3-BROMOTHIOPHENE-2-BORONIC ACID

Borax, also known as borax, has unique chemical properties. The main component of borax is sodium tetraborate, which is easy to weathering in the air, and its crystalline water will be partially lost.
Borax is colorless and translucent crystals or white crystalline powder, odorless and salty. Its aqueous solution is weakly alkaline and can react with acids. When exposed to strong acids, boric acid will be formed, and boric acid is less acidic.
Borax will change significantly under heating conditions. At first, it will lose its crystalline water and gradually melt into a transparent glassy substance. This glassy substance can react with a variety of metal oxides to form borates with specific colors. This property is often used in analytical chemistry to identify metal ions.
In addition, borax has certain reducing properties. In some chemical reaction systems, it can provide electrons to other substances, thus promoting the smooth progress of the reaction. Under specific conditions, borax can react with some oxidizing substances, oxidize itself, and change its valence state.
The chemical properties of borax make it widely used in many fields. In industry, it is often used in glass, ceramics and other industries; in the medical field, it also has corresponding uses due to some special properties. In short, borax plays an indispensable role in different fields due to its unique chemical properties.

The main use of 3-borax-2-boric acid is very good. Borax, in the field of engineering, is often used as a metallurgical melting aid. In smelting, borax can reduce the melting of stone, making it easier to melt, and the efficiency of improving gold is also increased. And in glass engineering, adding borax can improve the properties of glass, making it more resistant, corrosion-resistant, and good light. In addition, in enameling, borax can be used as a melting aid and emulsion, making the enamel surface smoother, more beautiful, and increasing its solidification.
The use of boric acid is also good. In the way, boric acid has a weak disinfection and anti-corrosion effect, and can be used to make paste, wash, etc., to treat skin diseases, eye diseases, etc. In addition, boric acid can be used as a trace element fertilizer. Boron is indispensable for plant growth. Applying boric acid fertilizer can promote the flowering and fruit of plants, increase their disease resistance, and improve the amount of crops. In the field of chemical performance, boric acid can determine the pH value of chemical products, and has antibacterial effect, which can ensure the quality of chemical products. In addition, in the field of flame retardant materials, boric acid and its compounds can cause the material to burn, and can form a glass barrier in case of fire, blocking the amount of oxygen and improving the fire safety performance of the material.

To prepare 3-bromopyridine-2-carboxylic acid, the method is as follows:
Take pyridine as the base first, and then brominate it. In a suitable reaction vessel, put pyridine and an appropriate amount of brominating agent, such as bromine and catalyst, like iron powder. Heating at controlled temperature, the bromine atom is introduced into the third position of the pyridine ring to obtain 3-bromopyridine. This step requires attention to the reaction temperature and the amount of brominating agent. If the temperature is too high or the amount of bromine is too high, the by-product of polybromination may occur.
Convert 3-bromopyridine to 3-bromopyridine-2-carboxylic acid One method is to react 3-bromopyridine with a suitable carboxylating agent, such as carbon dioxide. In an autoclave, with an appropriate base as a catalyst, such as magnesium reagent, it reacts with carbon dioxide after initiation. After acidification, 3-bromopyridine-2-carboxylic acid can be obtained. This process requires strict control of reaction pressure, temperature and reaction time. Insufficient pressure or too short time can cause incomplete reaction. Or first 3-bromopyridine is made into Grignard reagent, with magnesium and anhydrous ether, so that 3-bromopyridine interacts with it. After forming Grignard reagent, it reacts with carbon dioxide and is also acidified to obtain 3-bromopyridine-2-carboxylic acid. This path should ensure that the reaction system is anhydrous, otherwise Grignard reagent is easy to decompose and affect the formation of products. Each method has its advantages and disadvantages. In practice, it is selected according to factors such as the availability of raw materials, cost and difficulty of reaction conditions.

3-Saltpeter, 2-Saltpeter has the following things to pay attention to in the process of storage and storage:
Saltpeter has a strong and active nature, and it is difficult to avoid the sun and rain. Saltpeter is easily soluble in water and loses its character, and it is in a tidal environment, or it may lead to a kind of melting, causing its product to suffer.
Furthermore, the device of storage is used for fixing. Saltpeter is difficult to react to in the air. If the density is not good, or the leakage is not good, it will be used for its use. And the secret device can prevent the mixing of sulfur materials and ensure its integrity.
The problem of
can not be ignored. Seek solidification in order to avoid bumps and shocks. Saltpeter is subject to strong earthquakes, or there is a risk of ignition and explosion. On the way, it is not suitable to use saltpeter to prevent heights, exposure to the scorching sun, and fumigation boats in the heat.
The things that accompany you should also be careful. Saltpeter should not be combined with flammable, explosive, and acidic things. When the two meet, they may cause a violent reaction, and it will become a big problem.
Those who handle saltpeter must be familiar with its properties, follow the rules, and be careful to protect the safety. If there is a slight mistake, it will stand up and endanger human life. It cannot be ignored.

In today's world, business conditions are changeable, and prices also float with the market. It is difficult to determine the market price of 3-hydroxymethyl-2-butanoic acid. However, looking at all the market conditions, the price often changes due to the quality of the quality, the amount of supply, and the urgency of demand.
Guanfu chemical products, whose quality is pure, the price must be high; those who are miscellaneous, the price will be low. If 3-hydroxymethyl-2-butanoic acid is refined flawlessly, it is demanded by various factories, and the price may be high. And when there is less supply and more demand, its price will also rise; if the supply exceeds the demand, the price will decline.
Furthermore, the distance of the city and the cold and heat of the time are all related to the price. In nearby cities, the freight is saved and the price is low; in distant cities, if the freight is added, the price will be high. As for the cold and heat of the time, it will affect the chemical production system, or increase or decrease the production, resulting in price changes.
According to past market conditions, if the market conditions are stable, the market price of this product may be between a hundred gold and a thousand gold per unit. However, this is only an approximate number. The market conditions are ever-changing, and it is difficult to be precise. To know the exact price, you need to ask the dealer and observe the real-time market conditions before you can get it.
Businesspeople are in the market, and when they judge the situation, observe the changes in market prices, and know the situation of supply and demand, they can make profits and avoid losses. The same is true for the trade of 3-hydroxymethyl-2-butanoic acid.