Benzene, Pentachloro-
Linshang Chemical
HS Code |
421674 |
Chemical Formula | C6HCl5 |
Molar Mass | 250.33 g/mol |
Appearance | Colorless to pale yellow solid |
Odor | Pungent, unpleasant odor |
Density | 1.68 g/cm³ |
Melting Point | 82 - 84 °C |
Boiling Point | 276 - 277 °C |
Solubility In Water | Insoluble |
Solubility In Organic Solvents | Soluble in benzene, chloroform, ether |
Vapor Pressure | Low vapor pressure at room temperature |
Flash Point | 154 °C |
Stability | Stable under normal conditions |
As an accredited Benzene, Pentachloro- factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
Packing | 100 - gram bottle packaging for Pentachloro - benzene chemical. |
Storage | Pentachlorobenzene should be stored in a cool, dry, well - ventilated area away from sources of ignition and heat. It should be kept in tightly sealed containers, preferably made of materials resistant to its corrosive nature. Store it separately from oxidizing agents and incompatible substances to prevent dangerous reactions. Adhere to local safety regulations for chemical storage. |
Shipping | Pentachlorobenzene is a hazardous chemical. Shipping requires strict compliance with regulations. It must be in properly labeled, leak - proof containers, transported by carriers authorized for such hazardous substances, ensuring safety during transit. |
Competitive Benzene, Pentachloro- 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.
We will respond to you as soon as possible.
Tel: +8615365006308
Email: info@alchemist-chem.com


As a leading Benzene, Pentachloro- supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
Its melting point is quite high, about 140.5 degrees Celsius. At this temperature, the state of matter begins to change from solid to liquid. The boiling point is also not low, up to 276.5 degrees Celsius. At this temperature, it turns into a gaseous state.
PeCB has a density greater than that of water. If placed in water, it will sink to the bottom of the water. It has little solubility in water and is almost insoluble. Due to its molecular structure characteristics, it is difficult to dissolve with water molecules.
Although it is in organic solvents, it has good solubility. Organic solvents such as ether, chloroform, and benzene can all be mixed with it. Due to the interaction between the molecules of organic solvents and PeCB molecules, it is easy to dissolve with each other.
PeCB is volatile to a certain extent and can be slowly dissipated in the air. Its smell is specific, and people can smell it and feel pungent and uncomfortable. And this substance is toxic. Excessive contact or inhalation can endanger the health of organisms. It is not easy to degrade in the environment and can be retained for a long time, causing environmental pollution.
PeCB has high chemical stability. Due to the conjugate system of the benzene ring, its structure is relatively stable, and it is difficult to occur many chemical reactions under common conditions. However, under strong oxidizing agents, under specific conditions, the benzene ring may also be oxidized, and its conjugate structure is destroyed, and then it changes.
Its halogenated properties, because there are already five chlorine atoms attached to the benzene ring, it is difficult to perform halogenation reactions. Because the chlorine atom is an electron-absorbing group, the electron cloud density of the benzene ring is reduced, and the electrophilic substitution reaction activity is weakened.
In the nucleophilic substitution reaction, although the electron cloud density of the benzene ring is low, it may also occur under specific reagents and conditions. In case of strong nucleophilic reagents, the chlorine atoms on the benzene ring may be replaced, but this process requires strict conditions.
In terms of solubility, pentachlorobenzene is insoluble in water, because it is a non-polar molecule, and water is a polar solvent. According to the principle of "similar miscibility", the two are difficult to dissolve. However, it is soluble in some organic solvents, such as carbon tetrachloride, chloroform and other non-polar or weakly polar solvents.
has high thermal stability and requires a higher temperature to decompose. Under high temperature conditions, or reactions such as cracking occur, chlorine-containing small molecules and carbonaceous products are generated. The chemical properties of PeCB are determined by its benzene ring structure and the substitution of chlorine atoms. Many reactions require specific conditions to occur, which are all important chemical properties of PeCB.
In the industrial field, pentachlorobenzene can be used to make special solvents. This kind of solvent has unique solubility and can dissolve many insoluble substances. In the organic synthesis reaction, it helps the reactants to mix and melt, and promotes the progress of the reaction, just like a boat helping to navigate a river, making the synthesis road smoother.
