4-Hydroxynaphthalene-2,7-Disulphonic Acid

Lingxian Chemical

Specifications

HS Code	326232
Chemical Formula	C10H8O8S2
Molar Mass	320.3 g/mol
Appearance	Solid (usually white or off - white powder)
Solubility In Water	Soluble
Pka Values	Multiple acidic pKa values due to two - SO3H and one - OH groups
Ph In Aqueous Solution	Acidic
Boiling Point	Decomposes before boiling
Odor	Odorless or very faint odor
Stability	Stable under normal conditions, but sensitive to strong oxidizing agents

Packing & Storage

Packing	Package contains 500g of 4 - Hydroxynaphthalene - 2,7 - Disulphonic Acid in resealable bag.
Storage	4 - Hydroxynaphthalene - 2,7 - Disulphonic 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 a tightly closed original container to prevent moisture absorption and contamination, ensuring its stability over time.
Shipping	4 - Hydroxynaphthalene - 2,7 - Disulphonic Acid should be shipped in tightly - sealed, corrosion - resistant containers. Ensure proper labeling for hazardous chemicals. Transport in accordance with regulations to prevent spills and environmental or safety risks.

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4-Hydroxynaphthalene-2,7-Disulphonic Acid

General Information

Historical Development

The origin and development of 4-hydroxy naphthalene-2,7-disulfonic acid is of great significance. In the past, chemical research was just beginning to flourish, and various sages continued to explore substances. At that time, the exploration of this acid was only a glimpse of the leopard in the tube. However, with the passage of time, the researchers' skills became more refined, and the instruments became more and more sophisticated. The analysis of its structure, from ignorance to clarity, the preparation method, from crude and delicate. First, only occasionally in the laboratory to obtain a small amount, after unremitting research, gradually can be made in batches. The field of its application is also narrow and broad, from the beginning little known, to now in dyeing, weaving, medicine and other industries, all have their uses, this is the fruit of chemical research, but also 4-hydroxynaphthalene-2,7-disulfonic acid development track.

Product Overview

4-Hydroxynaphthalene-2,7-disulfonic acid is a particularly important chemical. Its properties are active with sulfonic acid groups and unique reactivity with hydroxyl groups.
This substance often has a white to light yellow crystalline appearance, is soluble in water, and has good stability. In the chemical industry, it has a wide range of uses. In the manufacture of dyes, it can be a key intermediate. With its structural characteristics, it can help to form colorful dyes, adding brilliant colors to the fabric printing and dyeing industries. In the synthesis of some special chemicals, it is also indispensable. With its special functional groups, it can trigger a variety of chemical reactions and build complex molecular structures. The
preparation method requires multiple steps of precision reaction, and strict control conditions, such as temperature, pH, etc., all affect the yield and purity. During research and development, we should deeply explore its reaction mechanism and optimize the process to improve efficiency. We hope to expand its application in more fields in the future and contribute to the development of the chemical industry.

Physical & Chemical Properties

4 - Hydroxynaphthalene - 2,7 - Disulphonic Acid is a unique compound. Looking at its physical properties, at room temperature, it is often solid, white or slightly yellow, like a fine powder, with a fine texture. Its chemical properties are quite active, and the sulfonic acid group makes it acidic, which can neutralize with alkali substances to generate corresponding salts. The presence of hydroxyl groups also gives it special reactivity and can participate in a variety of organic synthesis reactions. Due to its unique physicochemical properties, it has applications in dyes, medicine and other fields. In the preparation of dyes, it can be used as an important intermediate to help generate dyes with bright color and good fastness; in the field of pharmaceutical research and development, some of its derivatives may have potential biological activities, which need to be further explored.

