2-Amino-5-Naphthalenesulfonic Acid

Lingxian Chemical

Specifications

HS Code	209963
Chemical Formula	C10H9NO3S
Molar Mass	223.25 g/mol
Appearance	Pale yellow to light brown crystals or powder
Solubility In Water	Slightly soluble
Solubility In Organic Solvents	Soluble in some organic solvents like ethanol
Melting Point	173 - 177 °C
Pka Value	Approximately 3 - 4 (for acidic groups)
Ph In Aqueous Solution	Acidic
Odor	Odorless or very faint odor
Stability	Stable under normal conditions but may react with strong oxidizing agents

Packing & Storage

Packing	250g of 2 - Amino - 5 - Naphthalenesulfonic Acid packaged in a sealed plastic bag.
Storage	2 - Amino - 5 - Naphthalenesulfonic Acid should be stored in a cool, dry, well - ventilated area. Keep it away from heat sources, flames, and oxidizing agents. Store in tightly sealed containers to prevent moisture absorption and contamination. This helps maintain its chemical stability and reduces the risk of decomposition or unwanted reactions.
Shipping	2 - Amino - 5 - Naphthalenesulfonic Acid should be shipped in well - sealed, corrosion - resistant containers. Ensure proper labeling with hazard warnings. Ship via carriers compliant with chemical transportation regulations to prevent spills and ensure safety.

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General Information

Historical Development

2-Amino-5-naphthalenesulfonic acid is also a chemical substance. At the beginning, scholars studied it carefully, wanting to explore its wonders. At the beginning, the synthesis method was not good, and the yield was quite low. However, the public worked tirelessly for many years, and the research continued. Gradually get the best method, the yield also increased. In the past, this product was not widely used, but later due to the progress of chemical industry, it showed its ability in dyes and medicine. Therefore, its demand increased gradually, and the industry improved its skills and expanded its output. Looking at the way of its development is the result of the diligence of all scholars and industry. Although the road was blocked and long, he was determined to pursue it, and finally achieved today's prosperity. This is all the work of the predecessors, establishing a foundation for future generations of entrepreneurs, enabling them to expand their ambitions in this field.

Product Overview

Product Overview
2-Amino-5-naphthalenesulfonic acid is a crucial compound in the field of chemistry. Its properties are white to light gray powder, which is widely used in many branches of chemical industry.
This product has a significant position in the field of dye synthesis and is often used as a key intermediate. It can help generate a variety of dyes with bright colors and good fastness, greatly enriching the color selection of the printing and dyeing industry. In the field of pharmaceutical research, its unique chemical structure has also attracted attention, or has potential value for some drug research and development, providing new opportunities for pharmaceutical innovation.
However, the preparation of this compound requires fine operation and specific conditions. The reaction process requires precise control of temperature, pH and other parameters to ensure the purity and yield of the product. And because of its certain chemical activity, it is necessary to pay attention to moisture-proof and oxidation-proof during storage to maintain its quality stability.

Physical & Chemical Properties

2-Amino-5-naphthalenesulfonic acid is also a chemical compound. Its physical properties are often white or nearly white powder, and it has special solubility in water. Soluble in liquid, but soluble in cold water, soluble in water. Its chemical activity and amino-sulfonic acid group can be synthesized and reacted. It can be formed and can also be synthesized under specific conditions. Due to its properties, it can be used in the fields of dyes and chemical synthesis. Because it contains aromatic and functional groups, it gives this compound its general characteristics, making it important for chemical research and application. To explore its properties, in order to explore its uses, it is also important for chemical research.

Technical Specifications & Labeling

The technical specifications and labels of 2-amino-5-naphthalenesulfonic acid (commodity parameters)
Fu 2-amino-5-naphthalenesulfonic acid is a chemical we have painstakingly researched. Its technical specifications are related to the quality of the product. Looking at its color, when it is pure and free of impurities, it is white or white-like; checking its quality, it should be delicate and uniform, without the harm of agglomerates.
Regarding its identification, the product parameters must be detailed. The content must be accurate and correct, and it must meet the prevailing standards in the industry to be qualified. And on the packaging, the factory name, factory address, batch and other information should be clearly identifiable for traceability.
Only by strictly adhering to this technical specification and marking can 2-amino-5-naphthalenesulfonic acid be trusted by users and contribute to the development of the industry when it is circulated in the market.