In addition, pentachlorobenzene is also an intermediary for the preparation of specific pesticides. In the past, pests were frequent, and the agricultural mulberry industry was deeply disturbed by them. The pesticides made of pentachlorobenzene can effectively eliminate pests and ensure the safety of crops. Based on it, through subtle transformations, the obtained medicine can precisely act on the physiology of pests, or prevent their feeding, or disrupt their reproduction, and protect farmland crops from wind, rain and insect pests.
And in terms of material production, PeCB also has its functions. It can contribute to the synthesis of special polymer materials. Through complex polymerization reactions, PeCB is integrated into the polymer structure, giving the material special properties, such as enhancing its heat resistance and corrosion resistance, so that the material can be durable in high temperature and harsh environments, such as a strong shield guardian.
However, it should be noted that pentachlorobenzene is toxic. Although its use is important, it should be used with caution in the past to prevent its harm to life, pollution and the environment. Those who handle this product should abide by strict regulations and implement careful laws to avoid its disadvantages.
In the soil, PeCB remains for a long time, which can cause soil quality to deteriorate. After covering it into the soil, it will affect the structure and function of soil microbial community. Microorganisms play a key role in soil material circulation and nutrient transformation. Under the interference of PeCB, microbial activity is inhibited, and processes such as nitrogen transformation and organic matter decomposition are also hindered, which in turn affects plant growth. Plant roots are in contaminated soil, and their ability to absorb nutrients and water may be weakened, causing plants to be short and stunted, and the yield and quality of agricultural products will also decrease.
In the aquatic environment, PeCB can enter rivers, lakes and seas through runoff. Although its solubility in water is low, it is easily adsorbed on suspended particles and diffuses with water flow. This not only harms aquatic organisms, but also enriches through the food chain, threatening human health. Aquatic organisms such as fish and shellfish may experience abnormal physiological functions after exposure to PeCB, affecting growth, reproduction, and even death. If humans eat contaminated aquatic products, PeCB will accumulate in the body, damage the liver, kidneys and other organs, and increase the risk of cancer.
In the atmospheric environment, PeCB can evaporate into the air and be transported over long distances, expanding the scope of pollution. Human inhalation of air containing PeCB, the respiratory tract, lungs bear the brunt, or cause respiratory inflammation, breathing difficulties and other symptoms. And it reacts photochemically in the atmosphere, or generates other harmful derivatives, further deteriorating air quality.
Therefore, PeCB has significant negative effects on various environmental media, which is related to ecological security and human well-being, and urgently needs proper control and governance.
To make pentachlorobenzene, benzene is often used as the starting material and obtained by chlorination. In the past, benzene and chlorine were mostly reacted under specific conditions. First set up a reaction kettle, and put an appropriate amount of benzene into the kettle and introduce chlorine gas. However, this reaction requires a suitable catalyst. In the past, the commonly used catalysts, such as iron filings or their halides, are preferably ferric chloride. When ferric chloride is added, it can promote the reaction of benzene and chlorine to occur more easily. When the
reaction, the chlorine molecules dissociate the chlorine atoms under the action of the catalyst, and the active chlorine atoms attack the benzene ring. The π electron cloud of the benzene ring attracts the chlorine atoms, and then the substitution reaction After the first chlorine atom replaces the hydrogen atom on the benzene ring, monochlorobenzene is formed. The blunt action of monochlorobenzene due to the chlorine atom makes it slightly more difficult to replace benzene again. However, with sufficient chlorine and the continuous action of the catalyst, monochlorobenzene will continue to react with chlorine, gradually generating dichlorobenzene, trichlorobenzene, tetrachlorobenzene, and finally pentachlorobenzene.
During the reaction process, temperature control is very critical. If the temperature is too low, the reaction rate will be slow and take a long time. If the temperature is too high, it is easy to increase side reactions and generate unnecessary polychlorinated substitutes or other by-products. Generally speaking, the chlorination reaction temperature should be maintained in a moderate range, about ten degrees Celsius. At the same time, the stirring of the reaction system cannot be ignored. Good stirring can make the reactants fully contact, ensure the uniform progress of the reaction, and improve the yield of PeCB. After the reaction is completed, it needs to go through the steps of separation and purification, such as distillation and extraction, to obtain pure PeCB products.

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