Technical Specifications & Labeling

For 4-hydroxynaphthalene-2,7-disulfonic acid, process specifications and identification (product parameters) are the key. Its process specifications are related to the selection of raw materials and the method of synthesis. The selection of materials must be pure, and the synthesis process, temperature, duration, and reagent mix are all fixed, with a slight difference, thousands of miles away.
On the logo, the name of the product must be accurate, and the name of 4-hydroxynaphthalene-2,7-disulfonic acid must not be corrupted. And its physical and chemical properties, such as color, state, melting point, and solubility, should be detailed. There are safety signs, and the risk of toxicity and explosion cannot be omitted. Both of these, process specifications and identification (product parameters), are fundamental to the production and use of 4-hydroxynaphthalene-2,7-disulfonic acid, and must be handled with caution.

Preparation Method

The preparation method of 4-hydroxynaphthalene-2,7-disulfonic acid is related to the raw material and production process, reaction steps and catalytic mechanism. The raw material needs to be selected from pure naphthalene, supplemented by an appropriate amount of sulfuric acid and fuming sulfuric acid. First, the naphthalene is placed in the reaction kettle, slowly injected with sulfuric acid, the temperature is controlled at one hundred and twenty to one hundred and fifty degrees Celsius, and the mixing is uniform. This is the first step of sulfonation. Then add fuming sulfuric acid, raise it to one hundred and eighty to two hundred degrees Celsius, and continue the reaction for several hours to make the sulfonation more complete. After the reaction is completed, let it cool, pour it into ice water to reduce the temperature and precipitate crystals. After filtering, washing, drying and other processes, pure 4-hydroxynaphthalene-2,7-disulf The catalytic mechanism is the strong acidity of sulfuric acid and fuming sulfuric acid, which promotes the sulfonation reaction of naphthalene to proceed efficiently. Each step needs to be precisely controlled to obtain high-quality products.

Chemical Reactions & Modifications

Guanfu 4-Hydroxynaphthalene-2, 7-Disulphonic Acid This substance, its transformation and denaturation, is an important one for our generation to study.
Those who respond to it, the phase value of various things, and the generation of new substances. In 4-Hydroxynaphthalene-2, 7-Disulphonic Acid, or the reaction of acid and base, or the change of oxidation and reduction. The structure of its molecules, the group of functions, all determine the direction and rate of transformation.
As for denaturation, the genera of temperature, pressure, and catalyst are all susceptible to change. Temperature and height are the change of disease, pressure change or induction. Catalysts, who promote response but cannot change their bodies, make good use of them, and can be diverted should be in the way of hope.
If you want to understand its adaptation and transformation, it is indispensable to study the experiments in detail and analyze the data in detail. Therefore, you can take charge of the rules and make good use of them in reality, which is also helpful for karmic prosperity and technological progress.

Synonyms & Product Names

4-Hydroxynaphthalene-2,7-disulfonic acid, which also has many other names. In the past, Fang family called it "naphthol disulfonic acid", because of its structure, related to naphthol, and has the characteristics of disulfonic acid, so the name is obtained. Another name for its characteristics is called "Hydroxynaphthalene Disulfonic Acid", highlighting its hydroxy-containing characteristics.
As for the trade names used in the market, there are also differences. There are references to efficacy, and the name is "high-efficiency sulfonated naphthalene agent", which means that this product has good performance in sulfonation-related applications. There are also applications from the field, calling it "printing and dyeing special naphthalene sulfonic acid", because it is widely used in the printing and dyeing industry and has a significant effect. This is due to industry needs and habits, so they have become different names, but they all refer to this 4-hydroxynaphthalene-2,7-disulfonic acid.

