What are the main uses of 4- (4 - Hydroxyphenyl) Azobenzenesulfonic Acid?
4 - (4 -Hydroxyphenyl) azobenzenesulfonic acid, which is widely used. In the dye industry, it is often an important raw material. Due to its unique molecular structure, a variety of bright and fastness dyes can be prepared through specific processes. Such dyes can be widely used in fabric dyeing to make fabrics colorful and long-lasting.
In the field of analytical chemistry, it also plays a key role. It can be used as an acid-base indicator. By using its own color to change with the pH of the solution, it can keenly indicate the change of the acid-base properties of the solution, and help to accurately determine the end point of chemical reactions, providing an important basis for many chemical analysis experiments.
In biomedical research, because of its certain biological activity and special structure, it can specifically interact with certain substances in the body. Therefore, in the early stage of drug development, it is often used for the labeling and tracing of bioactive substances, which helps to deeply explore the metabolic pathways and action mechanisms of substances in the body, and lays the foundation for the creation of new drugs.
In addition, in the field of optoelectronic materials, with the development of science and technology, the demand for special functional materials is increasing day by day. 4 - (4-hydroxyphenyl) azobenzenesulfonic acid can be used as a potential optoelectronic material component due to its unique optical properties, providing new ideas and possibilities for the research and development of new optoelectronic materials. Overall, this substance plays an important role in many fields, promoting the progress and development of technology in various fields.
What are the physicochemical properties of 4- (4 - Hydroxyphenyl) Azobenzenesulfonic Acid
The physicochemical properties of 4 - (4 -hydroxyphenyl) azobenzenesulfonic acid can be investigated. The color state of this substance is mostly in the shape of a powder at room temperature, the color may be light yellow, the texture is fine, and the appearance is quite uniform.
In terms of its solubility, it can show a certain state of solubility in water. This sulfonic acid group is hydrophilic and can interact with water molecules by hydrogen bonding and other forces, so it has good solubility in polar water environment. However, in non-polar organic solvents such as ether and benzene, its solubility is very small, and its molecular structure polarity does not match that of non-polar solvents.
In terms of thermal stability, 4- (4-hydroxyphenyl) azobenzenesulfonic acid has considerable stability. Under moderate heating, its molecular structure can be maintained, but if the temperature is too high, beyond its decomposition temperature, the chemical bonds in the molecule can be destroyed, resulting in decomposition reactions and loss of structural integrity.
Its acid and alkali properties are also considerable. Sulfonic acid groups are strongly acidic groups that can ionize hydrogen ions in solution, so the aqueous solution of this substance is acidic and can neutralize with bases to form corresponding salts and water.
Because its molecules contain azobenzene structures, this structure is quite sensitive to light. When irradiated with light of a specific wavelength, it can cause changes in the molecular configuration, and this photoisomerism property has potential application value in the fields of optical control materials.
4- (4 - Hydroxyphenyl) Azobenzenesulfonic Acid
The synthesis method of 4- (4 -hydroxyphenyl) azobenzenesulfonic acid has been known since ancient times. There are many methods and each has its own strengths. Today is the way for you.
One of them can be prepared by the diazotization-coupling reaction of p-aminobenzenesulfonic acid and p-hydroxyaniline. First take p-aminobenzenesulfonic acid, and under suitable conditions, perform diazotization with sodium nitrite and inorganic acid. This step requires careful temperature control. Generally, at low temperatures, such as 0-5 ° C, p-aminobenzenesulfonic acid is converted into diazonium salts. Because of the active nature of diazonium salts, it is easy to decompose at a slightly higher temperature.
Then, the obtained diazonium salt is mixed with an alkaline solution of p-hydroxyaniline for coupling reaction. This process also requires attention to the reaction conditions, such as pH value, temperature, etc. The alkaline environment is conducive to the coupling reaction, and the pH is usually controlled in the weakly alkaline range, about 8-10. The temperature should not be too high to ensure the purity and yield of the product.
Second, 4-nitroaniline is also used as the starting material. 4-nitroaniline is first reduced to 4-aminoaniline, and the commonly used reducing agents are iron powder, sodium sulfide, etc. After reduction, 4-aminoaniline is diazotized to form diazonium salts. The compound is coupled with p-hydroxybenzenesulfonic acid under suitable conditions to obtain 4- (4-hydroxyphenyl) azobenzenesulfonic acid.
In addition, there are other synthesis paths, but the above two are more commonly used. All synthesis methods require fine operation, and the control of reaction conditions and the proportion of raw materials should not be ignored in order to obtain pure and high-yield products.
What is the price range of 4- (4 - Hydroxyphenyl) Azobenzenesulfonic Acid in the market?
4 - (4 -Hydroxyphenyl) azobenzenesulfonic acid, this product is in the market price range, it is difficult to say for sure. The price often varies due to many reasons, such as the quality, the amount purchased, the ups and downs of market conditions, and even the different seasons.
In the past, if the quality was ordinary, the price per catty might be between tens of dollars and hundreds of dollars. However, if it is a refined product, it is specially used for special needs, such as for fine chemicals or scientific researchers, the price should be higher, or to hundreds of dollars per catty.
If the purchase volume is quite large, the merchant may give a discount in order to attract customers due to profit considerations, so the unit price can be reduced. On the contrary, if you only buy a little, in order to maintain your livelihood, the price charged by the merchant may be slightly higher.
Furthermore, the market situation is also critical. If raw materials are abundant, and there are many producers, the supply exceeds the demand, the price may decline. If raw materials are rare, or if there are few producers due to other reasons, the supply will exceed the demand, the price will rise.
The impact of the season should not be ignored. If there are certain periods, the price may also be different because there are few people using them, or because of the convenience of transportation.
If you want to know the exact price, you should consult the merchant of chemical materials, or check in detail on the trading platform, in order to obtain the current real price.
4- (4 - Hydroxyphenyl) Azobenzenesulfonic Acid
4 - (4 -Hydroxyphenyl) azobenzenesulfonic acid, this is a chemical substance. During its use, many things need to be paid attention to.
First of all, it is about safety. This substance may be toxic and irritating, and it is necessary to take protective measures when coming into contact. Wear protective clothing, protective gloves and goggles to prevent it from coming into contact with the skin and eyes. In case of accidental contact, rinse with plenty of water immediately and seek medical attention according to the specific situation. When operating, also ensure that it is carried out in a well-ventilated place to avoid inhaling its dust or volatile gases to prevent damage to the respiratory tract.
Second, in terms of storage. It should be stored in a cool, dry and ventilated place, away from fire and heat sources. It should be stored separately from oxidants, acids, alkalis, etc., and must not be mixed to prevent chemical reactions from occurring and causing danger. At the same time, the storage area should be marked for easy identification and management.
Furthermore, the use specifications are discussed. Before use, it is necessary to understand its chemical properties and reaction characteristics in detail, and act in strict accordance with the operating procedures. Precisely control the dosage of use, and do not increase or decrease at will, so as not to affect the experimental results or cause safety problems. During use, the waste generated should be properly disposed of in accordance with relevant regulations, and must not be discarded at will to prevent pollution to the environment.
In conclusion, when using 4- (4-hydroxyphenyl) azobenzenesulfonic acid, safety is paramount, and relevant specifications and requirements are strictly followed to ensure the safety of the operation and the smooth progress of the experiment.