Sodium 3-Hydroxy-4-(2-Hydroxy-1-Naphthylazo)-1-Naphthalenesulphonate

This is a chemical substance, and its Chinese name may be "Sodium-3-hydroxy-4- (2-hydroxy-1-naphthalene azo) -1-naphthalene sulfonate". Looking at its name, it can be seen that it contains sodium and has many specific substituents on the naphthalene ring, such as hydroxyl, naphthalene azo and sulfonate groups.
In the era of "Tiangong Kaiwu" in the past, although there was no such fine chemical nomenclature and synthesis method. However, "Tiangong Kaiwu" details many creative techniques, and there are also descriptions of chemical related elements such as metal smelting, pottery making, dyeing, etc. At that time, the method of dyeing was to use natural plants, minerals, etc. as dyes.
If this chemical substance is viewed from the perspective of "Tiangong Kaiwu", it is the result of in-depth research and fine synthesis in the field of chemistry. Today's chemical synthesis technology can precisely introduce specific groups to prepare special structural compounds. This sodium-3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -1-naphthalene sulfonate, or has special uses in the field of dyes and pigments, because it contains an azo structure, or can impart a specific color and stability to the substance. It can be used as a new type of dye for fabric dyeing. Compared with the natural dyes recorded in "Tiangong Kaiwu", it may have the advantages of brighter color and better fastness; in modern chemical analysis, materials science and other fields, or because of its unique chemical structure and properties, it has different applications, such as for surface modification of specific materials, etc. This is the embodiment of the development of later science and technology and the deepening of material understanding and utilization.

Sodium-3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -1-naphthalene sulfonate, which is the name of a chemical substance. It has a wide range of uses and is used in many fields.
In the field of analytical chemistry, it is often used as a color reagent for metal ions. Because it combines with specific metal ions, it will show a unique color change, which can be used to achieve qualitative and quantitative analysis of metal ions. For example, when detecting certain transition metal ions, it can react with metal ions keenly to form complexes with special colors, which is convenient for researchers to accurately determine the content of metal ions, just like in ancient times when special reagents were used to identify the composition of substances and make hidden things visible.
In the dye industry, it also occupies an important position. With its own chemical structure and properties, it can be used as a key raw material for synthetic dyes. The dyes produced by it are bright in color and good in stability, which can meet the diverse needs of textile, printing and dyeing industries. Just like the dyers in ancient times, they carefully prepared dyes to give fabrics brilliant colors.
In biochemical research, it also plays an important role. It can be used to label biomacromolecules and assist in the study of biochemical reactions and molecular interactions in living organisms. By tracking its markers, researchers can gain in-depth insight into the mysteries of the microscopic world in living organisms, just like following clues to explore mysterious places.
In the field of materials science, can participate in the preparation of functional materials. After special processing, the material has unique optical, electrical or adsorption properties, opening up new paths for the research and development of new materials, just like the ancients exploring new materials, injecting new vitality into the development of technology.
This chemical substance has significant uses in many fields such as analysis, dyes, biochemistry and materials. It is like a multi-purpose key that opens the door to different fields and promotes the development of science and technology and industry.

Sodium-3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -1-naphthalene sulfonate, this substance is more specific in chemical preparations. Its physical properties, under normal conditions, may be in the state of powder, the color may be bright or elegant, depending on the specific preparation conditions. Looking at its appearance, the texture may be fine and uniform, like a finely ground powder, smooth to the touch, without roughness.
When it comes to solubility, it may show certain solubility characteristics in water. When exposed to water, or slowly diffuses, some ionic components gradually dissociate and integrate into the water body, making the solution exhibit a specific ionic environment. However, the degree of dissolution is not uncontrolled, or is affected by many factors such as temperature and pH of the solution. When heating up, the dissolution rate may be accelerated, allowing more ingredients to integrate into the liquid phase; and changes in the acid-base environment may also affect its dissociation balance and the amount of left and right dissolution.
As for chemical properties, because its structure contains azo groups, this is a part of active chemical properties. Azo structures are easily excited by external factors such as light and heat, resulting in isomerization reactions, or molecular configuration changes, which in turn affect the overall chemical activity. And hydroxyl and sulfonate groups also give them a certain reactivity. Hydroxyl groups can participate in various organic reactions such as esterification and substitution, while sulfonate groups give compounds certain hydrophilic and ionic characteristics, and may have unique performances in ion exchange and complexation reactions. This compound participates in various chemical processes and exhibits diverse chemical behaviors in specific chemical systems or with other substances.

The production process of 3-hydroxy-4- (2-hydroxy-1-naphthyl azo) - 1-naphthalene sulfonate of sodium phosphorus is an important matter in the chemical industry. The process steps are roughly as follows:
The first is the selection and preparation of raw materials. It is necessary to select high-purity 3-hydroxy-1-naphthalene sulfonate sodium, and 2-hydroxy-1-naphthalamine and other raw materials to ensure that the raw materials have excellent texture and are free of impurities. This is the foundation of the process.
The second is the coupling reaction. In a specific reactor, inject an appropriate amount of water and adjust the temperature to a suitable range, usually between 0 and 10 degrees Celsius. Slowly add the prepared sodium 3-hydroxy-1-naphthalenesulfonate, until it is fully dissolved to form a uniform solution. Then, according to the precise ratio, add the diazotized 2-hydroxy-1-naphthalamine dropwise to the reactor. This process needs to be strictly monitored to control the reaction rate and prevent it from overheating. At the same time, keep stirring to make the reactants fully contact and promote the coupling reaction to proceed smoothly. During the reaction, the color of the solution will also gradually change. This is the characterization of the reaction process, and the degree of reaction can be observed according to the color change.
The other is the treatment after the reaction. When the coupling reaction is complete, the reaction solution needs to be treated. First adjust the pH value with an appropriate amount of acid or base to a suitable range to stabilize the product. Next, apply a filtration method to remove insoluble impurities and obtain a clear filtrate. The filtrate is concentrated to reduce the amount of solvent, so that the concentration of the product gradually increases. When concentrating, pay attention to the control of temperature and pressure to prevent the decomposition or deterioration of the product. Then, use the method of cooling and crystallization to reduce the temperature so that the product crystallizes and precipitates from the solution. After the crystallization is completed, it is filtered again to obtain the crystallized product, washed with an appropriate amount of solvent, except for the impurities attached to the surface, and finally dried to obtain the pure sodium of 3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -1-naphthalene sulfonate finished product.
The whole production process, each step needs to be carefully controlled, temperature, pH value, reaction time and other parameters, a slight difference will affect the quality and yield of the product. Only by being careful and operating according to the standard process can high-quality products be obtained.

I look at your words, but I am inquiring about the market price of "3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -1-naphthalenesulfonate sodium". However, the price of this chemical often changes for many reasons.
First, purity is essential. If its purity is extremely high and there are few impurities, the price will be high; if its purity is slightly lower and contains some impurities, the price may drop. Second, the situation of supply and demand is also serious. If there are many people who want it, and there are few people who supply it, the price will rise; if the market supply exceeds demand, the price may decline. Third, the manufacturers are different, and their production processes, costs, etc. are different, resulting in different product pricing. Well-known large factories, with good quality, or high prices; products from small factories, or low prices.
In the context of "Tiangong Kaiwu", although it is not as complex as today's fine chemicals, it can be known that the price of materials varies according to quality and supply and demand. Today, if you look for intermarket prices for chemicals, you can explore chemical raw material trading platforms, consult chemical product suppliers, or refer to chemical industry information, so that you can get their approximate prices. However, due to the above reasons, it is difficult to determine the exact price, and it can only be found in real-time business conditions.