4-Aminobenzenesulphonic Acid

Lingxian Chemical

Specifications

HS Code	535392
Name	4 - Aminobenzenesulphonic Acid
Chemical Formula	C6H7NO3S
Molar Mass	173.19 g/mol
Appearance	White to off - white crystals or powder
Odor	Odorless
Solubility In Water	Soluble in hot water, sparingly soluble in cold water
Melting Point	288 - 290 °C
Pka Value	3.28
Density	1.485 g/cm³
Stability	Stable under normal conditions, but may decompose on heating

Packing & Storage

Packing	1 kg of 4 - Aminobenzenesulphonic Acid packaged in a resealable polybag.
Storage	4 - Aminobenzenesulphonic Acid should be stored in a cool, dry, well - ventilated area. Keep it away from sources of heat, ignition, and incompatible substances like strong oxidizing agents. Store in tightly sealed containers to prevent contact with moisture and air, which could affect its purity and quality over time.
Shipping	4 - Aminobenzenesulphonic Acid should be shipped in tightly - sealed containers, protected from heat and moisture. Follow all regulatory requirements for shipping chemicals to ensure safe transportation.

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General Information

Historical Development

The product of 4-aminobenzenesulfonic acid (4-Aminobenzenesulphonic Acid) has a considerable historical development. In the past, at the beginning of chemical research, the exploration of this substance was still shallow. However, with the passage of time, scholars have gradually deepened their research. At first, only a little knowledge of its fur, in terms of properties, uses and many other aspects, were lacking.
Then, after countless chemists worked tirelessly to clarify its characteristics. First, to master its basic chemical properties, and then to find a better preparation method, I worked hard. Experiments have been subject to twists and turns, either because of raw materials or because conditions are not in agreement, and the results are difficult to achieve.
However, although the road to scientific research is difficult, chemists are not discouraged. Finally, after repeated attempts, a more ideal preparation process was found, which greatly improved the purity and yield of 4-aminobenzenesulfonic acid products. Its uses have also expanded, emerging in many fields, adding a strong color to the development of chemistry.

Product Overview

4-Aminobenzenesulfonic acid is also a chemical product. Its color is white and often crystalline. Stable in nature, it can last for a long time in ordinary environments.
This product has a wide range of uses. In the dye industry, it is an essential material for making azo dyes. It can impart color to fabrics and make them fresh in color. In the field of medicine, it is also used, or as a pharmaceutical raw material, which is related to the effect of treating diseases.
And the method of its preparation, through specific chemical changes, with precise technology, appropriate raw materials, temperature control and time adjustment, can obtain pure 4-aminobenzenesulfonic acid. In terms of its physical properties and uses, it is of great value in industry, medicine, and other aspects.

Physical & Chemical Properties

4 - Aminobenzenesulphonic Acid, that is, p-aminobenzenesulfonic acid, has unique physical and chemical properties. This substance is white crystalline at room temperature, resembles jade chips, and has a fine texture. Its melting point is quite high, about 288 ° C, as if it can resist ordinary temperature. It is slightly soluble in cold water, just like a hermit's alienation from the world, but it can be well dissolved in hot water, as if it shows a different affinity in a suitable environment.
p-aminobenzenesulfonic acid is acidic and can react with bases to form corresponding salts, which is a corner of its chemical activity. And in its molecular structure, the amino group interacts with the sulfonic acid group, which affects the overall properties. Due to its unique properties, it has applications in dyes, medicine, and many other fields, serving as a foundation stone for the development of many industries.

Technical Specifications & Labeling

4 - Aminobenzenesulphonic Acid, sulfonic acid compounds are also important.
In manufacturing, it is necessary to precisely control the proportion of raw materials. The raw materials used must be of high quality, so as to ensure the quality of the product. The reverse parts are also maintained, such as the appropriate quality for a specific product, in order to promote the reverse production, to obtain high yield products.
Its quality, such as the name, type, content, etc. of the product. On the package, the warning is indispensable to inform the user of its sex and attention. In this way, 4 - Aminobenzenesulphonic Acid can be used safely and effectively in industrial applications, in order to meet the requirements of the standard of the product, and to meet the requirements of the product.