Safety & Operational Standards

4-Hydroxynaphthalene-2,7-disulfonic acid is crucial to safety and operating standards, and should be discussed in detail.
When preparing, all raw materials must be used according to the exact amount, and there must be no error at all. The equipment involved must be clean and dry to prevent impurities from mixing in and causing the product to be impure. The temperature and humidity of the reaction environment must also be strictly controlled. If the temperature is too high, it may cause the reaction to speed up and cause danger; if it is too low, the reaction will be slow and time-consuming.
In the operation room, good ventilation must be made, because harmful gases may escape during the reaction. The operator is in front of complete protective equipment, such as protective clothing, gloves, goggles, etc., to guard against possible hazards.
There are also rules for product storage. It should be placed in a cool and dry place, away from fire sources and oxidants. If it is mixed with other things, or biochemical reactions, it will endanger safety.
When taking it, the action should be slow to avoid dust. Weighing instruments need to be accurately calibrated to ensure that the dosage is correct.
During transportation, the package should be solid and stable to prevent package damage caused by bumps and collisions. And the transportation environment should also conform to its characteristics and avoid high temperature and humidity.
All these safety and operating standards are to ensure the safety of personnel and ensure the quality of products. The operator should keep it in mind, follow it strictly, and not be slack in the slightest.

Application Area

4-Hydroxynaphthalene-2,7-disulfonic acid has a wide range of uses. In the dyeing and weaving industry, it can be used as a raw material for dyes, and the color of the dyeing aids is bright and long-lasting, making the color of the fabric last for a long time. In chemical preparations, it can be used as a reaction aid, promoting many chemical reactions to run smoothly and efficiently. In the field of scientific research, it is an important reagent, assisting researchers in exploring the properties of substances and the principles of analytical reactions. It is crucial in industrial production and academic research, such as in ships and seas, helping various fields to move forward steadily, so as to achieve many exquisite works, and is indispensable to the industry.

Research & Development

In the field of chemical industry, new things emerge one after another, and there are 4-Hydroxynaphthalene-2, 7-Disulphonic Acid, which is what our generation has studied with great dedication. Its nature is unique, and in various experiments, it has repeatedly appeared wonderful.
We explore day and night, using ancient methods and new techniques to understand its essence and expand its effectiveness. At the beginning, we only got a glimpse of one or two, and after countless trials, we have made progress. From the selection of raw materials to the control of the process, we are all cautious.
Fortunately, this substance can promote the speed of the process and increase the quality of the product in a specific reaction. However, we have not dared to slack off, knowing that the road ahead is long. It is hoped that with unremitting efforts, it will be able to shine in the fields of medicine and materials, and contribute to the development of the industry, so that this research result will eventually become a great cause and benefit everyone.

Toxicity Research

The chemical industry is related to people's livelihood, and the toxicity study of the product is particularly important. Today there are 4 - Hydroxynaphthalene - 2,7 - Disulphonic Acid. The toxicity of this substance should not be ignored.
If you want to study its toxicity, you must follow scientific methods. Observe its chemical structure, explore its interaction with things, and observe its response in living bodies. Or take animals and feed them a quantitative amount of the product, observe its diet, activities, and physiological signs. If there is a sign of malaise or disease, it will prove that its toxicity exists.
Also think that if this substance flows in nature, it is in contact with water, soil, and plants, and the changes that occur should also be carefully observed. It may cause vegetation damage and soil transformation, endangering the ecological peace. Therefore, between its production and consumption, strict regulations should be set to prevent its overflow, so as to ensure the safety of all living beings and the integrity of the ecology. The study of toxicity is actually the main responsibility of the chemical industry and cannot be ignored.

Future Prospects

Guanfu 4 - Hydroxynaphthalene - 2,7 - Disulphonic Acid This product is gradually emerging in today's chemical research. Although it is known to the world, it is only the beginning, but our generation will look at it with the perspective of the researcher and see its future, which is quite grand.
It covers its unique structure and different properties, or it can be used in various fields of chemical industry to open up new paths and explore new territories. In the dyeing and weaving industry, it can make exquisite colors, and the color fastness is excellent, making the fabric look eternal; in the road of medicine, or for the creation of new agents, it can heal all kinds of diseases and save patients from pain.
Although the road ahead is long and the geometry is unknown, our research heart is like a torch, and we hope to unremitting exploration, uncover its mysterious curtain, and develop its endless potential. Make this thing in the future world, for the well-being of mankind, build unparalleled achievements, draw magnificent pictures, and live up to the expectations of the times with the brilliance of Changhua learning and research.