Preparation Method

The preparation method of 2-amino-5-naphthalenesulfonic acid is related to the raw material and production process, reaction steps and catalytic mechanism.
To make this product, naphthalene is often used as the initial raw material. First, through a sulfonation reaction, the naphthalene is co-heated with concentrated sulfuric acid, and a sulfonic acid group is introduced at a specific position in the naphthalene ring to obtain a naphthalenesulfonic acid intermediate. This step requires temperature control and reaction time to ensure the precise positioning of the sulfonic acid group.
Then, the intermediate is nitrified and nitro is introduced. Mixed acid (mixed nitric acid and sulfuric acid) is used as the nitrifying agent. The reaction conditions are strict, and the temperature and acid concentration all affect the nitro introduction position and yield.
Then, the nitro- Commonly used reduction methods, such as iron powder and hydrochloric acid as reducing agents, the nitro group is gradually converted into an amino group, and finally 2-amino-5-naphthalenesulfonic acid is obtained. During this period, the catalytic mechanism is also critical, and a suitable catalyst can accelerate the reaction, improve the yield and purity. Each step is closely linked, and precise operation can efficiently prepare the product.

Chemical Reactions & Modifications

Taste the industry of chemical industry, delve into the road, often involved in the change of substances, in order to study the wonders. Now on 2 - Amino - 5 - Naphthalenesulfonic Acid, the chemical reaction and change are particularly critical.
The chemical reaction of the husband is related to the transformation of substances. 2 - Amino - 5 - Naphthalenesulfonic Acid, under various conditions, or with other substances, or self-decomposition, the process is delicate. The reaction rate and the shape of the product depend on the properties of temperature, pressure and catalyst. Those who control these numbers well can obtain the expected results.
As for change, this substance may change due to differences in the environment, structure, and properties. Chemists use their wisdom to seek ways to improve. Or adjust its reaction environment, or improve its synthesis techniques, hoping for better performance. Make this substance more effective and convenient for industrial and scientific research use. In the process of study, although it is difficult, chemists are determined to use wisdom and perseverance to break the problem of chemical reaction and change, so as to benefit the world.

Synonyms & Product Names

From 2024 onwards, the domestic language, 2 - Amino - 5 - Naphthalenesulfonic Acid
In recent years, the names of the literature では、これらの are still used in the official nomenclature of the いられているが、 country, 2 - Amino - 5 - Naphthalenesulfonic Acid, and the general purpose of にある。これは、 scientific research, communication, and exchange of specific objects ったものである。

Safety & Operational Standards

Specifications for safety and operation of 2-amino-5-naphthalenesulfonic acid
Fu 2-amino-5-naphthalenesulfonic acid is also a common substance in chemical preparation. During its preparation and use, safety and operation standards are of paramount importance.
Before preparation, all raw materials must be checked in detail. If the purity and quality are not suitable, do not use it. And the preparation site should be well ventilated to prevent the accumulation of harmful gases. The utensils used must be clean and undamaged, and cover unclean or damaged utensils, which are prone to abnormal reactions and endanger safety.
When operating, the operator is in front of appropriate protective equipment, such as protective clothing, protective gloves and goggles. This is to protect the body and avoid direct contact with the substance. Because it may be corrosive, touching it will damage the skin and eyes. If you accidentally touch it, rinse it with a lot of water immediately and seek medical treatment as soon as possible.
During the reaction process, temperature, pressure and other conditions should be strictly controlled. Minor differences may cause the reaction to go out of control, leading to explosions and fires. When heating, it is especially necessary to be cautious, step by step, and not too hasty. And the stirring rate should also be appropriate to ensure a uniform reaction.
After the preparation is completed, the storage of the product should also be followed. When placed in a cool, dry and ventilated place, away from sources of ignition and oxidants. Chemicals of different types should not be mixed to prevent interaction and cause danger.
When transporting, the packaging must be tight and firm, marked with clear warning labels. The person handling should also handle it with care to avoid violent vibration and collision.
In short, in the preparation, use, storage and transportation of 2-amino-5-naphthalenesulfonic acid, all aspects must comply with safety and operating practices. In this way, personnel safety is guaranteed, accidents are avoided, and chemical research and production are smooth.

Application Area

Today there is a product called 2-Amino-5-Naphthalenesulfonic Acid. This product is quite useful in the field of printing and dyeing. It can be used as a raw material for the synthesis of dyes. The dyes made are bright in color and have good fastness. The color of dyed fabrics will not fade for a long time. In the paper industry, it is also used as an auxiliary agent for paper dyeing, making the color of paper uniform and long-lasting.
Furthermore, in the field of pharmaceutical and chemical industry, it is also a key intermediate. Based on this, it can make a variety of drugs, either with therapeutic effects or as an auxiliary agent, contributing a lot to the development of medicine. Its wide application is related to many aspects of people's livelihood, and it is an indispensable chemical substance.

