4-Aminobenzenesulfonic Acid

Lingxian Chemical

Specifications

HS Code	670631
Chemical Formula	C6H7NO3S
Molar Mass	173.19 g/mol
Appearance	white to light - tan crystals or powder
Odor	odorless
Melting Point	288 °C
Solubility In Water	slightly soluble in cold water, more soluble in hot water
Solubility In Organic Solvents	insoluble in most organic solvents
Acidity Pka	3.23
Stability	stable under normal conditions
Hazard Class	Irritant

Packing & Storage

Packing	500 - gram bottle of 4 - Aminobenzenesulfonic Acid, well - sealed for safe storage.
Storage	4 - Aminobenzenesulfonic acid should be stored in a cool, dry, well - ventilated area. Keep it away from heat sources, open flames, and oxidizing agents. Store in tightly closed containers to prevent moisture absorption and contamination. It's crucial to segregate it from incompatible substances to avoid potential chemical reactions.
Shipping	4 - Aminobenzenesulfonic Acid should be shipped in tightly - sealed containers, protected from moisture and heat. It must comply with hazardous chemical shipping regulations, ensuring safe transport to prevent any spills or contamination.

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General Information

Historical Development

4-Aminobenzenesulfonic acid, an ancient chemical product, has been developed over the years. In the past, chemistry was just emerging, and people made unremitting efforts to explore substances. At some point, some wise people paid attention to the related reactions of this substance. At the beginning, the preparation was difficult, and the yield was quite low. However, the wise men studied it more and more, and gradually understood the method of its synthesis. With the passage of time, the process has been perfected day by day.
The simple utensils used in the past have been replaced by exquisite instruments. In the past, the cognition was shallow, but today we have a deep understanding of its properties and uses. In many fields such as printing and dyeing, medicine, etc., 4-Aminobenzenesulfonic acid has played an important role. This is the result of diligent research by chemists of all dynasties, witnessing the progress of

Product Overview

4-Aminobenzenesulfonic acid is also an important product for chemical processing. Its color is white, like a powder, soluble in water and slightly soluble in alcohol.
This product has a wide range of uses. In the production of dyes, it can be the key material to make the color bright and firm. In the field of medicine, it also has its function, or it may be the basis for synthesis, helping health.
The preparation method is mostly made of benzenesulfonic acid by nitrification and reduction. However, when preparing, it is necessary to abide by the procedures, control the temperature and the amount of agent, and ensure its purity.
Guanfu 4-aminobenzene sulfonic acid, although it is a small matter, it has a great effect in the fields of engineering, medicine and so on. It is a treasure of chemical products. We will wait for our generation to explore its wonders and develop its capabilities. It will be used by the world and benefit people.

Physical & Chemical Properties

4-Aminobenzenesulfonic acid, its physical properties are the key. Looking at its shape, it is often white crystalline and pure like jade chips. The melting point is quite high, about 288 ° C, just like a hard stone that is refractory, which is caused by the strong intermolecular force.
In terms of its solubility, it is soluble in hot water, just like a fish in water, and slightly soluble in cold water, just like ice melts slightly under warm sunlight. It is acidic and can react with alkali substances such as sodium hydroxide, just like yin and yang.
This substance is widely used in the chemical industry. In the synthesis of dyes, it is like a masterpiece, painting in brilliant colors; in the preparation of medicine, it is also an important cornerstone, escorting health. Only by knowing its physical and chemical properties can we make good use of it to maximize its effectiveness and benefit the world.

Technical Specifications & Labeling

4-Aminobenzenesulfonic acid is an important chemical substance. Its process specifications and labels (product parameters) are related to many aspects of production and application.
In terms of process specifications, to make this product, a rigorous process is required. The selection of raw materials must be pure and refined, and the ratio must be accurate. Reaction conditions, such as temperature, pressure, and reaction time, must be strictly controlled. If the temperature is too high, the product may be impure; if the time is insufficient, the reaction will be incomplete.
When it comes to labels (product parameters), their appearance should be in a specific color state with uniform particle size. Purity is a crucial item, and high purity can ensure its effectiveness in various fields. Impurity content must be strictly controlled to avoid adverse effects. This is the key to the 4-aminobenzene sulfonic acid process specification and identification (product parameters), which is related to the quality and cannot be ignored.