Frequently Asked Questions

4-Hydroxynaphthalene-2, what is the chemical structure of 7-Disulphonic Acid?

4-Hydroxynaphthalene-2,7-disulfonic acid, among its molecules, the naphthalene ring is the core structure, and the naphthalene ring is formed by the combination of two fused benzene rings. At position 4 of the naphthalene ring, there is a hydroxyl group (-OH) connected, and the hydroxyl group is covalently connected by hydrogen atoms and oxygen atoms, which has a certain polarity and can participate in many chemical reactions, such as esterification and substitution. At position 2 and position 7 of the naphthalene ring, there are sulfonic acid groups (SO-H) respectively. The sulfonic acid group is composed of a sulfur atom, three oxygen atoms and a hydroxyl group, in which the sulfur atom is connected to the naphthalene ring. The sulfonic acid group is quite active, its acidity is strong, and it is easy to ionize hydrogen ions in water, which endows the compound with good water solubility. In general, 4-hydroxynaphthalene-2,7-disulfonic acid has important uses in many fields, such as dye synthesis and chemical analysis, due to the rigid structure endowed by the naphthalene ring and the chemical activity and characteristics of hydroxyl and sulfonic acid groups.

4-Hydroxynaphthalene-2, 7-Disulphonic Acid is used in which areas

4-Hydroxynaphthalene-2,7-disulfonic acid, this substance has a wide range of uses and has extraordinary applications in many fields.
In the field of dyes, it is an important intermediate. Through specific chemical reactions, it can be converted into various colorful dyes. These dyes have bright color and good fastness, and are widely used in the fabric printing and dyeing industry. Whether it is natural fibers such as cotton and linen, or synthetic fibers such as polyester and nylon, dyes made from 4-hydroxynaphthalene-2,7-disulfonic acid can be used to dye fabrics, giving them rich and diverse colors and satisfying people's pursuit of aesthetics for clothing and home textiles.
In the field of medicine, it also has certain value. Due to its unique chemical structure, it can be used as a key raw material for the synthesis of certain drugs. Studies have found that some of the compounds synthesized on its basis have potential therapeutic effects on specific diseases. By ingeniously combining with other chemicals, drug molecules with specific pharmacological activities can be prepared, contributing to human health.
In the field of chemical synthesis, 4-hydroxynaphthalene-2,7-disulfonic acid is often used as a synthetic raw material for functional materials. For example, in the preparation of some high-performance polymers, the addition of an appropriate amount of 4-hydroxynaphthalene-2,7-disulfonic acid can effectively improve the properties of the polymer, such as improving its thermal stability, mechanical strength and chemical resistance. This makes the prepared polymers widely used in high-end fields such as aerospace and automobile manufacturing, and helps the development and progress of related industries.
In summary, although 4-hydroxynaphthalene-2,7-disulfonic acid is a chemical substance, its application in many important fields such as dyes, medicine and chemical synthesis has greatly promoted the development of related industries and has far-reaching impact on human life and production.

4-Hydroxynaphthalene-2, What are the physical properties of 7-Disulphonic Acid?

4-Hydroxynaphthalene-2,7-disulfonic acid, this substance has different properties and is very interesting. Its shape is mostly in the shape of a powder, and its color is often white to light yellow. Looking at it, the texture is delicate, like a soft frost.
When it comes to solubility, it dissolves quite well in water, just like ice and snow entering the flow, quietly dissipating and turning into a uniform liquid phase. This property is due to the hydrophilicity of the sulfonic acid group, which makes it blend with water. However, in organic solvents, such as ethanol and ether, its solubility is much inferior, and it is difficult to melt. It is like oil and water, which are distinct.
As for stability, 4-hydroxynaphthalene-2,7-disulfonic acid is quite stable under normal temperature, can maintain its properties, and is not easy to mutate. However, in case of high temperature roasting, or the invasion of strong acids and alkalis, its structure will be easily damaged, just like a strong city encountering strong bandits, it is inevitable to collapse. High temperature can cause chemical bonds in molecules to break, and strong acids and alkalis can cause changes in sulfonic acid groups, making the original properties unrecognizable.
In addition, its acidity is also a significant physical property. The sulfonic acid group gives this product a strong acidity, which can ionize hydrogen ions in solution, such as a warrior's sword, showing its lively chemical activity. This acidity not only affects its own chemical reactions, but also plays a key role in catalysis, pH regulation, and other aspects in many industrial and scientific fields, just like an important role on the stage.

