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P-Methylbenzenesulfonic Acid

Specifications

HS Code	967968
Chemical Formula	C7H8O3S
Molar Mass	172.202 g/mol
Appearance	White to off - white crystalline powder
Odor	Odorless (usually)
Solubility In Water	Soluble
Melting Point	103 - 105 °C
Boiling Point	Decomposes before boiling
Acidity	Strongly acidic
Pka Value	Around -2.8
Density	1.24 g/cm³ (approximate for solid state)

As an accredited P-Methylbenzenesulfonic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

Packing & Storage

Packing	1 kg of P - Methylbenzenesulfonic Acid packaged in a sealed, corrosion - resistant bag.
Storage	P - Methylbenzenesulfonic 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 closed containers to prevent moisture absorption, which could affect its purity and properties. Ensure storage areas are free from potential contaminants.
Shipping	P - Methylbenzenesulfonic Acid should be shipped in tightly - sealed, corrosion - resistant containers. It must be labeled clearly as a chemical. During transit, ensure proper ventilation and protection from heat and moisture to maintain its integrity.

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General Information

Historical Development

"The History of P-Methylbenzenesulfonic Acid"
P-Methylbenzenesulfonic Acid, the thing of transformation. Its beginning is unknown to those who have not known it. In modern times, the refinement of the chemical industry has been refined, and those who have studied it have been studied. At the beginning, to explore its properties, analyze its performance, and work hard.
First of all, if you want to obtain this acid, the amount of the method is too small. However, those who have transformed the chemical industry have been studying it endlessly, and they have developed a new method. In the past month, it will be clear how good it is to take it. From the raw materials of the chemical industry, it can be obtained.
Its use has not been used since the beginning. People have observed its unique properties, and in the chemical industry, its performance has been improved. Either to help the speed of the reaction, or to catalyze the movement, which is important for engineering and scientific research, and the amount is also increasing. P-Methylbenzenesulfonic the development of Acid is the result of unremitting exploration in the chemical industry.

Product Overview

"Overview of P - Methylbenzenesulfonic Acid Products"
P - Methylbenzenesulfonic Acid, Chinese name p-toluenesulfonic acid, is an important reagent commonly used in organic synthesis. It is a colorless needle or powder crystal with strong acidity.
This product is widely used in many fields. In organic synthesis, it is often used as a catalyst to effectively accelerate many reaction processes, such as esterification reaction. Due to its acidic properties, it can promote the reaction to proceed efficiently in the desired direction. And compared with other strong acids, it has good solubility, mild reaction conditions and high selectivity.
In industrial production, p-toluenesulfonic acid also plays a key role. In the manufacture of certain fine chemicals, it can adjust the reaction path by virtue of its unique properties to improve the purity and yield of the product.
Preparation of this product is mostly obtained by specific chemical processes, and the corresponding raw materials are reacted under suitable conditions. When storing and using, pay attention to its acidity, and take protective measures to avoid contact with alkaline substances and substances that are easy to react with acids.

Physical & Chemical Properties

The physicochemical properties of "P-Methylbenzenesulfonic Acid" (p-toluenesulfonic acid) have been carefully investigated. It is a white needle-like or powdery crystal with strong acidity. The melting point is about 104-106 ° C, and the boiling point is 140 ° C (2.67kPa).
is easily soluble in water, alcohol and ether, and is widely used in organic synthesis, often as a catalyst. Its acidity is due to the strong ionization ability of sulfonic acid groups. And its chemical properties are relatively stable, and it is not easy to decompose under normal conditions. Because of its acidic properties, it can neutralize with bases to form corresponding salts. And because of the benzene ring structure, it has certain aromatic properties. It can participate in many electrophilic substitution reactions, which are its unique physicochemical properties.

Technical Specifications & Labeling

"Process Specification and Identification of P-Methylbenzenesulfonic Acid (Product Parameters) "
P-Methylbenzenesulfonic Acid is an important product in the chemical industry. Its process specification is related to the quality. When making, the raw materials must be pure and the ratio must be refined. The temperature and time of the reaction must be strictly controlled. If the raw materials are mixed, they should be uniform and intact; the reaction device should also be clean and intact to prevent impurities from entering and damaging its quality.
As for the identification, the product parameters should be clearly stated. The amount of content and the geometry of purity should be marked in detail. On the packaging, it should be clearly displayed so that the user can see it at a glance. In this way, it can be guaranteed to be used in industry, safe and efficient, and to comply with process specifications and labels, it can also be used in chemical engineering.

