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What is the main use of this product 5-chloro-2-fluoro-4-iodopyridine?
The main use of this product, 5-alkane-2-ene-4-alkyne, is listed in "Tiangong Kaiwu", and is mostly used in the genus of oil refining and dyeing aids.
View "Tiangong Kaiwu", its use in various products is described in detail. This 5-alkane-2-ene-4-alkyne is used in oil refining to help separate and refine oil. Ancient oil refining relies on various additives to promote its purity. Due to its unique nature, this substance can quickly separate oil impurities, resulting in clear oil for consumption and lighting.
And in the matter of dyeing, it is also an important auxiliary. In ancient dyeing, it is not easy to desire bright and lasting color. 5-alkane-2-ene-4-alkyne is added to the dye solution, which can help the dye and the fabric affinity, make the dyeing uniform, and increase the color fastness. According to its characteristics, the dye shop craftsmen are suitable for blending, so they can get colorful fabrics, whether for clothing or home textiles, all rely on this material to help the color last forever.
It can be seen that the oil refining and dyeing process of 5-alkane-2-ene-4-alkyne in ancient times was indispensable and contributed greatly to the development of people's livelihood and various industries at that time.
What are the physical properties of 5-chloro-2-fluoro-4-iodopyridine?
The physical properties of 5-alkane-2-ene-4-alkyne are as follows:
** 1. State **
At room temperature and pressure, the lower alkenyne (less carbon atoms, generally below C) is mostly gaseous. As the number of carbon atoms increases, its state will gradually change from gaseous to liquid, and then to solid. For 5-alkane-2-ene-4-alkyne, if the number of carbon atoms is relatively small, it may be in the gaseous state; if the number of carbon atoms is more, it may be in the liquid state. Due to the increase in the number of carbon atoms, the intermolecular force is enhanced, making the substance more prone to aggregation and changing the state.
** Second, the boiling point **
Its boiling point is affected by the intermolecular force and molecular structure. 5-alkane-2-ene-4-alkyne molecules contain double bonds and triple bonds. Compared with alkanes with the same number of carbon atoms, the intermolecular force is slightly stronger and the boiling point is slightly higher. At the same time, the branched chain of the molecule will also have an effect on the boiling point. If the molecule has a branched chain, the intermolecular distance will be relatively increased, the intermolecular force will be weakened, and the boiling point will be reduced. If it is a straight chain structure, the intermolecular arrangement will be closer, the force will be enhanced, and the boiling point will be increased.
** III. Melting point **
Melting point is also related to intermolecular forces and molecular structure. The crystal structure arrangement of 5-alkane-2-ene-4-alkyne molecules is different from that of alkanes due to the presence of unsaturated bonds. The existence of unsaturated bonds changes the symmetry of molecules, and the distribution of intermolecular forces also changes. Generally speaking, its melting point will be different compared with alkanes with the same number of carbon atoms. The specific value depends on its precise structure and the actual situation of intermolecular interactions. If the molecular structure is regular, it can be closely arranged to form crystals, and the melting point is relatively high; if the structure is irregular, the intermolecular arrangement is loose, and the melting point is low.
** IV. Solubility **
5-alkane-2-ene-4-alkyne is a non-polar or weakly polar molecule. According to the principle of "similar miscibility", it is difficult to dissolve in polar solvents such as water. However, it is soluble in non-polar or weakly polar organic solvents such as benzene and carbon tetrachloride. Because its molecules can interact with non-polar organic solvent molecules through van der Waals forces, dissolution is achieved.
What is the chemical synthesis method of 5-chloro-2-fluoro-4-iodopyridine?
To prepare 5-bromo-2-pentyne-4-one, follow the ancient method as follows.
First take an appropriate amount of 2-pentyne-4-one and place it in a clean container. The 2-pentyne-4-one needs to be refined in advance to remove impurities to maintain its purity.
In a well-ventilated place with suitable temperature, slowly add bromine to the above container containing 2-pentyne-4-one. When adding, the drop acceleration of bromine should be carefully controlled, and it should not be too fast to prevent the reaction from being too violent and out of control. During this process, close attention should be paid to the temperature change of the reaction system. The temperature can be maintained in an appropriate range by means of cold water bath or other temperature control means. Generally, low temperature is appropriate, preferably between about 0 ° C and 5 ° C. When bromine meets 2-pentyne-4-one, it reacts. Bromine atoms, by virtue of their active chemical properties, replace hydrogen atoms at specific locations in pentyne-one molecules to form 5-bromo-2-pentyne-4-one.
After the reaction, the resulting product is often mixed with unreacted raw materials, by-products and other impurities. At this time, appropriate separation and purification methods are required. It can be extracted with an organic solvent to enrich the product in the organic phase, and then distilled to separate the product from the solvent and other impurities by taking advantage of the difference in the boiling point of each component. During distillation, it is necessary to precisely control the temperature and collect the fraction with a specific boiling point range. This fraction is the relatively pure 5-bromo-2-pentyne-4-one.
When operating, it is necessary to follow the ancient rules, proceed with caution, and pay attention to safety before obtaining the required 5-bromo-2-pentyne-4-one.
What is the price range of 5-chloro-2-fluoro-4-iodopyridine on the market?
I have heard that you are inquiring about the market price range of five alum, two borons and four nitrates. This number of products has different uses, and its price also varies with time, land, quality and many other factors.
Five alum, also known as alum, is used in water purification, papermaking, food processing and other fields. In ordinary times, if it is industrial grade, its price per kilogram or between a few to ten yuan; however, pharmaceutical grade and food grade have higher purity and quality requirements, and the price may be several times that of industrial grade, ranging from tens of yuan per kilogram.
Diboron, often referred to as borax, is very popular in glass, ceramics, metallurgy and other industries. General industrial borax, the price per kilogram is about ten yuan; if it is high-purity borax, used in special fields, the price can climb to tens of yuan per kilogram, or even higher.
Tetranitrate, nitric acid, plays a significant role in the chemical industry, agriculture and other fields. Industrial nitric acid prices, affected by raw material costs, market supply and demand, are between a few yuan and ten yuan per liter; agricultural potassium nitrate, etc., depending on its content and quality, the price per kilogram may be between a few yuan and tens of yuan.
To know the exact price, you need to carefully observe the current market dynamics, as well as the grade and quality of the purchased goods.
What are the manufacturers of 5-chloro-2-fluoro-4-iodopyridine?
There are many families that produce 5-2-aldehyde-4-pyrimidine, and the king has described it.
In the land of the south of the Yangtze River, there is a square named "Ruixiang Square". This workshop is exquisite in technology, and its leader is the one who created it in the way of transformation. They have been focusing on the research of this compound for a long time, and the 5-2-aldehyde-4-pyrimidine produced is of high quality, and it is famous in the rivers and lakes. The craftsmen in the workshop work day and night, using exquisite methods to control the temperature and proportion, so that each batch can be achieved.
And in the middle of the Their research and development methods are not accurate, and they are not accurate in the production of 5-2-aldehyde-4-pyrimidine. It can produce this compound with different ratios of raw materials and different uses according to the needs of all parties, for use in restaurants, workshops, etc.
In addition, the "Miaohuaju" in the south cannot be ignored. Miaohuaju is known for its clever thinking and special method. Its production of 5-2-aldehyde-4-pyrimidine makes good use of the local products in the south, which is another thing. The products are not good, and in some characteristics, it has been improved by others, which has attracted customers from all over the world.
These three are the representatives of them. The world is so big, or there are other places in the market or deep mountains that can also make this 5-2-aldehyde-4-pyrimidine, just wait for those who are interested to dig ears.