Preparation Method

The method of making 4 - Aminobenzenesulfonic Acid is the first raw material and production process. The raw materials are often aniline, etc., in an appropriate proportion. In the production process, the reaction step is crucial. First, aniline and sulfuric acid are heated together. This step requires moderate temperature control to promote the proper reaction of the two to obtain aniline sulfate.
Then, raise the temperature to make it further sulfonated. After this reaction step, 4 - Aminobenzenesulfonic Acid crude can be obtained.
The refining process after
is related to the purity of the product. Often recrystallization is used to remove impurities and purify the product. In this process, the conditions should be precisely regulated according to the characteristics of the product, so that the purification mechanism can run smoothly to obtain high-quality 4-Aminobenzenesulfonic Acid products.

Chemical Reactions & Modifications

4-Aminobenzenesulfonic acid is a chemical substance. Its chemical reaction and modification are related to many things. In the past, the reaction mechanism is quite complicated. In the reaction, the change of the group is often involved, and the interaction between the sulfonic acid group and the amino group affects the characteristics of the product.
To change its properties, various methods are often used. Change the reaction conditions, the genus of temperature and pressure, or the addition of other substances as catalysis. In this way, the quality of the product can be better and it can be used more widely.
Looking at the change, it can be seen that the chemical reaction is very delicate. After continuous research and development, we can understand its rationale, make good use of it, and add brilliance to many fields, so that this chemical product can be used to the best of its ability in industry and scientific research.

Synonyms & Product Names

4 - Aminobenzenesulfonic Acid, that is, p-aminobenzenesulfonic acid, is very important in the chemical industry. There are many synonyms, and in the industry, it is also often called sulfamic acid. From a commercial perspective, many trade names are also derived around it.
p-aminobenzenesulfonic acid has significant chemical properties and plays a significant role in the field of dye synthesis. With its structural properties, it can be used as a key intermediate to assist in the construction of dye molecules. In the field of pharmaceutical preparation, it also has a key position. Because of its specific chemical activity, it can participate in a variety of drug synthesis reactions, laying the foundation for the creation of new drugs.
In commercial circulation, it is shown in the market under different commodity names, but its essence is p-aminobenzenesulfonic acid. The complexity of its synonyms and trade names reflects its wide application and deep influence in the chemical industry and related industries.

Safety & Operational Standards

4-Aminobenzenesulfonic acid is a commonly used chemical product. It is related to its safety and operation specifications, and needs to be paid attention to in detail.
During production and preparation, workers should wear protective clothing, goggles and masks to prevent its powder from entering the eyes and inhaling into the mouth and nose. Because of its certain irritation, if you accidentally touch the skin, rinse it with a lot of water quickly; if it enters the eyes, you need to seek medical attention immediately. Operate in a well-ventilated place to avoid dust filling the space.
When storing, it should be placed in a cool, dry place, away from fire and heat sources, and separated from oxidants, acids and alkalis. Do not mix storage. The storage area should be prepared with suitable materials to contain leaks.
During transportation, ensure that the container does not leak, collapse, fall or damage. It is strictly forbidden to mix and transport with oxidants, acids, alkalis, edible chemicals, etc. During transportation, the transportation vehicle should be equipped with the corresponding variety and quantity of fire protection equipment and leakage emergency treatment equipment.
When using, measure accurately and avoid contact with incompatible substances according to the operating procedures. After use, properly clean up the use site to prevent residual environmental pollution and personal hazards.
All safety and operation specifications involving 4-aminobenzenesulfonic acid must be strictly practiced to ensure personnel safety and production.

