3-Bifurcation-1,2-naphthalic anhydride, its chemical properties are as follows:
This substance is white to pale yellow needle-like crystal with a high melting point of 268-272 ° C. Its chemical properties are relatively active, and the acid anhydride group has strong reactivity.
In the hydrolysis reaction, it is easy to open the ring in contact with water to form 3-bifurcation-1,2-naphthalic acid. This reaction can occur under mild heating and in the presence of water. The acid anhydride reacts with water, and the anhydride bond breaks to form a carboxyl group.
When it meets with alcohols, an alcoholysis reaction can occur to form ester products. For example, when reacting with ethanol, under the action of a catalyst, one carbonyl group in the anhydride binds to the hydroxyl group of the ethanol to form an ester group, and the other carbonyl group is converted to a carboxyl group to form 3-dimethylene-1,2-naphthalate monoethyl ester.
This substance can also react with amines to form amides. Taking the reaction with methylamine as an example, the amino group of methylamine attacks the carbonyl carbon of the anhydride, undergoes nucleophilic substitution, forms an amide bond, and generates the corresponding 3-dimethylene-1,2-naphthalamide derivative.
In some organic synthesis reactions, 3-Bifurcation-1,2-naphthalic anhydride can be used as an important intermediate. Because the naphthalene ring has a certain conjugate system in its structure, which endows the molecule with certain stability and special electronic effects, when constructing more complex organic compounds, different functional groups can be introduced through the reaction of acid anhydride groups, so as to achieve various organic synthesis goals, which are widely used in fine chemical industry, pharmaceutical synthesis and many other fields.

3-Bifurcation-1,2-naphthalene dimethyl anhydride has the following main uses:
First, it is of great significance in the field of dye synthesis. It can be used as a key intermediate for the synthesis of various types of dyes, such as anthraquinone dyes. With the help of specific chemical reactions, 3-bifurcation-1,2-naphthalene dimethyl anhydride can be cleverly combined with other compounds to construct dye molecules with specific structures and colors. Such dyes are widely used in the textile printing and dyeing industry, giving fabrics rich and diverse, bright and lasting colors, which greatly satisfies people's pursuit of textile aesthetics.
Second, it plays an indispensable role in the pharmaceutical and chemical industries. It is often used as a starting material or intermediate to participate in the synthesis process of many drugs. Due to its unique chemical structure, it can introduce specific groups and activities into drug molecules, helping to develop drugs with unique pharmacological activities and therapeutic effects. For example, in some synthetic pathways for the treatment of cardiovascular diseases, anti-tumor and other drugs, 3-dimethyl anhydride is an important player.
Third, it performs well in the field of plastic and resin modification. Adding it to plastic or resin systems can significantly change the properties of materials. It can react with polymer molecules to enhance the interaction between molecules, thereby improving the heat resistance, mechanical strength and chemical stability of materials. Modified plastics and resins are widely used in automotive manufacturing, electronic appliances and other fields that require strict material properties, prolonging product service life and improving product quality.
Fourth, it also has a place in the field of organic synthesis catalysts. Some derivatives based on 3-dimethylene anhydride have catalytic activity and can catalyze many organic chemical reactions. In some condensation reactions and cyclization reactions, it can effectively reduce the activation energy of the reaction, speed up the reaction rate, improve the reaction yield, and has good selectivity to guide the reaction in the desired direction, providing an efficient and convenient method for organic synthesis chemistry.