Preparation Method

The preparation of 4-aminobenzenesulfonic acid is related to the raw materials and production process, reaction steps and catalytic mechanism. The raw materials are often aniline and concentrated sulfuric acid. First, aniline is slowly injected into concentrated sulfuric acid. This step requires careful operation, because the reaction exothermic. After mixing the two, heat up to a specific temperature to allow it to fully react.
In the reaction step, aniline and sulfuric acid are first converted into salts, and then converted into 4-aminobenzenesulfonic acid through a series of conversions. The key lies in the control of temperature, time and raw material ratio. Too high or too low temperature, too long or too short time, and imbalance in ratio all affect the quality and yield of the product.
In terms of catalytic mechanism, sulfuric acid is not only used as a reactant, but also The acidic environment created by it is conducive to the reaction and promotes the transformation of the reaction according to the established path.
In this way, the product of 4-aminobenzenesulfonic acid can be obtained through fine operation and condition regulation.

Chemical Reactions & Modifications

The anti-modification of 4-aminobenzenesulfonic acid is very important in chemical research. Its reverse multi-terminal, such as neutralization, formation of phase. This is because the sulfonic acid group is acidic and can be used.
In addition, its amino group is also active, and can be substituted for the reverse. In terms of modification, it is often modified by chemical modification to improve its properties. Such as introducing different groups to change its solubility and qualitativeness.
Cleverly reverse, can make 4-aminobenzenesulfonic acid derived from a variety of useful compounds, which are useful in the fields of dyes, dyes, etc. Huajiaheng studied its new anti-chemical approach, seeking more modification methods, hoping to expand the new use of this compound, increase its useful value, and promote the prosperity of the phase.

Synonyms & Product Names

4 - Aminobenzenesulphonic Acid, that is, p-aminobenzenesulfonic acid. Its synonymous name is found in ancient books, or it is called p-aminobenzenesulfonic acid as aniline sulfonic acid. The trade name of the market is also named after its properties and uses.
p-aminobenzenesulfonic acid is an important chemical raw material. It is often seen in dyes, medicine and other industries. Because of its structure containing amino and sulfonic acid groups, its properties are unique. In the past, many parties studied its performance and application. Many products were based on p-aminobenzenesulfonic acid, and various categories were derived, each with its ability and suitable for different needs. Although its synonymous names are different, they all refer to this thing, which is of great significance in the field of chemical industry and promotes the prosperity of various industries.

Safety & Operational Standards

4-Aminobenzenesulfonic acid product safety and operation specifications
Fu 4-aminobenzenesulfonic acid is also an important chemical product. Its preparation and use of all ends, must comply with safety and operation specifications, in order to avoid disasters, ensure everyone's health, and maintain environmental peace.
At the beginning of preparation, all raw materials should be carefully selected. The product is of good quality and reduces the risk of side effects. Operators must wear protective equipment, such as clothes, hats, eyepieces, gloves, etc., to prevent the raw materials from touching the body, entering the eyes, hurting the skin, and damaging health.
The reaction device must be clean and intact, preventing leakage and leakage. Temperature control, pressure control, and time control, according to the predetermined process, do not cause disorder. If the temperature is high, it should be dramatic, or cause explosion; if the temperature is low, it should be slow, and the yield will drop. The regulation of pressure is also heavy, do not make it too much, and it will cause cracking and risk happening.
When the product is ready, when separating and purifying, choose the appropriate method. Filtration, steaming, and extraction methods should be selected according to nature. And it should be operated in a well-ventilated place to avoid harmful gas accumulation and endanger the human body.
When storing, it should be placed in a cool, dry place, away from fire and heat sources. Store separately from other things and avoid mixing. Strictly sealed to prevent moisture decomposition and deterioration.
When using this product, the operator should be aware of its nature and danger. Use it in a fume hood to prevent air from dispersing in the room. If you accidentally touch the body, flush it with water quickly, and seek medical attention for those who are serious. If it splashes into the eye, rush to flush it with water and seek medical treatment.
The principle of waste should be followed according to regulations. Collect it by classification, do not discard it indiscriminately. Or dispose of it so that it is harmless, or leave it to a professional to deal with it, and keep the environment from being polluted.
In short, the safety and operating practices of 4-aminobenzenesulfonic acid are related to human life and the environment, and should not be ignored. The operator must be careful, so that everything goes smoothly and is safe.

