Sodium 4-[(2-Hydroxy-1-Naphthyl)Azo]Benzenesulphonate

Sodium-4- [ (2-hydroxy-1-naphthyl) azo] benzenesulfonate, this is an organic compound. Looking at its name, it can be known that the salt formed by sodium ion and [ (2-hydroxy-1-naphthyl) azo] benzenesulfonate ion.
[ (2-hydroxy-1-naphthyl) azo] benzenesulfonate ion has a delicate structure. 2-Hydroxy-1-naphthyl moiety, the naphthalene ring is a fused dicyclic aromatic hydrocarbon structure, and there is a reactive hydroxyl group at position 1, and the hydroxyl oxygen contains lone pair electrons, which can participate in hydrogen bond formation and many chemical reactions. Position 2 is connected to the azo group -N = N-, and the azo group is the chromophore, which gives the compound color characteristics and is widely used in the field of dyes. The other end of the azo group is connected to the benzenesulfonic acid group. The benzene ring is a stable hexavalent aromatic ring, and the sulfonic acid group -SO is highly hydrophilic, which makes the compound soluble in water or polar solvents.
When this compound binds to sodium ions to form ionic bonds, it maintains structural stability by electrostatic interaction between ions. This salt can be ionized in aqueous solution due to the hydrophilicity of sulfonate, and sodium ions are free. [ (2-hydroxy-1-naphthyl) azo] benzenesulfonate ions are also dispersed in solution, showing unique chemical properties and physical properties, and play important roles in chemical engineering, printing and dyeing and other fields.

Sodium-4- [ (2-hydroxy-1-naphthyl) azo] benzenesulfonate, which is widely used. In the field of industrial dyeing, it is often used as a dye. With its own structural characteristics, it can be firmly combined with many fabrics. The dyed fabrics are bright in color and have good light resistance and washable fastness. When printing and dyeing, it can be accurately prepared according to different fabric characteristics and desired colors to achieve ideal dyeing results.
In the field of analytical chemistry, it can be used as a color reagent for metal ions. Because it can form a specific color complex with specific metal ions, it can be sensitive and accurate to determine the concentration of metal ions by colorimetry or spectrophotometry, and has important applications in water quality monitoring, ore composition analysis and other fields.
In the field of biochemical research, sometimes by means of its interaction with some biomacromolecules, the structure and function of biomacromolecules are studied. For example, after binding to proteins, the fluorescence properties of proteins may be changed, and the conformational changes of protein molecules can be explored to provide important clues for revealing the mechanism of life activities.
In summary, sodium-4- [ (2-hydroxy-1-naphthyl) azo] benzenesulfonate plays an indispensable role in many aspects such as industry, analytical chemistry, and biochemical research, and is of great significance to promoting the development of related fields.

Sodium 4- [ (2 - Hydroxy - 1 - Naphthyl) Azo] Benzenesulphonate, the Chinese name is often referred to as 1- (2 - Hydroxynaphthalene azo) benzene - 4 - sodium sulfonate. The physical properties of this substance are as follows:
Its appearance is mostly orange-red crystalline powder. In terms of solubility, it is soluble in water and can exhibit good solubility in water. This property makes it very convenient in many chemical processes or industrial applications involving the aqueous phase.
From the perspective of melting point, it has a specific melting point value. This melting point is one of the key indicators of its physical properties, and the phase transition from solid to liquid occurs at a specific temperature.
Its density is also a fixed value, which is of great significance in the consideration of the relationship between the mass and volume of the substance, as well as in the relevant engineering design and process calculations.
In addition, the substance may also have a certain solubility in some organic solvents in different solvent systems, except water, but the degree of solubility will vary depending on the properties of the solvent. Moreover, its solution often exhibits a specific color, which depends not only on the chromophore in the molecular structure, but also closely related to the surrounding chemical environment. This color property has important application value in fields such as analytical detection and dyeing. In its solid state, the crystalline structure also affects its appearance and physical properties such as gloss and hardness, which in turn play different roles in different industrial production and application scenarios.

The method of preparing sodium 4- [ (2-hydroxy-1-naphthyl) azo] benzenesulfonate is quite exquisite. The important thing is to take an appropriate amount of 2-hydroxy-1-naphthol and place it in a clean reactor. The kettle needs to be carefully washed to remove all impurities and avoid disturbing the reaction. Then slowly add an appropriate amount of sodium nitrite. In this process, be sure to pay attention to the rate of addition. If it is too fast, the reaction may be out of control, and if it is too slow, it will take too much time. At the same time, in another container, prepare a suitable concentration of hydrochloric acid solution. After the first two are mixed, the hydrochloric acid solution is slowly dripped in, and the stirring must be uniform to make it fully react. This is a key step in the formation of diazonium salts.
Then, take an appropriate amount of sodium benzenesulfonate and carefully add it to the above reaction system. When adding, when closely observing the reaction phenomenon, the temperature also needs to be precisely controlled, and it should be maintained within a specific range. Usually a moderate low temperature is preferred, between 0 and 5 degrees Celsius. If the temperature is too high, the product may mutate. Continue stirring, and after a period of time, the reaction gradually becomes complete, and a mixed solution containing 4 - [ (2-hydroxy-1-naphthyl) azo] sodium benzenesulfonate can be
Finally, separate and purify the mixture. First, use a suitable filtration device to filter out the insoluble matter in it, and then the filtrate is crystallized to obtain a crude product. The crude product needs to be recrystallized with an appropriate solvent and repeated many times to achieve a high purity of 4- [ (2-hydroxy-1-naphthyl) azo] benzenesulfonate sodium. The whole preparation process requires careful handling at every step, and many details such as raw material dosage and reaction conditions should not be ignored to obtain high-quality products.

Sodium + 4 - [ (2 - Hydroxy - 1 - Naphthyl) Azo] Benzenesulphonate, when using, there are several ends that should be paid attention to.
First, the toxicity and safety of this substance cannot be ignored. Although the exact degree of toxicity is not known, there are many potential hazards of chemical agents, so when using, strict safety procedures should be followed. Such as protective equipment, including gloves, goggles, protective clothing, etc., to prevent it from coming into contact with the skin and eyes, if you accidentally touch it, you should immediately rinse it with plenty of water and seek medical treatment according to the actual situation.
Second, its chemical properties are quite critical. This compound contains specific functional groups and may react differently in different chemical environments. Therefore, when using it, make sure to clarify its compatibility with surrounding substances. Do not allow it to be co-stored or mixed with chemicals that may react violently, so as to avoid danger, such as explosion, fire and other accidents.
Furthermore, the method of storage also needs attention. It should be placed in a dry, cool and well-ventilated place, away from direct sunlight and heat sources. Due to environmental factors such as temperature and humidity, or affecting its stability, it will deteriorate and lose its effectiveness, or even pose a safety hazard.
In addition, during use, accurate measurement and operation steps cannot be ignored. According to the needs of the experiment or production, accurately measure the dosage, follow the established operating procedures, and do not change it without authorization to ensure the accuracy of the results and the safety of the process.
At the end of the use, the disposal of the waste must also be in compliance. Do not discard at will, but dispose of it properly in accordance with local environmental regulations to prevent environmental pollution.