2-Naphthylamine-1-Sulfonic Acid

Lingxian Chemical

Specifications

HS Code	762944
Chemical Formula	C10H9NO3S
Molar Mass	223.25 g/mol
Appearance	Pale yellow to light brown crystals or powder
Solubility In Water	Slightly soluble in cold water, more soluble in hot water
Solubility In Organic Solvents	Soluble in ethanol, ether
Melting Point	288 - 290 °C
Pka	2.78
Acidic Properties	Acts as a weak acid due to the presence of -SO3H group
Stability	Stable under normal conditions, but may decompose on heating or under strong oxidizing agents
Odour	Odourless

Packing & Storage

Packing	25 - kg bags of 2 - Naphthylamine - 1 - Sulfonic Acid, well - sealed for chemical protection.
Storage	2 - Naphthylamine - 1 - Sulfonic Acid should be stored in a cool, dry, well - ventilated area, away from heat and ignition sources. Keep it in a tightly closed container to prevent moisture absorption and contact with air, which could potentially lead to degradation. Store separately from oxidizing agents and incompatible substances to avoid chemical reactions.
Shipping	2 - Naphthylamine - 1 - Sulfonic Acid is a chemical. For shipping, it must be properly packaged in corrosion - resistant containers. Follow regulations for hazardous chemicals, with labels indicating its nature and handling precautions during transport.

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General Information

Historical Development

The historical development of 2-naphthylamine-1-sulfonic acid is quite impressive. In the past, chemists were first involved in this substance, studying its properties and production methods. At that time, the technology was not refined, and it was quite difficult to obtain.
After the age of circulation, science and technology gradually developed, the production method was improved, and the output increased. In the dye industry and other industries, it has emerged as a source of many colors. And researchers have been unremitting to explore more uses and expand fields.
Looking at its history, from the initial exploration of ignorance to wide application, it depends on the wisdom and diligence of scholars of various generations to have today's appearance. In the field of chemical industry, it occupies a place, and the prospect can still be looked forward to. The future may have more wonderful uses.

Product Overview

2-Naphthylamine-1-sulfonic acid is an important chemical substance. Its color is white or yellowish and crystalline. It is widely used in the chemical industry and is often a key raw material for the synthesis of dyes and pigments.
This substance has unique chemical properties and can participate in a variety of chemical reactions. In the preparation of dyes, through specific reactions, it can give the dye excellent color and stability.
Preparation of 2-naphthylamine-1-sulfonic acid often requires several rigorous steps and operation according to specific process conditions to obtain high-quality products.
Safety should also be paid attention to when storing and using. Due to its toxicity and irritation, it should follow relevant regulations and be properly disposed of to prevent harm to the human body and the environment.

Physical & Chemical Properties

2-Naphthylamine-1-sulfonic acid, this compound has unique physical and chemical properties. Its shape may be crystalline, and its color may be white to yellowish. The melting point has its specific value, and in organic solvents, the solubility varies. In terms of chemical activity, it can participate in many reactions due to the presence of amine groups and sulfonic acid groups. Amine groups are basic and can form salts with acids; sulfonic acid groups are acidic and can be neutralized with bases. In the field of organic synthesis, it is a key intermediate. After a series of reactions, it can produce a variety of dyes, medicines and other products. Its stability is good under specific conditions, but it may change in extreme environments such as high temperature and strong acid and alkali. Due to its physical and chemical properties, it has important applications in industrial production and scientific research.

Technical Specifications & Labeling

Today, there is 2-naphthylamine-1-sulfonic acid, which is crucial for industrial application. Its technical specifications and identification (commodity parameters) are crucial.
To make 2-naphthylamine-1-sulfonic acid, a rigorous process needs to be followed. The choice of raw materials must meet high standards. During operation, temperature, pressure and other conditions must be precisely controlled. For example, in a reactor, the temperature should be stable within a certain range to promote the reaction and maintain the purity of the product.
Looking at its logo, the commodity parameters should be listed in detail. Such as purity geometry and impurity content, all need to be clear. In this way, the user can choose this product according to it and use it in a suitable area. And the logo should comply with the prevailing regulations, so that the industry can identify it, which is beneficial to trade and application. Technical specifications and labels are correct, so that the production and use of 2-naphthylamine-1-sulfonic acid can run smoothly.

Preparation Method

The method of preparing 2-naphthylamine-1-sulfonic acid is related to the raw materials and production process, reaction steps and catalytic mechanism. The raw materials often start with naphthalene, and go through sulfonation, nitrification and other steps. First take an appropriate amount of naphthalene, sulfonate with sulfuric acid to obtain naphthalene sulfonic acid. Then, through nitrification reaction, nitro is introduced. Then through reduction step, the nitro group is converted to amino group, then 2-naphthalamine-1-sulfonic acid is obtained. The catalytic mechanism is also crucial. For example, sulfuric acid can be used as a catalyst during sulfonation to promote the reaction to speed up. The reaction step needs to be carefully controlled conditions, and the temperature and time are fixed. When sulfonated, the temperature should be appropriate. If it is too high, the side In this way, according to these tips, 2-naphthylamine-1-sulfonic acid can be prepared.

