making the dye adhere more firmly to the fabric, thereby improving the fastness of dyeing, making the fabric color lasting and bright, not easy to fade, and meeting the public's demand for the beauty and durability of the fabric.
In addition, in the preparation of adhesives, aminopropyl may be used as a key component. The adhesive needs to have good adhesion and cohesion. The active group of aminopropyl can interact with the surface of the material to be bonded to form a strong bonding force, so that the adhesive can firmly bond different materials together. It is widely used in woodworking, construction and many other industries to help the production and construction of various objects.

3- Those who are rational to their objects have similar characteristics. Its density is small, and under normal conditions, the color, odor, and taste are different. This is the physical property of the author.
The melting temperature is low, -259.14 ° C, and the boiling temperature is also very low, -252.87 ° C. Such a low melting temperature makes it exist in most normal environments. And its solubility is special. It is soluble in water, but it can be dissolved in some gold. This property is very important in the study of the interaction of gold materials.
Furthermore, the melting property is very good, and its rate ranks among the best in all fields. This property makes it useful in multi-project application scenarios such as transportation. For example, in some high-efficiency scattering systems, its good performance may be exploited.
In addition, its scattering property is fast, and its molecular speed and scattering ability are low. This property makes it possible to quickly disperse in the air if there is leakage. However, it is also because of this that it is necessary to prevent leakage in the process involving the storage and recovery of materials. Because of its rapid dissipation, once it is lost, it may easily lead to similar safety problems. In addition, the physical rationality of 3-dimensional materials is multi-dimensional, and its general characteristics need to be considered before it can be properly used in different domains.

3-Bromopropane is an organic compound. It is a colorless and transparent liquid with a special odor, slightly soluble in water, and miscible in most organic solvents such as ethanol, ether, and chloroform. Its chemical properties are mainly at the following ends:
1. ** Substitution reaction **:
- ** Hydrolysis reaction **: In the environment of sodium hydroxide aqueous solution, 3-bromopropane can undergo hydrolysis reaction, and the bromine atom is replaced by a hydroxyl group to generate 3-propanol. The reaction formula is: $CH_3CH_2CH_2Br + NaOH\ xrightarrow [] {H_2O} CH_3CH_2CH_2OH + NaBr $. The reason for this reaction is that the hydroxyl nucleophilic attacks the carbon atom attached to the bromine atom, and the bromine ion leaves to form an alcohol product.
- ** Cyanolysis reaction **: Co-heating with the alcohol solution of sodium cyanide, the bromine atom of 3-bromopropane will be replaced by the cyanyl group to form 4-cyanopropane. The reaction formula is: $CH_3CH_2CH_2Br + NaCN\ xrightarrow [] {alcohol} CH_3CH_2CH_2CN + NaBr $. The obtained product is hydrolyzed to produce carboxylic acids, which are often used in organic synthesis to grow carbon chains.
2. ** Elimination reaction **: Under the condition of sodium hydroxide alcohol solution and heating, 3-bromopropane can undergo elimination reaction to remove hydrogen bromide molecules to form propylene. The reaction formula is: $CH_3CH_2CH_2Br + NaOH\ xrightarrow [] {alcohol,\ triangle} CH_3CH = CH_2 + NaBr + H_2O $. The process of this reaction is that the bromine atom and the hydrogen atom on the adjacent carbon atom are removed in the form of hydrogen bromide under the action of alkali, and the carbon-carbon double bond is formed between the adjacent carbon atoms.
3. ** Reaction with metal **: 3-bromopropane can react with the metal magnesium in an anhydrous ether environment to form Grignard reagents. The reaction formula is: $CH_3CH_2CH_2Br + Mg\ xrightarrow [] {anhydrous ether} CH_3CH_2CH_2MgBr $. Grignard reagent is an extremely important reagent in organic synthesis. It can react with many reagents such as carbonyl compounds to form carbon-carbon bonds and synthesize various types of organic compounds.

The method of making sea boats has existed in ancient times. In the past, the construction of boats and boats was related to national strength, war and people's livelihood, and its method also changed with the times.
According to "Kaogong Ji", the ancient boats were made of wood, which was carefully cut by craftsmen, and the mortise and tenon were connected, which was strong and practical. Where a sea boat is built, choose good wood first, and its wood whiskers are tough and water-resistant, such as camphor and nan. When cutting wood, you must choose the time and place to ensure the quality of the wood.
Then, plan the shape of the boat. The shape of a boat should be conducive to breaking waves and moving forward. The bow is pointed, like a sharp blade to divide water, which can reduce the resistance of water; the hull is wide to increase its stability, so that it can sail safely in rough seas. The size of the ship depends on the use. If it is for commercial travel, it must be large to accommodate more things; if it is a warship, it should take into account flexibility and combat power.
As for the structure of the boat, the bottom is paved with thick wood, waterproof leakage; the side of the ship is towering, which can withstand the impact of waves. Cabins have their own uses, cargo storage, passenger cabin carrying people, rudder at the stern, control the course, and anchor at the bow for berthing. And in order to prevent the hull from decaying, tung oil, lime and other materials are often smeared to prevent moisture.
There is also a sail mast, which is made of solid wood as a pole, standing high on the hull of the ship, and hanging sails on it. The sail is made of cloth, depending on the direction of the wind, adjusting the angle of the sail, and using the power of the wind, travel on the sea. When the wind is in good condition, the canopy is full of sails, and the boat is like flying; when the wind is against, it turns ingeniously and moves forward in a detour.
In addition, the work of shipbuilding requires skilled skills. The craftsmen have been passed down from generation to generation, each has its own strengths, and the division of labor is fine. They can chop wood, or make sails, or use nails and riveting. Everyone is united, and the boat can be made. Although the method of making a sea boat has gone through thousands of years, the principle is the same, and it is the foundation of navigation in future generations.

The quality of 3-deuterated benzene in today's market is affected by many factors. If it is not the same, it is often affected by the quality, the supply and demand, and the ease of extraction.
As for the general refined 3-deuterated benzene, its quality is similar to that of high-quality, and the cost per gram may be between 100 and more than 1,000 yuan. This is because the technical development of deuterated compounds requires exquisite methods, so the cost remains high and the cost is also relatively high.
However, if its quality is slightly lower, or used in general and non-high-end research scenarios, the cost may decrease. This price per gram may be reduced to 100 yuan or even 10 yuan, depending on the supply and demand of the market.
It also affects the supply and demand of the market, and also affects the depth of the grid. If there is a large increase in demand, but the supply is limited, the price will increase; on the contrary, if the supply is abundant and the demand is low, the price may decline.
Therefore, to know the price of 3-deuterated benzene in the market, it is necessary to consider all kinds of factors, and it is covered in one sentence.