Research & Development

The industry of chemical industry is changing with each passing day, and the research of materials is related to the world's luck. Today there is 2 - Amino - 5 - Naphthalenesulfonic Acid, and I devote myself to the research.
At the beginning, explore its properties, analyze its structure, and know that it is an organic quality with unique properties. It can be used in many fields of chemical industry.
Then, study its method and seek a good strategy for preparation. After repeated trials, the method has advantages and disadvantages. Or the cost is high, or the process is complicated.
Today, I think to expand its use. In the industry of dyes, I hope to increase the freshness of its color, and it will not fade for a long time; in the road of medicine, I hope to investigate its pharmacology and seek opportunities for treatment. Although the road ahead is long, my heart is firm, and I hope to make unremitting research, so that this substance can be widely used, and in the way of research and progress, I will make great strides forward for the prosperity of chemical industry, exhausting my strength.

Toxicity Research

The industry of chemical industry is related to people's livelihood, but the study of poisons in it should not be careless. Now on the 2 - Amino - 5 - Naphthalenesulfonic Acid, the study of its toxicity is particularly important.
Guanfu 2 - Amino - 5 - Naphthalenesulfonic Acid, used in chemical production or has its own uses. However, its nature or toxicity. If people touch it, or enter through the skin, or enter through breathing, it can cause harm. In light cases, or feel uncomfortable, such as dizziness and dizziness; in severe cases, it will damage the organs and endanger life.
And this thing is in the environment, and it is not good. Or sewage soil, causing organisms to suffer from it. Aquatic things, or die because of it; soil plants, or wither because of it.
Therefore, when studying its toxicity, it is necessary to examine its rationale in detail. In the production place, it is necessary to strictly set up preventive measures to protect people before they occur; in the environment, it is necessary to clarify the rules of its diffusion and prevent its harm from being invisible. In this way, only the chemical industry can be prosperous and people can be safe, and the environment can be peaceful.

Future Prospects

Husband 2 - Amino - 5 - Naphthalenesulfonic Acid is also a product of transformation. There is no hope for the future prospects of the present.
In the field of work, it may be able to add new colors to dyes. With its unique characteristics, the resulting dyes may have a brighter color and better fastness, which can be used in printing and dyeing of materials, etc., to expand the application environment and make the color of cloth new for a long time.
The way of scientific research also has the prospect of a new environment. Those who can use its foundation to research new materials, or have special physical and chemical properties, can use it in the fields of light, catalysis, etc., to expand the color and promote the development of technology.
Therefore, 2 - Amino - 5 - Naphthalenesulfonic Acid has not yet been developed, and it will be able to develop its capabilities in a wide range of fields.

Frequently Asked Questions

What are the main uses of 2-Amino-5-Naphthalenesulfonic Acid?

2-Amino-5-naphthalenesulfonic acid, this is an organic compound. It has a wide range of uses and plays an important role in the dye industry.
The cover provides a key raw material for dye synthesis due to its unique structure, containing amino and sulfonic acid groups, which endows it with many properties. Through a series of chemical reactions, it can be cleverly combined with other compounds to create colorful and excellent dyes. The preparation of many types of dyes such as acid dyes and direct dyes often relies on this substance.
In the field of medicine, it also has certain applications. Due to its specific chemical properties, it may participate in the synthesis of some pharmaceutical intermediates. Drug intermediates are key links in drug synthesis. After further reaction and modification, they can be converted into drugs with specific pharmacological activities.
In addition, in the field of organic synthesis, 2-amino-5-naphthalenesulfonic acid is an important raw material for organic synthesis, which can be used to synthesize many organic compounds with special structures and functions. Its sulfonic acid groups and amino groups can participate in a variety of reactions, such as substitution reactions, condensation reactions, etc., providing organic synthesis chemists with rich strategies and paths to construct complex and novel organic molecular structures to meet the needs of different fields for special organic compounds.

What are the physical properties of 2-Amino-5-Naphthalenesulfonic Acid?

2-Amino-5-naphthalenesulfonic acid, its shape is white to light gray powder, slightly soluble in cold water, easily soluble in hot water. When its aqueous solution encounters ferric chloride test solution, it is dark purple. The melting point is about 300 ° C, and toxic gases are liberated when heated. The substance is relatively stable in acidic media, and may react accordingly under alkaline conditions. Because its molecule contains amino and sulfonic acid groups, it has a certain acid-base amphoteric, and can interact with acids and bases respectively. In organic solvents, its solubility is relatively limited, and it mostly exhibits hydrophilicity. This substance is widely used in chemical fields such as dyes and medicine, and is an important intermediate in organic synthesis.

What are the chemical properties of 2-Amino-5-Naphthalenesulfonic Acid?