Chemical Reactions & Modifications

I have dedicated myself to the research of chemical products, especially 2 - Naphthylamine - 1 - Sulfonic Acid. Its chemical reaction and modification are related to the characteristics of the product and are very important.
In the past, the principle of the reaction was explored, but the effect of the reaction was not perfect by conventional methods. Although all conditions are available, the quality and quantity of the product can be improved.
So I thought about the way of change, observed the structure of its molecules, and examined the environment of the reaction. Or adjust the temperature, or change the ratio of reagents, hoping to make new discoveries.
After repeated experiments, something can be achieved. With the new method of reaction, the purity of the product is increased and the performance is also improved. This chemical change, like clearing the clouds and seeing the sky, makes the products of 2-Naphthylamine-1-Sulfonic Acid more useful, in the process of industry, or have other contributions.

Synonyms & Product Names

For 2-naphthylamine-1-sulfonic acid, the name of the substance, or another name, can be cloud 1-amino-2-naphthalenesulfonic acid, which is synonymous. This substance has a wide range of industrial uses, and is often relied on as a raw material for the production of dyes and pigments. Although its names are different, they refer to the same thing. In the past, Fang family studied it, and it was often called by different names. At that time, or according to its shape, or according to its origin, each was given a name. Although the names are mixed, but the origin is also one. Nowadays, the industry is becoming more and more unified, and the name 2-naphthylamine-1-sulfonic acid is becoming more and more commonly used. However, the old synonymous name cannot be forgotten, and it is also a sign of chemical research.

Safety & Operational Standards

2 - Naphthylamine - 1 - Sulfonic Acid Safety and Operating Specifications
Husband 2 - Naphthylamine - 1 - Sulfonic Acid is an important substance in chemical research. During its experimental operation and use, safety considerations and specifications are of paramount importance.
First word safety. This substance may be dangerous. When storing, it must be placed in a cool, dry and well-ventilated place. Keep away from fire and heat sources to prevent accidents. Its packaging should be intact to avoid leakage. If it leaks accidentally, emergency measures should be taken quickly. Evacuate relevant personnel to a safe area first, and strictly prohibit unrelated personnel from approaching. For a small amount of leakage, a clean shovel can be used to collect it in a dry, clean, covered container; if the amount of leakage is large, a dike should be built or excavated for containment, and a pump should be transferred to a tanker or a special collector for recycling or transportation to a waste disposal site for disposal.
Times and operating specifications. When operating, the experimenter must wear appropriate protective clothing, protective gloves and goggles to prevent the substance from coming into contact with the skin and eyes. Operate in a fume hood to ensure air circulation and avoid inhaling its dust or volatiles. Use a precise measuring instrument to measure the substance, and do not measure it at will to ensure the accuracy and safety of the experiment. After the operation, be sure to clean the appliance used and store it properly.
Furthermore, in terms of waste treatment, waste containing 2-Naphthylamine-1-Sulfonic Acid should not be discarded at will. It needs to be treated harmlessly in accordance with relevant environmental regulations. It can be decomposed by chemical methods or disposed of by professional waste treatment institutions.
In short, in the research and use of 2-Naphthylamine-1-Sulfonic Acid, strict adherence to safety and operating standards can ensure the success of the experiment and ensure the safety of personnel and the environment.

Application Area

2-Naphthylamine-1-sulfonic acid is very useful in many fields. In the dyeing and weaving industry, it is often the key raw material for the preparation of dyes. The dyes made are bright in color and have good fastness, which can make the color of fabrics last for a long time. In the field of medicine, some of its derivatives have been studied or have specific pharmacological activities. Although they are not completely clear, they have attracted the attention of many doctors and researchers. In the field of chemical analysis, they can be used as specific reagents to accurately determine the composition and content of certain substances. From this point of view, 2-naphthylamine-1-sulfonic acid has shown important value in various application fields such as industry, medicine and scientific research, and it is a chemical substance worthy of in-depth exploration and research.

Research & Development

Modern chemistry has flourished, studying the properties of matter, seeking the principles of creation, and all kinds of achievements are changing with each passing day. Today's discussion of 2 - Naphthylamine - 1 - Sulfonic Acid is really a corner of chemical research.
At the beginning of the research, all the wise men worked hard to investigate its structure and analyze its components. Although the thorns were on the way, they were unremitting. At the beginning, the preparation method was not good, and the yield was quite low. However, everyone thought hard and changed, improved the process, and gradually achieved success.
Then, the field of its application was also opened up. In the dyeing and weaving industry, it is a color-enhancing agent, and the fabric is used for its bright color and fastness; in medicine, or as the foundation of synthetic medicine, it heals diseases and benefits the common people.
As for the future, we should use technology as our wing to explore its secrets. Or in the genus of new energy and new materials, develop its new energy. Make this substance shine in the progress of scientific research and the rise of industry, adding a new chapter to the well-being of mankind.