Application Area

4-Aminobenzenesulfonic acid is also a chemical substance. Its application field is quite wide. In the dye industry, it is often a key raw material, which can make colorful dyes, dye fabrics and bright colors, and last for a long time. In the field of medicine, it also has its use. It can be used as an intermediate for synthesizing many drugs, assisting in the development of medicine, and curing the suffering of patients. In the leather industry, it can be used for tanning leather to make leather tough and have a good texture. This substance plays an important role in many application fields, making great contributions to the development of industry and the improvement of people's livelihood. It is an indispensable and important substance in the field of chemistry.

Research & Development

4-Aminobenzenesulfonic acid is also an important chemical substance. I have been researching it for years, and looking at its development, I have made a lot of progress.
At the beginning, the method of making this acid was not good, and the yield was small, and the quality was not pure. Yu and his colleagues worked hard to study the recipe. After trial and error, new paths were obtained. Improve the process, select the right agent, control the temperature and pressure, so that the yield is greatly increased, and the quality is also good.
Today, 4-Aminobenzenesulfonic acid is widely used in various industries. The dyeing industry relies on it, and the quality is bright and strong; the pharmaceutical industry also uses it, as the basis for making good medicines. Its prospects are vast, and our generation should make unremitting efforts to explore its novelty, expand its uses, and hope to be able to add new achievements to the field of chemistry, so as to promote its development and prosperity, which can be used by the world and benefit people.

Toxicity Research

The chemical industry is related to people's livelihood, but the study of poisons in it should not be careless. In this sentence 4 - Aminobenzenesulphonic Acid, the study of its toxicity is very important.
Guanfu 4 - Aminobenzenesulphonic Acid, in chemical production, has a wide range of uses. However, its toxicity may endanger living things. After various experiments, observe its impact on living organisms. In animal experiments, if it enters the body, it may disturb the order of physiology and damage the ability of organs.
It is also tested in the environment, or persistent and difficult to eliminate, accumulating in water and soil, harming all things. Although it is useful in industry, the danger of toxicity cannot be prevented. Therefore, studying its toxicity, scrutinizing its harm in detail, and establishing regulations, so that when it is used in production, it is necessary to avoid harm and seek profit, ensure the safety of people's livelihood, and protect the peace of the environment, which is the way of chemical research.

Future Prospects

4-Aminobenzenesulfonic acid is also made by today's chemistry. Looking at its future development, there are many things to look forward to.
This material is used in the field of industry and has a wide range of uses. For example, the production of dyes can add its brilliance to the color and make the fabric colorful. In the future, it may be possible to use scientific and technological advancements to expand new dye categories to meet more diverse needs. In medicine, it also has potential success. Over time, it may be able to find new ways to treat diseases and become a good medicine for treating diseases.
And technology is changing with each passing day, and the preparation process should be optimized. Energy consumption can be reduced, output can be increased, resulting in cost reduction and efficiency improvement. In addition, its environmental protection properties are also expected to be strengthened, in line with the general trend of green development in the world.
Our generation of chemical researchers should study diligently, hoping that it will bloom in the future, add luster to human well-being, and display its extraordinary capabilities in various fields.

Frequently Asked Questions

What are the main uses of 4-Aminobenzenesulphonic Acid?