2-Amino-5-naphthalenesulfonic acid is a class of organic compounds. Its chemical properties are unique, so let me tell you in detail.
This compound is acidic, due to the sulfonic acid group (-SO-H). The sulfonic acid group can dissociate hydrogen ions in water, thus exhibiting acidic properties, and can neutralize with bases to form corresponding salts. If reacted with sodium hydroxide, hydrogen ions in the sulfonic acid group combine with hydroxyl ions to form water, and then form 2-amino-5-naphthalenesulfonic acid sodium.
The amino group of 2-amino-5-naphthalenesulfonic acid (-NH _ 2) has a certain alkalinity. Although the alkalinity of amino groups is weaker than that of common inorganic bases, they can react with acids under certain conditions. For example, when interacting with hydrochloric acid, amino nitrogen atoms can bind hydrogen ions to form a positively charged ammonium salt structure.
There is a conjugate system in its molecules, and the electron cloud between the naphthalene ring and the amino group and the sulfonic acid group affects each other. This conjugate structure has a significant effect on the stability and spectral properties of the compound. Due to the conjugate effect, the compound is relatively stable, and there is a specific absorption peak in the ultraviolet-visible spectrum, which is conducive to its qualitative and quantitative analysis.
2-amino-5-naphthalenesulfonic acid can also undergo substitution reactions. The amino group and the sulfonic acid group are both activating groups, which can increase the electron cloud density on the naphthalene ring and make the naphthalene ring more susceptible to attack by electrophilic reagents. Under appropriate conditions, electrophilic reagents can replace the hydrogen atoms on the naphthalene ring to form various substituted derivatives.
In terms of redox reaction, 2-amino-5-naphthalenesulfonic acid also has certain characteristics. The structure of the naphthalene ring connected to the amino group and the sulfonic acid group may undergo oxidation reaction under the action of a specific oxidant, resulting in the change of the structure of the naphthalene ring or the transformation of functional groups; in the case of strong reducing agents, reduction reactions may also occur, such as hydrogenation and reduction of the naphthalene ring. The chemical properties of 2-amino-5-naphthalenesulfonic acid are rich and diverse, and it has important application value in many fields such as organic synthesis, dye preparation, and drug development.

What is the production method of 2-Amino-5-Naphthalenesulfonic Acid?

2-Amino-5-naphthalenesulfonic acid, formerly known as turnionic acid, was prepared by the following steps in the past.
First, naphthalene was used as the starting material and was sulfonated. In a specific reactor, naphthalene was injected and sulfuric acid was used as the sulfonating agent, and the temperature was controlled at a certain range, such as 160-165 ° C. After a few hours, the sulfonation of naphthalene was reacted into 1-naphthalenesulfonic acid. In this reaction, the concentration of sulfuric acid, the reaction temperature and time are all key factors, and a slight difference in the pool affects the purity and yield of the product.
The reaction of nitrification of 1-naphthalenesulfonic acid under the catalysis of mercury salt Usually, mixed acid (a mixture of nitric acid and sulfuric acid) is used as a nitrifying agent. At an appropriate low temperature, such as 0-5 ° C, the mixed acid is slowly added dropwise to obtain 1-nitro-2-naphthalenesulfonic acid. The dosage of mercury salt, the ratio of mixed acid and the speed of dropwise addition all need to be precisely controlled, otherwise it is prone to side reactions and the product is complicated and difficult to purify.
Next, 1-nitro-2-naphthalenesulfonic acid is reduced. Iron powder and hydrochloric acid are often used as a reduction system, heated and refluxed to convert the nitro group into an amino group, and then 2-amino-5-naphthalenesulfonic acid is obtained. The fineness of iron powder, the concentration of hydrochloric acid, and the temperature and time of the reaction have a great influence on the reduction effect.
Finally, the product is separated and purified. First, the pH value of the reaction solution is adjusted by neutralization, so that the product precipitates and precipitates, and then filtration, washing, recrystallization and other means are used to improve the purity of the product to meet the standards of industrial applications or other uses. Each step of the reaction is related to the quality and output of the product. Fine operation is required to obtain the ideal 2-amino-5-naphthalenesulfonic acid.

What is the price range of 2-Amino-5-Naphthalenesulfonic Acid in the market?

In today's market, the price of 2-amino-5-naphthalenesulfonic acid often varies due to quality, supply and demand. In the past, "Tiangong Kaiwu" was written in the Ming Dynasty, and the price of this product was not stated at that time, because the chemical process at that time was not in this state.
In today's world, 2-amino-5-naphthalenesulfonic acid in the city, if it is an ordinary industrial grade, the price per kilogram may be in the tens of yuan. However, if its purity is quite good, it is suitable for high-end fields such as fine chemicals and pharmaceutical research and development, and the price is high. For high purity, it may reach hundreds of yuan per kilogram.
In addition, the supply and demand situation has a huge impact on the price. If there are many people in the market, but there are few products, the price will rise; on the contrary, if there is excess capacity and weak demand, the price will also fall. And in different places, due to different logistics, taxation, etc., the price is also different. Basically speaking, in prosperous commercial ports, due to convenient circulation and fierce competition, the price may be relatively easy; in remote places, due to difficult transportation, the price may be slightly higher. Therefore, if you want to know the exact price, you should carefully study the market conditions and visit merchants and business people before you can get it.