Sodium 4-Chloro-3-Nitrobenzenesulfonate
Linshang Chemical
HS Code |
729294 |
Chemical Formula | C6H3ClNNaO5S |
Molar Mass | 271.6 |
Appearance | Yellow - brown crystalline powder |
Solubility In Water | Soluble |
Ph Of Aqueous Solution | Neutral to slightly alkaline |
Melting Point | Above 300 °C (decomposes) |
Density | Approx. 1.8 g/cm³ |
Stability | Stable under normal conditions |
Hazard Class | Irritant |
Main Use | Intermediate in dye synthesis |
As an accredited Sodium 4-Chloro-3-Nitrobenzenesulfonate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
Packing | 500g of Sodium 4 - chloro - 3 - nitrobenzenesulfonate in a sealed plastic bag. |
Storage | Sodium 4 - chloro - 3 - nitrobenzenesulfonate should be stored in a cool, dry, well - ventilated area, away from heat sources and open flames. Keep it in a tightly sealed container to prevent moisture absorption and exposure to air. Store separately from incompatible substances like oxidizing agents and reducing agents to avoid potential chemical reactions. |
Shipping | Sodium 4 - chloro - 3 - nitrobenzenesulfonate should be shipped in tightly sealed containers, protected from moisture and heat. It may require special handling as a chemical, following relevant regulations for safe transportation. |
Competitive Sodium 4-Chloro-3-Nitrobenzenesulfonate prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615365006308 or mail to info@alchemist-chem.com.
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Tel: +8615365006308
Email: info@alchemist-chem.com


As a leading Sodium 4-Chloro-3-Nitrobenzenesulfonate supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
In the field of organic synthesis, it is a key intermediate. It can participate in many organic reactions, and through specific reaction steps, it is converted into a variety of organic compounds with specific functions. For example, nitro groups can be converted into amino groups through reduction reactions to obtain amino-containing benzenesulfonic acid derivatives, which have important uses in the pharmaceutical, pesticide and materials industries. In pharmaceutical synthesis, it may lay the foundation for the preparation of specific drug molecular structures; in pesticide synthesis, it may help to create new and efficient pesticides.
Furthermore, in the manufacture of some fine chemical products, 4-chloro-3-nitrobenzenesulfonic acid sodium also plays an important role. In the synthesis of surfactants, or participate in the preparation of specific structural surfactants, such surfactants may have unique interfacial activities and have their uses in daily chemicals, coatings and other fields. In daily chemical products, it can improve the emulsification and dispersion performance of products; in coatings, it may help to improve the dispersion and coating performance of pigments. In short, it is an indispensable chemical raw material in many industrial fields and is of great significance to promote the development of related industries.
Looking at its properties, it is mostly white to light yellow crystalline powder at room temperature. This form is easy to store and transport, and it is easy to measure and use. In various chemical reactions, the dosage can be precisely controlled to ensure the smooth progress of the reaction.
In terms of solubility, the substance is easily soluble in water. This property allows it to disperse rapidly and uniformly in the reaction or application of aqueous solution systems, which is conducive to participating in various chemical changes. For example, as an additive for some organic synthesis reactions, it can be fully contacted with other reactants by virtue of its good water solubility to promote the efficient occurrence of reactions.
Melting point is also one of the key physical properties. Although the specific melting point value may vary due to factors such as preparation processes, it is roughly within a certain range. The level of melting point is related to its physical state change under different temperature environments, which is of great significance to the setting of storage and use temperature conditions. If the temperature is higher than the melting point, the substance will change from solid to liquid, or affect its original physical and chemical properties and application properties.
In addition, its density also has certain characteristics. The appropriate density is conducive to the distribution and mixing in a specific system. For example, in some systems that need to be evenly dispersed, the appropriate density can make it better integrated with other substances and play its due role.