4-Aminobenzenesulfonic acid, its ancient name may be called "p-aminobenzenesulfonic acid". This substance has a wide range of uses and is an important dye intermediate in the printing and dyeing industry. Printing and dyeing is related to the color and appearance of clothing fabrics. 4-Aminobenzenesulfonic acid can participate in dye synthesis, making the dyed color gorgeous and lasting.
In the field of medicine, it also plays a key role. It can be used as a raw material for drug synthesis to help prepare a variety of drugs, which is related to treating diseases and saving people and maintaining health. For example, the manufacture of some anti-inflammatory and antibacterial drugs has its own shadow.
In chemical analysis, 4-aminobenzenesulfonic acid can be used In chemical experiments, industrial testing and other scenarios, through its reaction characteristics with other substances, it can accurately indicate the pH change of the solution, helping the analyst to grasp the reaction process and results.
Furthermore, in the electroplating industry, it can improve the performance of the plating solution. Make the metal coating more uniform and dense, and improve the beauty and durability of metal products, which is of great significance in industrial manufacturing. This is also the main use of 4-aminobenzenesulfonic acid.

What are the physical and chemical properties of 4-Aminobenzenesulphonic Acid?

4-Aminobenzenesulfonic acid, its physical properties are as follows:
This substance is in the state of white to gray-white crystalline powder at room temperature. Looking at its properties, the powder is fine and has no impurities visible to the naked eye. Its melting point is quite high, about 288 ° C. At this temperature, the solid 4-aminobenzenesulfonic acid gradually melts into a liquid state. This property is due to the size of its intermolecular forces and the stability of its structure.
When it comes to solubility, 4-aminobenzenesulfonic acid is slightly soluble in cold water, but in hot water, the amount of dissolution increases significantly. This is due to the increase in temperature, the thermal movement of molecules intensifies, and the interaction between water molecules and 4-aminobenzenesulfonic acid molecules enhances, promoting more solute molecules to And because it contains sulfonic acid groups and amino groups, it can be soluble in alkali solution, react with alkali to form corresponding salts, and exhibit good acid-base reaction characteristics.
4-aminobenzenesulfonic acid has moderate density and relatively compact texture, because its molecular arrangement is relatively regular and orderly. And its stability is good, under conventional temperature, humidity and light conditions, it is not prone to chemical changes, and can be stored for a long time. However, if it is exposed to strong acids, strong bases or strong oxidants, its chemical structure may be affected and changed. Overall, 4-aminobenzenesulfonic acid has unique physical properties and has important uses in many fields.

What are the precautions for 4-Aminobenzenesulphonic Acid in production?

4-Aminobenzenesulfonic acid, in production, there are many precautions that must be treated with caution.
The first thing to pay attention to is its chemical properties. This is an acidic organic compound that irritates the skin, eyes and respiratory tract. When operating, be sure to wear appropriate protective equipment, such as protective gloves, goggles and gas masks, to prevent direct contact with it or inhalation of its dust. Due to its acidic properties, during storage and use, it should be avoided to mix with alkaline substances to prevent severe chemical reactions and cause danger.
Second time, temperature and humidity are also critical. 4-Aminobenzenesulfonic acid is sensitive to temperature and humidity, and high temperature and high humidity environments can easily cause it to deteriorate or cause chemical reactions. Therefore, it is recommended to store in a cool, dry and well-ventilated place, away from heat and fire sources. Regularly check the storage conditions to ensure constant temperature and humidity to maintain its stable quality.
Furthermore, precise operation in the production process is indispensable. From the ratio of raw materials to the control of reaction conditions, established standards and procedures must be strictly followed. Precise control of reaction temperature, time and pH parameters can ensure product quality and production efficiency. Production equipment should also be regularly maintained and calibrated to ensure its normal operation and avoid product quality fluctuations or safety accidents caused by equipment failure.
Again, waste disposal should not be ignored. Waste generated during the production process, such as residues, packaging materials, etc., should be properly disposed of in accordance with environmental regulations. It must not be discarded at will to avoid polluting the environment. For wastewater containing 4-aminobenzenesulfonic acid, it needs to be effectively treated to meet discharge standards before it can be discharged.
In addition, personnel training is also an important part. Personnel involved in production must undergo professional training to be familiar with the properties, hazards and safe operation methods of 4-aminobenzenesulfonic acid. Training should be held regularly to strengthen employees' safety awareness and operation skills and ensure the safe and orderly operation of production operations.
In summary, in the production of 4-aminobenzenesulfonic acid, attention should be paid to chemical characteristics, temperature and humidity, precise operation, waste treatment and personnel training to ensure production safety, efficiency and high product quality.