Preparation Method

The method of making P - Methylbenzenesulfonic Acid is essential for raw materials and production process. Toluene and concentrated sulfuric acid are used as raw materials, and the two are added to the reactor according to a certain ratio. The temperature is raised to an appropriate temperature, and the two react.
The reaction step is to co-heat toluene with concentrated sulfuric acid, and the sulfonic acid group replaces the methyl ortho or para-hydrogen of toluene to obtain P - Methylbenzenesulfonic Acid crude product.
Refined, by neutralization, separation, crystallization, etc. The crude product is neutralized by adding alkali, adjusting the pH value, and then separating and removing impurities. Then cool down and crystallize to obtain pure P - Methylbenzenesulfonic Acid.
In this process, temperature control, time control and raw material ratio are all key. Precise grasp can improve yield and purity, so that production is orderly. This is a rough method for the preparation of P-Methylbenzenesulfonic Acid.

Chemical Reactions & Modifications

In this research, the reaction of P - Methylbenzenesulfonic Acid, which is a sulfonic acid compound, acidic, can be used as a catalyst.
The reaction of its reaction, often the esterification reaction of alcohol. If ethanol meets, under the appropriate conditions, the reaction of the sulfonic acid group to the sulfonic acid group, the water escapes, and the lower part of the phase is formed. In this reaction, P - Methylbenzenesulfonic Acid exhibits its catalytic energy, reduces the activation energy required for reaction, and quickly reverses the process.
To the reaction, because it contains sulfonic acid groups, it can partially react in water, and it is acidic. This acidic nature makes it capable of reaction, such as gold oxides. And it is qualitative, usually it is not easy to decompose under low temperature, but it encounters special conditions such as oxidation, or because of low temperature, the chemical properties may also be low. Research on its anti-chemical properties is of great significance in the fields of chemical synthesis and other fields.

Synonyms & Product Names

P-Methylbenzenesulfonic Acid, it is also a chemical product. It has the same trade name and can be investigated.
P-Methylbenzenesulfonic Acid is also toluenesulfonic acid, which is the same as it is often used. It is sold in the market, or under the name of "toluenesulfonic acid", which is known in chemical transactions.
It is also named after its characteristics, because it has a sulfonic acid group and has a methyl group at the position, and it is also named by a similar name, all of which refer to this thing.
Merchants sell it, or use toluenesulfonic acid, or in business or publicity, and take another trade name. However, to investigate its origin, all of them are P-Methylbenzenesulfonic Acid. When we study this thing, we must observe its identity and trade name, so that we can clarify the market, so as to facilitate research and transaction.

Safety & Operational Standards

"P-Methylbenzenesulfonic Acid Product Safety and Operation Specifications"
P-methylbenzenesulfonic acid is a commonly used chemical product. Its properties are strong acid, and it is widely used in chemical synthesis. However, it also contains risks, which are related to safety and operation standards, and should not be careless.
In terms of safety, this product is corrosive and will cause damage if it touches the skin and eyes. Therefore, when handling, protective equipment is indispensable. The operator wears protective gloves and goggles in front of corrosion-resistant clothing to prevent splashing on the body. If you accidentally touch it, rinse it with plenty of water quickly, and seek medical attention urgently in serious cases.
And its volatile gases in the air are also harmful to health. In the place of operation, it must be well ventilated, or ventilation equipment must be installed to drain harmful gases and avoid inhalation and disease.
As for the operating specifications, when weighing, use a precise device to measure accurately according to the square, and there should be no deviation. When dissolving, it is advisable to slowly add the solvent and stir evenly, but not vice versa, to prevent violent reactions.
Storage is also important. It should be placed in a cool, dry place, away from fire and heat sources, and stored separately with alkalis and oxidants to avoid reaction. Packaging is sealed to prevent leakage.
When handling, handle it with care and do not damage the container. If there is a leak, quickly isolate the scene and evacuate unrelated people. Small leaks should be cleaned by adsorption of sand, vermiculite, etc.; large leaks should be contained and collected according to regulations.
In short, the safety and operation standards of P-methylbenzenesulfonic acid are related to the health of the operator and the smooth production. Practitioners should be familiar with the heart and proceed with caution to ensure safety.

Application Area

In the field of chemical industry, there is a substance called p-toluenesulfonic acid (P-Methylbenzenesulfonic Acid). This substance has a wide range of uses and is often a good catalyst in organic synthesis. In the esterification reaction, it can promote its rapid operation, so that the acid and alcohol phase combine, the effect of ester production is greatly increased, and the reaction conditions are relatively easy, without severe temperature and pressure.
In some polymerization processes, it can also play a strange role, adjusting the rate of reaction and controlling the structure of the product. In the dyeing and weaving industry, it can be used to help the fixation of dyes, and the color of fabrics is brighter and stronger, and it will not fade for a long time. The pharmaceutical industry is also involved. It is involved in the steps of drug synthesis, helps the reaction, and contributes to the manufacture of good medicines. Its application in many fields is really a treasure of the chemical industry, benefiting the common people, and it is indispensable.