4-Hydroxynaphthalene-2, what are the preparation methods of 7-Disulphonic Acid

The preparation method of 4-hydroxynaphthalene-2,7-disulfonic acid, through the ages, many parties have their own wonderful methods.
In the past, naphthalene was mostly used as the starting material, and it was prepared through two steps of sulfonation and hydroxylation. The first is sulfonation, with concentrated sulfuric acid or fuming sulfuric acid as the sulfonating agent, and naphthalene is co-heated with it. During sulfonation, temperature, sulfonating agent dosage and reaction time are all key. If the temperature is high, the reaction speed will increase, but the side reactions will also increase; if the temperature is low, the reaction will be slow, or the yield will not be high. If the amount of sulfonating agent is sufficient, it can promote the complete sulfonation, but if the excess is too high, the cost will increase and the subsequent treatment will be complex. The reaction time needs to be precisely controlled
After the sulfonation is completed, the derivative of naphthalenesulfonic acid is obtained, followed by hydroxylation. Usually alkali metal hydroxide or carbonate is used as the reagent, and the reaction is heated in a specific solvent. In this step, the concentration of the reagent, the reaction temperature and time also affect the product. The concentration of the reagent is appropriate, which can ensure the smooth hydroxylation; if the temperature is too high or the product is decomposed, the reaction is difficult if it is too low. Only when the time is properly controlled can high-purity 4-hydroxynaphthalenes-2,7-disulfonic acid be obtained.
At present, there are also people who use naphthol as the raw material. First, naphthol is sulfonated, and then the sulfonic acid is introduced through a specific oxidation or substitution reaction based on a specific position. In this way, due to the higher activity of naphthol than naphthol, some reaction conditions can be slightly slower, but the cost of raw materials may be different. And the separation and purification process after each step of the reaction is also critical, which affects the purity and yield of the product. Common purification methods include recrystallization, column chromatography, etc., which are selected according to the characteristics of the product and the properties of impurities.

4-Hydroxynaphthalene-2, what is the market outlook for 7-Disulphonic Acid?

4-Hydroxynaphthalene-2,7-disulfonic acid is widely used in the field of chemical industry. In the dye industry, it is often a key raw material for the synthesis of special dyes. Due to its unique molecular structure, it can endow dyes with excellent color, fastness and other characteristics, making the dye bright and lasting.
Looking at its market prospects, with the development of downstream industries such as textiles, printing and dyeing, the demand for high-quality dyes is increasing, and the demand for 4-hydroxynaphthalene-2,7-disulfonic acid, as an important cornerstone of dye synthesis, is also expected to rise.
Furthermore, in the field of medicine and chemical industry, it may play a role in the synthesis of some pharmaceutical intermediates. With the advancement of pharmaceutical research and development, if it can develop new uses in this field, the market space will be broader.
However, its market also faces challenges. The production process requires fine chemical technology, and some enterprises may find it difficult to ensure stable product quality due to technical limitations. And environmental protection requirements are becoming stricter, and the waste treatment generated in the production of this substance needs to meet high standards, which will undoubtedly increase the production cost of enterprises.
Overall, the market prospects for 4-hydroxynaphthalene-2,7-disulfonic acid are promising, but companies need to overcome technical and environmental challenges in order to stand out in the market competition and enjoy the dividends of market development.