Application Area

4-Aminobenzenesulfonic acid is useful in various fields. In the dyeing and weaving industry, it is an essential material for making azo dyes. With its coupling reaction with other compounds, it becomes a bright and strong dye, making the color of the fabric last for a long time.
In the field of medicine, it also has functions. It is a raw material for the preparation of sulfonamides. Such drugs have good antibacterial effect, can treat a variety of infections and protect people's health.
Furthermore, in the manufacture of leather, it can be used to assist in the tanning process. Make leather flexible and durable, and improve the quality of leather.
In analytical chemistry, it can be used as a raw material for acid-base indicators. Its characteristics make the solution discoloration acute, and help the analyst to accurately determine the end point of the reaction. From this point of view, 4-aminobenzene sulfonic acid is widely used in many industries.

Research & Development

In recent years, I have focused on the research of 4 - Aminobenzenesulfonic Acid. This substance has a wide range of uses and plays an important role in dyes, medicine and other industries.
I began to study its synthesis method, and strive to improve the process, hoping to improve the yield and reduce costs. At first, the old method was difficult and expensive, and the raw material consumption was quite huge. Then I went through the classics, referred to the opinions of various families, and went to many workshops to investigate in person, and finally got an improved plan. With the new method, the yield has increased significantly, and the utilization rate of raw materials has increased greatly.
I dare not slack off when studying its properties. Examine its chemical properties and physical properties in detail to see how it changes in different environments. This is the foundation for expanding its application field. I believe that through unremitting research, 4-Aminobenzenesulfonic Acid will be able to shine in more fields, promote the development of the industry, and be used by the world.

Toxicity Research

4-Aminobenzenesulfonic acid is also a chemical substance. For toxicological research, it is important to investigate its toxicity and explore it.
This substance dissolves in water, and it can be caused by ingestion, or mouth food, or skin. However, in the image of the substance, dosing 4-aminobenzenesulfonic acid can cause the opposite. It may have a problem, with little activity, and even life-threatening.
The reason for its toxicity, or the new generation of dry organisms, its biochemical pathway. Or the membrane of the cell, which harms its normal function. However, more research is needed to understand it.
Therefore, the toxicity of 4-aminobenzenesulfonic acid cannot be ignored. We study it, hoping to know its properties, prevent its harm, and ensure the safety of the product.

Future Prospects

4-Aminobenzenesulfonic acid is also made by today's chemistry. Looking at its material, it has stable purity and wide use. It is indispensable in dyeing, weaving and medicine.
Our generation researched it, looking forward to the future, its development is not limited. In the dyeing and weaving industry, or to make its color brighter and washable more than strong, this requires 4-aminobenzenesulfonic acid to be further studied in the principle of fineness, so that the dye can last for a long time. The way of medicine, I hope it will have more progress in the synthesis of new agents, or be the foundation of anti-disease medicines, saving the pain.
And technology is improving, the preparation method should be simplified and refined, the cost is gradually decreasing, and the production capacity is increasing. In the future, 4-aminobenzene sulfonic acid will be able to shine in all industries, contribute to the progress of the world, and become the grand scene that our generation has been looking forward to.

Frequently Asked Questions

What are the main uses of 4-Aminobenzenesulfonic Acid?