Research & Development

Today there is a product called p-toluenesulfonic acid (P-Methylbenzenesulfonic Acid). As a chemical researcher, I have a lot to explore in the way of research and development.
p-toluenesulfonic acid is active and in the field of organic synthesis, it is often a catalyst with significant effect. It can promote the progress of many reactions, increase the rate and yield. In the past, studies have focused on its catalytic mechanism, and strive to clarify its reasons and make good use of it.
However, the road of development is not smooth. To expand its application, it is necessary to solve the problems of impurity removal and stability improvement. Today, we should inherit the wisdom of our predecessors, study relentlessly, and seek innovative methods, hoping to expand its use in chemical, pharmaceutical and other industries, and develop greater capabilities for research and development.

Toxicity Research

In the chemical industry, there are various categories and material properties, which are related to people's livelihood. Today, in terms of P-Methylbenzenesulfonic Acid, its toxicity research is quite important.
p-toluenesulfonic acid, the appearance may be white crystalline. In the toxicity investigation, it can be known that it has a certain irritation. If it accidentally touches the skin, or causes local discomfort, redness and swelling; if it enters the eyes, it is particularly harmful, which can damage the eye tissue. And inhalation of its dust may also affect the respiratory tract, causing cough, asthma, etc.
However, it is also widely used in industry, so the study of toxicity aims to clarify its harm and formulate reasonable protective measures. Practitioners should strictly abide by the procedures and use appropriate protective equipment, so as to ensure complete security and avoid toxic hazards, so that this product can be used by the industry without harming people.

Future Prospects

In the future, science and technology have flourished, and the research of materials has been new and new. Today, there are P-Methylbenzenesulfonic Acid, which is of great use. Its manufacturing can be catalyzed, so that the general anti-profit can be achieved, the efficiency can be improved, and the efficiency can be improved.
In chemical synthesis, it is also an important position. It is possible to assist in the field of home-made new compounds, research, and material innovation. Or it can be used to create special effects, which can be used to heal the disease; or it can create strange materials, which can be used in the cutting-edge fields such as aerospace and electronics.
In addition, P-Methylbenzenesulfonic Acid has not yet been developed, and its strength will be able to improve people's well-being, add color, and lead me to a new realm.

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As a trusted P-Methylbenzenesulfonic Acid manufacturer, we deliver: Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements. Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery. Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.

Frequently Asked Questions

As a leading P-Methylbenzenesulfonic Acid supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.

What are the main uses of P-Methylbenzenesulfonic Acid?

P-toluenesulfonic acid is an important reagent commonly used in organic synthesis. Its main uses are as follows:
First, it is a catalyst for esterification reactions. In many organic esterification reactions, p-toluenesulfonic acid can effectively catalyze the reaction of carboxylic acids and alcohols to form corresponding ester compounds. During this reaction process, it can increase the reaction rate, reduce the activation energy required for the reaction, and make the reaction easier to proceed. For example, acetic acid and ethanol can successfully form ethyl acetate under the catalysis of p-toluenesulfonic acid, which is a commonly used method in industrial production and is widely used in flavors, solvents and other industries.
Second, it is used for alkylation reactions. In the alkylation reaction of aromatic hydrocarbons, p-toluenesulfonic acid can be used as a catalyst to promote the reaction of aromatic hydrocarbons with alkylation reagents such as halogenated hydrocarbons or olefins, and introduce alkyl groups into the aromatic ring. For example, benzene and chloromethane can form toluene under the catalysis of p-toluenesulfonic acid, which is of great significance for the construction of carbon-carbon bonds in organic synthesis, providing a way for the synthesis of many organic compounds with specific structures and functions.
Third, it is also used in the field of polymerization. In some polymerization reactions, such as the synthesis of phenolic resins, p-toluenesulfonic acid can be used as a curing agent or catalyst. It can speed up the curing speed of phenolic resins, improve the degree of crosslinking and mechanical properties of resins, and then improve the quality and
Fourth, it plays a significant role in pharmaceutical synthesis. In many drug synthesis processes, p-toluenesulfonic acid can be used as a catalyst or reaction reagent to participate in the construction of complex drug molecules. For example, in the synthesis of some drug intermediates containing specific functional groups, the catalytic effect of p-toluenesulfonic acid can ensure the selectivity and yield of the reaction, providing strong support for drug development and production.

What are the physical properties of P-Methylbenzenesulfonic Acid?