Toxicity Research

Toxicity of 2 - Naphthylamine - 1 - Sulfonic Acid. Observe its chemical properties, or potential harm. After various experiments, animals are used as tests to observe its reaction. See the subject body, or there are signs of discomfort, physiological function or affected. Its effect on cells is also abnormal, or cause cell mutation, metabolic disorders. From this point of view, 2 - Naphthylamine - 1 - Sulfonic Acid is suspected of toxicity. Although the experimental samples are limited, the signs of toxicity have become apparent. Subsequent samples should be widely sampled to investigate its toxicology and clarify the degree of harm, so as to formulate appropriate measures for protection and application, so as not to endanger sentient beings with this poison.

Future Prospects

2-Naphthylamine-1-Sulfonic Acid, although we know it now, there is still a vast world waiting for us to explore in the future. It can bloom new buds in the fields of chemical industry. Or in the creation of materials, with its characteristics, it can breed tough and specific new materials to meet the needs of the time. In the corner of medical research and development, or according to its chemical properties, it can dig a cure for new diseases and save people's pain. Or in the world of dyeing and weaving, it can give birth to colorful and lasting bright dyes, adding splendor to the world. In the future, with time and unremitting research, we will be able to fully develop its potential, use it for the world, and benefit Wanbang. This is the vision that our chemical researchers look forward to.

Frequently Asked Questions

What are the main uses of 2-Naphthylamine-1-Sulfonic Acid?

2-Naphthylamine-1-sulfonic acid has a wide range of uses. In the dye industry, this is a key intermediate. In the past, many colorful dyes relied on its preparation. To obtain azo dyes with bright color and good fastness, 2-naphthylamine-1-sulfonic acid is indispensable. Through a series of delicate chemical reactions, it can be cleverly combined with other compounds to form the special structure required for dyes, so that fabrics can be dyed in colorful colors and will not fade for a long time.
In the field of medicine, it also contributes. Although not directly used in medicine, it plays an important role in the synthesis of some drugs. For some drugs with specific curative effects, in their synthesis path, 2-naphthylamine-1-sulfonic acid can be used as a starting material or a key intermediate to help build the chemical structure of the active ingredient of the drug, thus providing effective drugs for doctors to treat diseases and save people.
In the field of analytical chemistry, 2-naphthylamine-1-sulfonic acid can also play a role. Due to its special chemical properties, it can be used for qualitative and quantitative analysis of certain substances. With the help of its unique chemical reaction with specific substances, by observing the reaction phenomenon or measuring the relevant physical and chemical parameters, the analyst can accurately know the content and properties of specific components in the sample, just like an "insight tool" in the field of chemistry.

What are the physical properties of 2-Naphthylamine-1-Sulfonic Acid?

2-Naphthylamine-1-sulfonic acid, its physical properties are as follows:
This substance is a solid under normal conditions, and it is usually in the state of white to slightly yellow crystalline powder. The change of its color may vary due to the different impurities it contains. The texture is fine, and it occasionally feels bright when viewed under light.
When it comes to solubility, 2-naphthylamine-1-sulfonic acid has a certain solubility in water. However, its dissolution state cannot be achieved overnight, and it needs to be dissolved by stirring, heating, etc., before it can gradually dissolve. In hot water, its dissolution rate is faster than in cold water, and its solubility also increases. In addition to water, it can also be dissolved in some organic solvents, such as ethanol, acetone, etc. When dissolved in ethanol, the solution is clear and yellowish.
Melting point is one of the key physical properties, and the melting point of 2-naphthylamine-1-sulfonic acid is quite high. When heat is applied to it, the temperature gradually rises to a specific temperature range, and it gradually changes from solid state to liquid state. This temperature is where the melting point is. The determination of melting point is often done by precision instruments to ensure that the value is accurate.
Density is also an important physical property. Its density is larger than that of ordinary light powders. When placed in a container, it takes up a relatively small space and has a slightly compact texture.
In addition, 2-naphthylamine-1-sulfonic acid is hygroscopic. If exposed to air, especially in an environment with high humidity, it is easy to absorb water vapor in the air, causing self-deliquescence, gradual loss of crystalline state, and a soft state. When storing, it needs to be placed in a dry place to prevent it from affecting the quality due to moisture absorption.
This is a common physical property of 2-naphthylamine-1-sulfonic acid. In many fields such as chemical industry and scientific research, understanding its properties is crucial, and it is related to the success or failure of related experiments and production.

