What are the main uses of 4-Hydroxybenzenesulfonic Acid Cas 98-67-9?
4-Hydroxybenzenesulfonic acid (Cas 98-67-9) has a wide range of uses. In the field of industry, it is an important raw material for the preparation of dyes. It can be combined with other compounds through specific chemical reactions to produce colorful dyes, which are used in textiles, printing and dyeing and other industries to make fabrics have a brilliant color.
In the field of pharmaceutical and chemical industry, it also plays a role that cannot be ignored. It is often an intermediate for the synthesis of certain drugs. Through fine chemical synthesis steps, it can be converted into pharmaceutical ingredients with specific pharmacological activities through ingenious reactions with other chemical substances, contributing to human health.
Furthermore, in the preparation of surfactants, 4-hydroxybenzenesulfonic acid also has a place. Its characteristics can help improve the performance of surfactants, enhance their decontamination and emulsification effects, and are used in many cleaning products to provide assistance for the cleanliness of daily life.
In addition, in some organic synthesis reactions, it can act as a catalyst, accelerate the process of the reaction, improve the reaction efficiency, reduce the conditions required for the reaction, and play a key role in the field of organic chemical synthesis, promoting the development of organic synthetic chemistry.
What are the physical properties of 4-Hydroxybenzenesulfonic Acid Cas 98-67-9?
4-Hydroxybenzenesulfonic acid (Cas 98-67-9), its physical properties are as follows:
This substance is mostly white to off-white crystalline powder at room temperature. Looking at its properties, it is fine and uniform in texture. Its melting point is quite critical, about 300 ° C. At this temperature, the substance will gradually change from a solid state.
When it comes to solubility, it shows good solubility in water, easily soluble in water, just like a fish getting water. Water molecules interact with the substance molecules and disperse uniformly to form a uniform and stable solution. However, in organic solvents, its solubility is different. In common organic solvents such as ethanol, the solubility is relatively limited, and it is difficult to achieve the degree of solubility in water.
The density of 4-hydroxybenzenesulfonic acid is also an important physical property. Its density makes the substance occupy a certain space and weight characteristics during storage and transportation, providing an important reference for practical operation.
In addition, its appearance is stable in color and shape. Under conventional environmental conditions, it is not easy to change rapidly due to external minor factors. In the fields of industrial production and experimental research, this stability lays the foundation for its application, so that the relevant operation and use process can be reasonably planned and implemented according to its inherent physical properties.
Is 4-Hydroxybenzenesulfonic Acid Cas 98-67-9 chemically stable?
4-Hydroxybenzenesulfonic acid (Cas 98-67-9), its chemical properties are quite stable under normal temperature and pressure.
This compound is acidic, and the sulfonic acid group can ionize hydrogen ions, so it can exhibit acidic properties in water, and can neutralize with alkali substances, just like acid and base, generating corresponding salts and water.
From a structural perspective, the hydroxyl group is connected to the benzene ring, and the hydroxyl group can increase the electron cloud density of the benzene ring, making the benzene ring more prone to electrophilic substitution reactions, such as halogenation and nitrification. However, the sulfonic acid group is a strong electron-absorbing group, which reduces the electron cloud density of the benzene ring, and affects the reactivity of the benzene ring to a certain extent. The two check and balance each other and jointly determine the performance of the substance in the electrophilic substitution reaction.
In terms of redox, under normal circumstances, the substance is more difficult to oxidize or reduce. Although the hydroxyl group has certain reductivity, it is not easy to be oxidized under conventional conditions. If it encounters a strong oxidant, the hydroxyl group may be oxidized to an aldehyde group, a carboxyl group, etc.
When storing, it should be placed in a cool and ventilated place, away from fire and heat sources, because although its chemical properties are relatively stable, it may cause chemical reactions such as hot topics and open flames, resulting in changes in properties.
What is the production method of 4-Hydroxybenzenesulfonic Acid Cas 98-67-9?
4-Hydroxybenzenesulfonic acid (Cas 98-67-9) has been prepared in various ways. First, using phenol as the starting material and co-heating with concentrated sulfuric acid can cause a sulfonation reaction. In this reaction, concentrated sulfuric acid is both a sulfonating agent and a dehydrating agent. Under specific temperature conditions, the hydrogen atom of the phenolic hydroxyl group is replaced by the sulfonic acid group, and then 4-hydroxybenzenesulfonic acid is generated.
When operating, careful temperature control is required. If the temperature is too low, the reaction is slow and the yield is poor; if the temperature is too high, side reactions, such as the formation of disulfonated products, are prone to occur. Generally speaking, the reaction temperature is maintained within a moderate range to ensure the efficient progress of the main reaction.
Furthermore, benzenesulfonic acid can also be used as a raw material and prepared by alkali fusion method. First, benzenesulfonic acid is co-melted with sodium hydroxide to generate sodium phenol, and then acidified to obtain 4-hydroxybenzenesulfonic acid. In this process, the alkali melting step is extremely critical, and the temperature and time must be strictly controlled, otherwise the purity and yield of the product will be affected.
In addition, 4-hydroxybenzenesulfonic acid can be obtained by diazotization, Sandmeier reaction and other series of steps. However, this path step is complicated, the cost is high, and it is rarely used in industrial production. In short, phenol sulfonation is the most commonly used method because of its easy availability of raw materials, relatively simple operation, and ability to meet certain production needs.
4-Hydroxybenzenesulfonic Acid Cas 98-67-9 in storage and transportation
For 4-hydroxybenzenesulfonic acid (Cas 98-67-9), all matters need to be treated with caution during storage and transportation.
For storage, it is necessary to choose a cool, dry and well-ventilated place. This is because if the substance is exposed to high temperature and humidity, it is afraid of qualitative change. High temperature can easily accelerate its chemical reaction, or cause decomposition, etc.; humidity may cause it to absorb moisture and affect its purity. And it needs to be kept away from fire and heat sources to prevent the risk of fire. Although the cover is not extremely flammable, it may be unexpectedly heated. It should also be stored separately from oxidizing agents and alkalis, and must not be mixed. Because 4-hydroxybenzenesulfonic acid has a certain chemical activity, it encounters with oxidants, or has a violent oxidation reaction; when mixed with alkalis, it is prone to neutralization and other reactions, resulting in its failure.
As for the transportation, the first heavy packaging is tight. The packaging materials used must be able to resist vibration, collision and friction to ensure that there is no leakage of substances during transportation. The loading and unloading process must be handled with care, and it is strictly forbidden to drop and heavy pressure. This may cause damage to the package due to severe vibration or heavy pressure, causing danger. Transportation vehicles should also be equipped with corresponding fire fighting equipment and leakage emergency treatment equipment, just in case. During transportation, you should follow the specified route to avoid densely populated areas and important places, so as to reduce the harm in the event of accidents. In this way, 4-hydroxybenzenesulfonic acid is safe during storage and transportation.