And its odor is weak, which can reduce odor interference to the operating environment and personnel during actual operation and use, reduce the adverse impact on the air quality of the workplace, create a relatively comfortable working atmosphere for the operator, and also help to ensure the quality of the product. Avoid odor problems affecting the use experience of related products.
Nitro has strong electron absorption, which can reduce the density of the electron cloud of the benzene ring and affect the electrophilic substitution reaction activity; chlorine atoms also have electron absorption induction effects, but the degree of influence on the electron cloud of the benzene ring is different from that of nitro groups. The sulfonic acid group is acidic, in the form of a salt, exists as an ionic state, binds to sodium ions, and maintains a stable structure by means of ionic bonds.
In common environments, without strong oxidizing agents, reducing agents or specific reaction conditions, sodium 4-chloro-3-nitrobenzene sulfonate can maintain a relatively stable state. And the groups in the molecule interact to build a relatively stable system, so its chemical properties generally tend to be stable.
First take an appropriate amount of chlorobenzene and place it in the reactor. Chlorobenzene, a colorless and transparent liquid with a special smell, is an important raw material for organic synthesis. In this kettle, slowly add a mixture of concentrated sulfuric acid and fuming sulfuric acid. Sulfuric acid is also a strong acid, which is highly corrosive and water-absorbing. Fuming sulfuric acid is a strengthener of sulfuric acid. When adding this mixture, the temperature should be strictly controlled, and it should be slowly dripped at low temperature to prevent the reaction from being too violent. This step is to make chlorobenzene sulfonate reaction, sulfuric acid sulfonic acid group (-SO-H) replaces the hydrogen atom on the chlorobenzene ring to form chlorobenzenesulfonic acid.
After the sulfonation reaction is completed, the reaction mixture is cooled. Then, a mixed acid composed of concentrated nitric acid and concentrated sulfuric acid is added. Nitric acid is highly oxidizing and corrosive. After the mixed acid is added, the reaction temperature needs to be carefully adjusted to further nitrate the chlorobenzenesulfonic acid. The nitro group of nitric acid (-NO -2) replaces the hydrogen atom at a specific position on the benzene ring to form 4-chloro-3-nitrobenzenesulfonic acid. This step requires strict temperature requirements. If the temperature is too high or too low, it will affect the yield and purity of
After 4-chloro-3-nitrobenzenesulfonic acid is obtained, mix it with sodium hydroxide solution. Sodium hydroxide is a strong base, and the hydrogen atom on the sulfonic acid group is replaced by sodium ions to obtain sodium 4-chloro-3-nitrobenzenesulfonic acid. At the end of the reaction, after separation and purification, such as crystallization, filtration, drying and other steps to remove impurities, a pure 4-chloro-3-nitrobenzenesulfonic acid product can be obtained.
This preparation method requires careful operation in each step. The proportion of raw materials, reaction temperature, time and other factors need to be carefully controlled to obtain the ideal product.
Its properties are relatively stable, in case of open flame, hot topic, there is still the risk of explosion. Therefore, when storing, choose a cool, dry and well-ventilated place, away from fire and heat sources. The warehouse temperature should be controlled in a suitable range to prevent danger caused by excessive temperature. And it should be stored separately from oxidizing agents, reducing agents, acids, alkalis, etc., and must not be mixed to avoid danger due to mutual reaction.
When transporting, the same should not be slack. Make sure that the container is well sealed and there is no risk of leakage. Transportation vehicles should be equipped with the appropriate variety and quantity of fire fighting equipment and leakage emergency treatment equipment. During driving, it is necessary to prevent exposure to the sun, rain, and high temperature. Transportation should be carried according to the specified route, and do not stop in residential areas and densely populated areas. When loading and unloading, it should also be light and unloaded. It is strictly forbidden to drop, touch, and collide to avoid damage to the container and material leakage.
Only when all aspects of storage and transportation are treated with caution and in accordance with regulations can the safety of sodium 4-chloro-3-nitrobenzene sulfonate be guaranteed and dangerous accidents be avoided.

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