What are the chemical properties of 2-Naphthylamine-1-Sulfonic Acid?

2-Naphthylamine-1-sulfonic acid is one of the most characteristic organic compounds. It is acidic. Due to the sulfonic acid group, hydrogen ions can be partially ionized in water, so it is acidic and can neutralize with alkali substances. If it meets sodium hydroxide, it will generate corresponding salts and water.
The solubility of this compound also has its own characteristics. In some polar solvents, such as water, due to the hydrophilicity of the sulfonic acid group, it has a certain solubility; however, in non-polar solvents, such as benzene, the solubility is very small. The chemical properties of 2-naphthylamine-1-sulfonic acid are active, and the naphthalene ring is rich in electron clouds, which are vulnerable to the attack of electrophilic reagents, triggering electrophilic substitution reactions. The presence of sulfonic acid groups will affect the position of the substitution reaction on the naphthalene ring, making it more prone to substitution at a specific location.
In addition, there is a conjugate system in its molecules, which makes the compound exhibit optical properties. Under the irradiation of light of a specific wavelength, it may exhibit absorption or emission phenomena. This property may have applications in some analytical and testing fields. Furthermore, 2-naphthylamine-1-sulfonic acid is often used as an intermediate in the field of organic synthesis. Many organic compounds with complex structures and specific functions can be prepared by chemical modification of its naphthalene ring and sulfonic acid group.

What is the production method of 2-Naphthylamine-1-Sulfonic Acid?

The method of preparing 2-naphthylamine-1-sulfonic acid is obtained by the interaction of naphthylamine with fuming sulfuric acid. The method is as follows:
First take an appropriate amount of naphthylamine and place it in a special reactor. The reactor needs to be made of high-quality material and can withstand the chemical action and temperature changes during the reaction. Then, the fuming sulfuric acid is slowly poured into the kettle. When pouring in, the flow rate must be carefully controlled so that the two can be evenly mixed. During this process, the reaction is quite violent and a lot of heat is released.
In order to make the reaction go smoothly and avoid the reaction getting out of control due to excessive temperature, the reactor needs to be cooled. Usually circulating water or other suitable cooling medium is used to flow around the reactor to remove excess heat and maintain the reaction temperature within a specific range.
With the addition of fuming sulfuric acid, the naphthylamine molecule gradually reacts with the sulfate ion. The structure of naphthylamine changes due to the introduction of sulfate and is gradually converted into 2-naphthylamine-1-sulfonic acid. This reaction requires continuous stirring to fully contact the reactants, accelerate the reaction process, and ensure the uniformity of the reaction.
After the reaction is completed, the resulting product often contains unreacted raw materials, by-products, and other impurities. At this time, a series of separation and purification steps are required. Filtration is first used to remove insoluble solid impurities. Then use crystallization, extraction and other means to further purify the product to obtain high-purity 2-naphthylamine-1-sulfonic acid.
The whole preparation process requires strict control of reaction conditions, such as temperature, ratio of reactants, reaction time, etc., which will have a significant impact on the quality and yield of the product. Only fine operation and strict follow of process regulations can produce high-quality 2-naphthylamine-1-sulfonic acid.

2-Naphthylamine-1-Sulfonic precautions in the use of Acid

For 2-naphthylamine-1-sulfonic acid, many things need to be paid attention to when using it.
First safety protection. This substance is toxic and irritating, and can be harmful if it touches the skin, inhaled or ingested by mistake. Therefore, when using it, be sure to wear suitable protective equipment, such as gloves, goggles and gas masks, to prevent direct contact with the human body. The operation should be carried out in a well-ventilated place. If conditions permit, it is best to operate in a fume hood to reduce the risk of harmful gas accumulation.
Furthermore, pay attention to storage conditions. Store in a cool, dry and ventilated place, away from fire and heat sources, and protected from direct sunlight. It must be stored separately from oxidizing agents, acids, alkalis, etc., and should not be mixed to avoid chemical reactions and cause danger.
During use, operate strictly according to the specifications. Precisely control the dosage to avoid waste and environmental pollution caused by excessive use. After use, properly dispose of the remaining substances and waste, and do not dump them at will. They should be treated harmlessly in accordance with relevant regulations.
In addition, during the experiment or production process, the reaction conditions also need to be carefully controlled. Factors such as temperature, pH, reaction time, etc. may affect the result of the reaction and the purity of the product. Pay close attention to the reaction process and record relevant data in a timely manner for subsequent analysis and summary.
At the same time, operators should be professionally trained to be familiar with the properties, hazards and emergency treatment methods of the substance. In case of accidental contact, rinse immediately with plenty of water and seek medical attention in time according to the specific situation. In this way, the process of using 2-naphthylamine-1-sulfonic acid can be ensured to be safe and secure, and the desired effect can be achieved.