Sodium 3-((4-(Benzoylethylamino)-2-Methylphenyl)Azo)-4-Hydroxynaphthalene-1-Sulphonate

This compound is called 3- [ (4- (benzoyl ethylamino) -2 -methylphenyl) azo] -4 -hydroxy naphthalene-1 -sodium sulfonate. According to the ancient classical text of "Tiangong Kaiwu", its chemical structure is as follows:
Looking at this compound, the first sodium sulfonate radical is in one of the naphthalene rings, and the hydroxyl group is attached to the four position. In the naphthalene ring, the aromatic structure of the fused double ring is stable. And there is an azo group, which is connected to the naphthalene ring in three places, and this azo group is connected to a phenyl group. On the phenyl group, there is a methyl group in the two position, and a benzoyl ethylamino group in the four position. In the case of benzoethylamino, the nitrogen atom of ethylamine is connected to the benzoyl group. In the case of ethylamine, one of the hydrogens of ethane is replaced by an amino group; in the case of benzoyl, the benzoic acid is removed from the hydroxyl group. Such various groups are named in a certain order, resulting in the unique chemical structure of 3- [ (4- (benzoethylamino) -2 -methylphenyl) azo] -4 -hydroxy naphthalene-1 -sodium sulfonate. The interaction of each group gives this compound specific chemical properties and reactivity.

This substance (3- ((4- (benzoethylamino) - 2 -methylphenyl) azo) - 4 -hydroxynaphthalene - 1 -sodium sulfonate), in the field of printing and dyeing, its use is quite critical. It can be used as a dye, and by virtue of its own structural characteristics, it can be closely combined with many fiber materials, dyed on fabrics with brilliant colors, and the color is firm. It is not easy to fade after sun exposure and washing, so it is widely used in textile printing and dyeing workshops to make fabrics look colorful.
In the paper industry, it also has important functions. It can give paper a specific color, whether it is daily writing and printing paper or exquisite packaging paper, it can be used to enhance the color, improve the appearance quality and visual effect of the paper, and make the paper more attractive.
In the field of ink manufacturing, this substance is also indispensable. It can be used as an ink colorant to ensure that the ink has good tinting power and stability, so that the printing pattern and text are clear and vivid, and the color is full. It is widely used in books, newspapers, packaging and other printing operations.
Furthermore, in some special analysis and detection scenarios, it can act as a chemical indicator because of its unique chemical properties and color change characteristics. With the change of color, it can sensitively indicate the chemical reaction process or the presence or absence of a specific substance, enabling researchers and inspectors to accurately determine the analysis results.

The physical properties of this substance (3- [ (4- (benzoethylamino) - 2 - methylphenyl) azo] - 4 - hydroxynaphthalene - 1 - sodium sulfonate) are as follows:
Looking at its morphology, at room temperature, it is often in a solid state, mostly powdery, with a fine and uniform texture. This morphology is easy to store and transport, and it is also easy to process and prepare in subsequent processes.
As for the color, it often appears bright colors, or bright colors such as orange red and scarlet. This is due to the specific chromophore group in its molecular structure, which gives it a unique color and luster. In many fields, such as the printing and dyeing industry, it can play a significant dyeing effect.
In terms of solubility, this substance exhibits a certain solubility in water. Due to the presence of sulfonic acid groups in the molecular structure, this group is hydrophilic, allowing the substance to disperse and dissolve in water to form a uniform solution. However, its solubility is also affected by factors such as temperature and pH value. Generally speaking, when the temperature increases, its solubility in water increases; within a specific pH range, the solubility is better. The melting point of
is also one of the important physical properties. The substance has a relatively high melting point, which means that a considerable amount of heat needs to be given to promote it to change from a solid state to a liquid state. This property indicates that the intermolecular force is strong, the structure is relatively stable, and the solid state can be maintained within a certain temperature range. When using the substance in a high temperature environment, its melting point characteristics need to be considered to ensure the stability of its properties. In terms of density, the density of
varies from that of water, depending on its purity and the environmental conditions. This density characteristic is particularly critical when it comes to the consideration of mixing with other substances or distribution in a specific system.

The preparation method of this substance (3- ((4- (benzoethylamino) - 2 - methylphenyl) azo) - 4 - hydroxy naphthalene - 1 - sodium sulfonate), according to the ancient method of "Tiangong Kaiwu", can be described as follows.
Preliminary raw materials need to take phenyl series and naphthalene series with specific structures, such as finding pure 4- (benzoethylamino) - 2 - methylaniline, and 4 - hydroxy naphthalene - 1 - sulfonic acid suitable precursors.
In the kettle, adjust an appropriate amount of alkali solution, such as sodium hydroxide solution, to an appropriate alkaline environment. Add 4- (benzoylethylamino) -2 -methylaniline slowly to the kettle according to a certain ratio. During this period, the temperature needs to be strictly controlled, and the temperature should be kept at a temperature that does not cause the decomposition of raw materials and can promote the reaction, about 30 to 50 degrees Celsius.
After the aniline is stabilized in the alkali solution, then introduce a diazotization reagent in an exquisite way, such as a solution of sodium nitrite and an appropriate amount of acid. When adding the diazotization reagent dropwise, it needs to be slowly injected and stirred at the same time to make the reaction uniform. After the diazotization reaction is completed, the diazo salt solution is obtained.
Start another kettle and place a solution of 4-hydroxynaphthalene-1-sulfonate sodium salt, which is also controlled at a suitable temperature range, about 40 to 60 degrees Celsius. Add the previously prepared diazonium salt solution dropwise to this solution to initiate a coupling reaction. During the process, closely observe the phenomenon of color change and precipitation formation of the reaction.
After the reaction is completed, the impurities are filtered out with a filter, and the filtrate is extracted with an appropriate organic solvent, such as ether or ethyl acetate, and extracted several times to increase the purity of the product. The extract is distilled to remove the organic solvent, leaving a thick product crude.
Then the crude product is recrystallized with water or alcohol solvent. Let stand in a low temperature environment to allow the product to crystallize and precipitate. Finally, the crystals are filtered out and dried at low temperature to obtain a pure 3- ((4- (benzoethylamino) -2 -methylphenyl) azo) -4 -hydroxynaphthalene-1 -sodium sulfonate product. This process requires careful operation by craftsmen, and each step is related to the quality of the product.

This is a substance named 3- ((4- (benzoethylamino) - 2 - methylphenyl) azo) - 4 - hydroxynaphthalene - 1 - sodium sulfonate. During use, the first thing to pay attention to is the properties of this substance. It has a specific chemical structure or affects the objects it comes into contact with. Users need to know its chemical properties in detail to avoid improper contact with the substance to cause reaction or damage.
Furthermore, safety protection is of paramount importance. When using, it is advisable to adapt protective equipment, such as gloves, goggles, etc. Because of its chemical composition, or potential hazards to the skin and eyes, protective measures can avoid physical damage.
Storage should also not be ignored. It should be placed in a dry, cool and well-ventilated place, away from fire, heat and incompatible substances. Due to its structural characteristics, improper environment or its stability is affected, and even dangerous.
The operation in use needs to be precise and standardized. Use according to the established process and dosage, and avoid random changes. Improper operation or dosage errors will not only affect the use effect, but also cause safety problems.
And the place of use should ensure good ventilation. Because it may evaporate gas during use, good ventilation can be discharged in time to ensure air quality and protect the health of users. In this way, be careful to use this substance safely and effectively.