How 4-Aminobenzenesulphonic Acid is Stored

4-Aminobenzenesulfonic acid, also known as p-aminobenzenesulfonic acid, this substance should be properly stored, depending on its storage method, it can be described in detail.
Its properties are relatively stable, and it may change in case of moisture or heat. Therefore, the first weight is moisture-proof, and a dry place needs to be selected. If it is in a humid environment, the water vapor will gradually soak in, or cause its properties to change, affecting its quality. It should be placed in a closed device to prevent the intrusion of external moisture and keep it pure.
This time it will avoid heat. Under high temperature, 4-aminobenzenesulfonic acid may undergo chemical changes, which will damage its original properties. It should be stored in a cool place, away from fire sources and heating devices. The indoor temperature should be controlled in a moderate area, so as not to overheat and cause it to deteri
Furthermore, 4-aminobenzenesulfonic acid may react with other substances, so it should be placed separately from foreign chemicals when stored. Materials such as strong oxidizing agents, strong alkalis and strong acids may react violently and cause danger when they come into contact with them. It is advisable to set up special counters, classify and store them, and mark them with clear names for easy access and management.
In addition, the storage place needs to be well connected. The circulating air can reduce the accumulation of odors, and in the event of accidental leakage, it can quickly disperse harmful gases and minimize the harm. And the storage place should be prepared with suitable fire and leakage emergency equipment, just in case.
In short, in order to properly store 4-aminobenzene sulfonic acid, it is necessary to choose a dry, cool and ventilated place, seal and store it, classify it, and prepare emergency equipment, so as to maintain its quality and avoid danger.

What are the synthetic methods of 4-Aminobenzenesulphonic Acid?

4-Aminobenzenesulfonic acid, also known as p-aminobenzenesulfonic acid, is synthesized as follows:
Synthesis method using aniline as raw material
Aniline is a common starting material for the synthesis of 4-aminobenzenesulfonic acid. The process of mixing aniline with concentrated sulfuric acid needs to be handled with caution because it is a strong exothermic reaction. After mixing, heating prompts a sulfonation reaction between the two. Specifically, under heating conditions, the sulfonic acid group (\ (- SO_ {3} H\)) in the sulfuric acid replaces the hydrogen atom at the amino para-position on the aniline ring, thereby generating 4-aminobenzenesulfonic acid. During the reaction, the reaction temperature and time If the temperature is too low, the reaction rate is slow and the yield is not high; if the temperature is too high, it is easy to form by-products, which affects the purity of the product. Usually, the reaction temperature is maintained in a specific range, and after the reaction has passed for several hours, the reaction system can reach the expected degree of reaction, and then follow-up treatment can be carried out. Through cooling, crystallization and other steps, the product is precipitated from the reaction mixture, and then filtered, washed, dried, etc., to obtain a pure 4-aminobenzene sulfonic acid product.
Synthesis method using nitrobenzene as raw material
This method first reduces nitrobenzene into aniline. The common reduction method is that under the action of metals (such as iron, tin, etc.) and acids (such as hydrochloric acid), nitro is reduced to amino groups to obtain aniline. Subsequently, the obtained aniline is reacted with concentrated sulfuric acid according to the above-mentioned sulfonation method using aniline as raw material, and then sulfonated by heating to generate 4-aminobenzenesulfonic acid. This route is relatively complicated and involves two main reactions of reduction and sulfonation, but it is also a feasible method under the condition that the raw material nitrobenzene is easy to obtain and the cost is suitable. The reaction conditions of each step also need to be strictly controlled in order to ensure the yield and purity of the product.
The above two methods for synthesizing 4-aminobenzenesulfonic acid need to be considered comprehensively according to the source of raw materials, cost, equipment conditions and many other factors in actual production, and the most suitable process route should be selected.