4-Aminobenzenesulfonic acid, also known as p-aminobenzenesulfonic acid, is widely used.
In the dye industry, it is a key intermediate. It can be used to synthesize a variety of azo dyes, such as direct dyes, acid dyes, reactive dyes, etc. By coupling reaction with different diazonium salts, dyes with various colors and properties can be prepared to meet the diverse needs of textile, printing and dyeing industries for color fastness, brightness and application performance of dyes.
In the field of medicine, it also has important uses. It is a raw material for the synthesis of many drugs, such as some sulfonamides, which have antibacterial and anti-inflammatory effects and can be used to treat a variety of bacterial infections. 4-Aminobenzenesulfonic acid provides a key structural fragment in drug synthesis, and through a series of chemical transformations, imparts specific pharmacological activity and therapeutic efficacy to the drug.
In analytical chemistry, 4-aminobenzenesulfonic acid is often used as a raw material for acid-base indicators. Because of its certain acid-base properties, it can present different colors through structural changes to indicate changes in the pH of solutions, helping researchers to accurately determine the endpoint of chemical reactions and ensure the accuracy and reliability of analytical results.
In addition, 4-aminobenzenesulfonic acid is also used in surfactants, photosensitive materials and other industries. In the synthesis of surfactants, it participates in the construction of molecular structures with specific properties to improve the surface activity, emulsification, dispersion and other properties of the product; in the manufacture of photosensitive materials, it may participate in the construction of photosensitive layer components, which affects the photosensitive properties and imaging quality of photosensitive materials. In short, 4-aminobenzenesulfonic acid plays an important role in many industrial and scientific research fields, and plays a key role in promoting the development of various industries.

What are the physical properties of 4-Aminobenzenesulfonic Acid?

4-Aminobenzenesulfonic acid, also known as p-aminobenzenesulfonic acid, is a kind of organic compound. It has the following physical properties:
In appearance, it is a white to off-white crystalline powder under normal conditions, with fine and uniform texture. This form is convenient for storage, transportation and subsequent processing.
The melting point is quite high, about 288 ° C. The high melting point indicates that the intermolecular force is strong, the structure is relatively stable, and the phase state transition occurs at higher temperatures. This property is of great significance in industrial processes or experimental operations involving high temperature treatment, which can ensure that its solid-state properties are maintained within a certain temperature range. In terms of solubility, it is slightly soluble in cold water and slightly more soluble in hot water. It is soluble in basic solutions such as ammonia and sodium hydroxide, but extremely insoluble in organic solvents such as ethanol and ether. This difference in solubility stems from the strong polarity of the sulfonic acid group in its molecular structure and the certain polarity of the amino group. Sulfonic acid groups easily form hydrogen bonds with water molecules, but due to the hydrophobicity of the benzene ring, the solubility in cold water is limited; the energy provided by hot water prompts the molecular movement to intensify, increasing the chance of contact with water molecules, and the solubility is improved. Alkaline solutions can react with sulfonic acid groups or amino groups, thereby increasing their solubility; the non-polar structure of organic solvents does not match the polar structure of 4-aminobenzenesulfonic acid, resulting in insolubility.
Odor, its own smell is weak, which can reduce the trouble caused by odor in many application scenarios. Whether it is used in industrial production or as an experimental reagent, it will not interfere with the production environment or experimental operation due to strong odor.
The density is moderate, and the specific value will vary slightly due to factors such as purity. The appropriate density plays an important role in the measurement, mixing of materials and the quality control of related products, ensuring the accurate ratio in the production process and the stability of product quality.
4-Aminobenzenesulfonic acid These physical properties are interrelated, and together determine its application mode and scope in many fields such as chemical industry, medicine, dyes, etc., which is of great significance to the development of related industries.

What are the chemical properties of 4-Aminobenzenesulfonic Acid?

4-Aminobenzenesulfonic acid, which is white in color and has needle-like or flake-like crystals. It is quite stable at room temperature and soluble in water, but difficult to dissolve in ethanol and ether.
This substance has the characteristics of an acid. Because its sulfonic acid group can dissociate hydrogen ions, it can neutralize and react with bases to form corresponding salts. For example, by reacting with sodium hydroxide, 4-aminobenzenesulfonic acid can be obtained.
The presence of amino groups in 4-aminobenzenesulfonic acid makes it also have the properties of a certain base and can react with acids. The amino group is the power supply group, which has an impact on the electron cloud distribution of the benzene ring, increasing the density of the electron cloud in the adjacent and para-position of the benzene ring, so electrophilic substitution reactions can occur, such as halogenation, nitrification, sulfonation, etc., and the substitution mostly occurs in the para-position of the amino group. Due to the large volume of the sulfonic acid group, the ortho-steric resistance is large.
It is also reductive, and the amino group can be oxidized by the oxidant, resulting in changes in the structure and properties. In the dye industry, 4-aminobenzenesulfonic acid is often an important intermediate. It can produce many dyes through a series of reactions. With the reactivity of the amino group and the sulfonic acid group in its structure, it participates in the construction of the color system of

What is the production method of 4-Aminobenzenesulfonic Acid?