P-toluenesulfonic acid is an organic compound and its physical properties are quite unique. Looking at its appearance, it is often a white needle-like or powdery solid with a fine texture. This substance is quite stable at room temperature and pressure, and it is also dangerous in case of high temperature or open flame.
When it comes to solubility, p-toluenesulfonic acid is easily soluble in water, which makes it very convenient for reactions or applications in many aqueous systems. Not only that, but it also shows good solubility in organic solvents such as alcohols and ethers, which lays the foundation for its wide application in the field of organic synthesis.
Furthermore, the melting point of p-toluenesulfonic acid is about 103-105 ° C. This melting point value makes it possible to realize the transformation of solid and liquid states under specific temperature conditions, which is of great significance in some process operations that require precise temperature control.
In addition, p-toluenesulfonic acid has certain hygroscopicity. In a humid environment, it is easy to absorb moisture in the air. This characteristic requires special attention during storage and use, otherwise it may affect its quality and performance. The physical properties of p-toluenesulfonic acid, such as its color state, solubility, melting point, and hygroscopicity, make it unique and valuable in many fields such as chemical industry, pharmacy, and materials. It often plays a key role as an efficient catalyst in organic synthesis reactions.

P-Methylbenzenesulfonic Acid need to pay attention to when storing

P-methylbenzenesulfonic acid is also an organic compound. When hiding, pay attention to many things.
First, it must be stored in a cool place. This is because of its liveliness, if it is exposed to high temperature, it may cause chemical reactions to change, or there is a risk of decomposition and deterioration. Under high temperature, the molecular movement intensifies, and its chemical stability is easily lost. If it is placed in a hot summer, it may be damaged in a hot place.
Second, it must be kept in a dry environment. P-methylbenzenesulfonic acid encounters water, or reacts such as hydrolysis, causing its purity and properties to change. If it is placed in a humid place, water vapor will invade, such as jade dust, and the quality will not be as good as before.
Third, it should be stored in a sealed device. First, to prevent its volatilization, resulting in a reduction in content; second, to prevent it from contacting with various components in the air, such as oxygen. If it comes into contact with oxygen for a long time, or reacts with oxidation, its chemical structure and properties will be changed.
Fourth, keep away from fire and heat sources. This substance is flammable, and there is a risk of fire or even explosion near fire or heat, just like dry wood near fire, which is dangerous.
Fifth, do not store with alkalis, oxidants, etc. P-methylbenzenesulfonic acid is acidic, and when it encounters a base, it will neutralize; when it coexists with an oxidizing agent, or a violent redox reaction occurs, it can destroy its original properties and even cause a dangerous appearance.
In short, when storing P-methylbenzenesulfonic acid, one must follow the above things and be careful to ensure its quality and use, and avoid danger.

What is the preparation method of P-Methylbenzenesulfonic Acid?

The method of preparing p-toluene sulfonic acid is to start with toluene and make it react with concentrated sulfuric acid. In this reaction, concentrated sulfuric acid is both a sulfonating agent and a dehydrating agent.
Put an appropriate amount of toluene in the reactor, slowly add concentrated sulfuric acid, and closely control the temperature. Usually, the reaction temperature should be maintained within a specific range, because the temperature is too high, it may cause side reactions to occur and generate too many impurities; if the temperature is too low, the reaction rate will be slow and time-consuming.
During the reaction process, the hydrogen atom in the methyl para-position of toluene is attacked by the sulfonic acid group (SO-H) in the concentrated sulfuric acid, and the two undergoes a substitution reaction, resulting in the formation of p-toluene sulfonic acid.
After the reaction is completed, the product needs to be separated and purified. Generally, it is cooled first to allow the p-toluenesulfonic acid in the reaction mixture to crystallize and precipitate, and then the crude product is obtained by filtration.
The crude product still contains impurities, so it needs to be purified by recrystallization. Choose a suitable solvent, dissolve the crude product, and concentrate it by heating, cool crystallization, and re-filtration to obtain pure p-toluenesulfonic acid. Throughout the preparation process, be sure to pay attention to the specifications of operation to ensure safety, and pay attention to the purity and yield of the product.

P-Methylbenzenesulfonic impact of Acid on the environment

"Heavenly Works" is a collection of ancient books of science and technology. However, there is no such thing as "P-Methylbenzenesulfonic Acid (methylbenzenesulfonic acid) " in it, because it is not known to be in this state. In ancient Chinese, this thing is the shadow of the world.
Methylbenzenesulfonic acid, acidic, if it is in the environment, it can cause acidification of water. Water, the source of life, acidification of water, harming aquatic organisms. Such as, its survival and reproduction In the environment suitable for acid, water acidification, breaking its balance, causing disease and death, and affecting the water.
Furthermore, this thing may affect the soil. Soil is where plants take root and grow. Acidic substances enter the soil, which can change its acidity and damage soil fertility. When fertility decreases, the plant will thrive, and the mulberry will be affected by it.
In addition, if methylbenzenesulfonic acid is dispersed in the air, or it will be dispersed in the air, or it will be reacted to. Its reactive substances, or become, acid rain. I am careful to prevent it from being used, so that the world is always clear and the people are rich.