3-N-1,2-naphthalene dimethyl anhydride is an organic compound, and its preparation method is quite complicated. Although "Tiangong Kaiwu" is a great work of science and technology in the Ming Dynasty, the method of chemical synthesis at that time was still less precise than it is today, so the specific preparation method of this compound is not included in the book. The method of preparing this compound is common in the future.
Generally speaking, 3-N-1,2-naphthalene dimethyl anhydride can be obtained by dehydration and cyclization of 1,2-naphthalene dicarboxylic acid. First take an appropriate amount of 1,2-naphthalene dicarboxylic acid and place it in the reactor, and add an appropriate amount of dehydrating agent, such as acetic anhydri Here, acetic anhydride is not only a dehydrating agent, but also helps to promote the reaction in the direction of anhydride formation. When heated to a suitable temperature, about 150-200 ° C, the reaction can occur smoothly in this temperature range. As the temperature increases, 1,2-naphthalene dicarboxylic acid is gradually dehydrated, and the molecule is cyclized, then 3--1,2-naphthalene dimethyl anhydride is formed. During the reaction process, the degree of reaction can be monitored by means of thin-layer chromatography. When the raw material point disappears or drops to a very low level, the reaction is regarded as basically complete. After that, the reaction system is cooled and the reaction products are separated and purified. The method of recrystallization is often used to select suitable solvents, such as benzene, toluene, etc. After multiple recrystallization, high-purity 3-1, 2-naphthalene dimethyl anhydride can be obtained.
Another naphthalene as a starting material is oxidized to obtain 1,2-naphthalene quinone, and then converted into 1,2-naphthalene dicarboxylic acid through a series of reactions, and finally dehydrated and cyclized to obtain the target product. The oxidation of naphthalene is often carried out in the presence of air or oxygen as an oxidant in the presence of a catalyst, such as a vanadium catalyst. The subsequent steps are similar to the method using 1,2-naphthalene dicarbox Although the raw materials are easily available in this way, there are many reaction steps, and the reaction conditions of each step need to be carefully controlled to ensure the yield and purity.

3-Octanediamide-1,2-octanediamide is hidden in the sea, and it is very important to pay attention to things like this. This is a special nature, hidden in the sea, it must be hidden in the place where things are dry. If it is a place where it is hidden, it is easy to be damaged, and the strength is attenuated. And it is hidden in a secret, do not let the beetles and beetles invade it. If it is polluted, the beetle will enter the sea; if the beetle eats it, the shape of the beetle will be reduced, and the use of it will be effective and harmful to people.

Send it to the sea, and it will be especially difficult for it to hold. It must be filled with tools that are fixed to prevent earthquakes and falls. On the way to the road, the road is rough, and the beetle And do not destroy other things, to prevent them from being formed in the same phase. Or in case of acid, the nature of the chemical phase will be excited, and the temperature will be high.
In addition, when it is sent, the temperature will also be properly controlled. It is easy to be cold, and the temperature of its molecules will be low or low; it will quickly disperse and lose its original effect. Therefore, those who are cold must use the equipment, observe it, and control it, so that it can be sent on the way, so as to ensure its good quality.
In this way, 3-carboxylamine-1,2-octanediamide should not be ignored when it is hidden in the warehouse, the solidification of utensils, the avoidance of objects, and the degree of resistance. In this way, it can be guaranteed that its power is complete and used for the benefit of people.

I have heard your inquiry about the approximate market price of 3-dimethyl anhydride. This compound is quite important in the chemical industry, and its price is often influenced by many factors.
First of all, in terms of raw materials, the price fluctuation of basic raw materials such as naphthalene has a great impact on the cost of 3-dimethyl anhydride. If the supply of naphthalene is abundant and the price is low, the production cost of 3-dimethyl anhydride may drop; conversely, if the supply of naphthalene is tight and the price soars, the cost will increase, and the market price will also rise.
Furthermore, the production process is also critical. Advanced and efficient production processes can improve production efficiency, reduce energy consumption, and then control costs, making products more competitive in the market price; if the process is backward and the cost is high, the price will be higher.
The market supply and demand situation is even more important. When the market has strong demand for 3-meta-1,2-naphthalene dimethyl anhydride and relatively insufficient supply, its prices tend to rise; if the market demand is weak and the supply is excessive, the price will be under downward pressure.
Based on multi-party information, in the current market environment, the market price of 3-meta-1,2-naphthalene dimethyl anhydride is roughly in the range of [X] yuan/ton to [X] yuan/ton. However, the market is constantly changing, and prices can also change at any time. It is necessary to pay close attention to industry trends, raw material price trends, and market supply and demand changes in order to accurately grasp their prices.