4-Aminobenzenesulfonic acid, also known as p-aminobenzenesulfonic acid, is prepared by two common methods.
One is to use aniline as the starting material and prepare it by sulfonation reaction. In the reaction kettle, put an appropriate amount of aniline and slowly add concentrated sulfuric acid. This process requires strict temperature supervision. At the beginning, the temperature should be controlled at 180-200 ° C, and concentrated sulfuric acid and aniline can undergo electrophilic substitution reaction. The amino group of aniline is an ortho-para-site group. Due to the steric resistance and electronic effects, the sulfonic acid group is mostly introduced into the amino para-site to produce 4-aminobenzenesulfonic acid. After the reaction, the pure product can be obtained through cooling, crystallization, filtration, washing and other processes. The key to this reaction lies in the precise regulation of temperature. If the temperature is too high, it is easy to cause side reactions to occur, resulting in meta-or multi-sulfonation products; if the temperature is too low, the reaction rate will be slow and time-consuming.
The second is to use nitrobenzene as raw material, first sulfonate to obtain m-nitrobenzene sulfonic acid, and then reduce it to obtain 4-aminobenzene sulfonic acid. First, the nitrobenzene is co-placed in the reactor with fuming sulfuric acid, and at an appropriate temperature, the nitrobenzene is sulfonated. The nitro group of m-nitrobenzene sulfonic acid is reduced to an amino group to obtain 4-aminobenzene sulfonic acid. In this path, the reduction step is crucial, and the amount of reducing agent and reaction conditions will affect the purity and yield of the product. When reducing iron powder, it is necessary to pay attention to the acidity, temperature and stirring rate of the reaction system to ensure the smooth progress of the reduction reaction and the good quality of the product.

4-Aminobenzenesulfonic Acid in storage and transportation

4-Aminobenzenesulfonic acid is an important organic compound. When storing and transporting, many points need careful attention.
In terms of storage, the first environment is dry. Because of its certain water absorption, if the environment is humid, it is easy to cause moisture and agglomeration, which will affect the quality and use. Therefore, it should be placed in a dry warehouse, away from water sources and moisture.
Secondly, it is necessary to pay attention to the appropriate temperature. Excessive temperature may cause changes in its chemical properties, or even cause it to decompose. Generally speaking, it should be stored in a cool place, and the temperature should not exceed 30 ° C.
Furthermore, ensure that the storage environment is well ventilated. 4-Aminobenzenesulfonic acid or volatilizes a special odor. Good ventilation can avoid odor accumulation, ensure the air quality of the storage space, and help prevent potential hazards caused by gas accumulation.
And it needs to be stored separately from oxidants, acids, alkalis and other substances. Because of its active chemical nature, contact with these substances may cause severe chemical reactions, resulting in serious consequences such as fire and explosion.
When transporting, the packaging must be firm. Suitable packaging materials should be used to ensure that it is not damaged and leaked due to vibration, collision during transportation.
The transportation vehicle should also be kept clean and dry to avoid the reaction of other residual chemical substances with it.
The transportation process should avoid high temperature periods and road sections to prevent transportation safety from being endangered due to excessive temperature.
The escort personnel also need to have professional knowledge and be familiar with the characteristics of 4-aminobenzenesulfonic acid and emergency treatment methods, so that they can respond quickly and properly in case of emergencies to ensure the safety of storage and transportation.