What are the physical properties of 4-CHLOROFLUOROBENZENE 99% (GC)?

4-Chlorofluorobenzene (content 99% (gas chromatography)), its physical properties are as follows:

This substance is a colorless to light yellow liquid with a unique and irritating odor. The boiling point is about 129-130 ° C. At this temperature, the liquid converts to a gaseous state, and the molecules overcome the interaction force and escape from the liquid surface. The melting point is around -46 ° C. Below this temperature, the substance solidifies from a liquid state to a solid state, and the molecular arrangement tends to be orderly from disorder.

Its density is about 1.22 g/cm ³, which means that the mass of the substance contained in the unit volume is 1.22 grams, which is higher than the density of water. Therefore, if mixed with water, it will sink to the bottom of the water.

4-chlorofluorobenzene is insoluble in water. Due to the presence of benzene rings and chlorine and fluorine atoms in its molecular structure, it has certain hydrophobicity, and it is difficult for water molecules to form effective interactions with it. However, it is soluble in most organic solvents, such as ethanol, ether, acetone, etc., because these organic solvents and 4-chlorofluorobenzene molecules can interact with each other through van der Waals forces and miscible with each other.

In addition, 4-chlorofluorobenzene has a certain degree of volatility. Under normal temperature and pressure, it will slowly evaporate into the air, and the molecules will diffuse from the liquid phase to the gas phase. It also has a certain refractive index, which changes the direction of propagation when light passes through the substance, which can be used for the analysis of the purity and concentration of the substance.

What are the main uses of 4-CHLOROFLUOROBENZENE 99% (GC)?

4-Chlorofluorobenzene, with a content of 99% (determined by gas chromatography), is widely used. In the field of chemical synthesis, it is often used as a key intermediate. As far as the preparation of pesticides is concerned, the synthesis of many high-efficiency insecticides and fungicides depends on their participation in the reaction. Through specific chemical processes, ingeniously combined with other compounds, new substances with excellent insecticidal and bactericidal efficacy are derived, protecting crops from pests and pathogens and ensuring agricultural harvest.

In the field of pharmaceutical creation, it also plays an important role. Many drug molecules with special pharmacological activities are constructed, and 4-chlorofluorobenzene is an indispensable raw material. Its unique chemical structure endows the reaction products with specific properties, which helps to develop therapeutic drugs for specific diseases, and makes great contributions to human health and well-being.

In the field of materials science, it has also made a name for itself. Or it can be used to synthesize special polymer materials. After polymerization and other reactions, the materials have special properties such as excellent chemical corrosion resistance and heat resistance. In high-end fields such as aerospace and electronics, it can meet the strict requirements of special environments for materials.

And because of its certain volatility and chemical activity, it is also used in the preparation of some fine chemicals such as fragrances, coating additives, etc., giving products unique properties and quality.

4-CHLOROFLUOROBENZENE 99% (GC) What to pay attention to when storing

4-Chlorofluorobenzene, with a purity of 99% (determined by gas chromatography). When storing these chemical substances, many matters cannot be ignored.

First, pay attention to the temperature and humidity where it is located. Although the 4-chlorofluorobenzene property is relatively stable, the temperature is too high, or its volatilization may increase and the loss will increase; if the humidity is too large, impurities may be mixed in and affect the purity. Therefore, it is advisable to store in a cool and dry place. The temperature is preferably 15 to 25 degrees Celsius, and the humidity should be controlled at 40% to 60%.

Second, the storage place must be well ventilated. 4 - If chlorofluorobenzene volatilizes in a closed space, its gas accumulates, one may affect the surrounding air quality, and the two may be at risk of ignition and explosion. Good ventilation can make the volatile gas dissipate in time to ensure environmental safety.

Third, this substance should be separated from oxidants, acids, bases and other substances. 4 - Chlorofluorobenzene is chemically active, encounters with oxidants, or has a violent oxidation reaction; contact with acids and bases may also trigger chemical reactions, cause material deterioration, and even cause dangerous accidents.

Fourth, the packaging must be tight. If the packaging is damaged, 4 - chlorofluorobenzene is volatile and leaks easily, which not only causes material loss, but also may pollute the environment and endanger personal safety. The packaging materials used must be resistant to chemical corrosion and can be effectively sealed to prevent leakage.

Fifth, the storage place should be equipped with obvious warning signs. Inform people who come and go that 4-chlorofluorobenzene is stored here, which is dangerous to a certain extent. Non-professionals should not approach it. At the same time, the place should be equipped with corresponding emergency treatment equipment and materials, such as fire extinguishers, adsorbents, etc., for emergencies.

What is the production method of 4-CHLOROFLUOROBENZENE 99% (GC)?

The preparation of 4-chlorofluorobenzene (99% content (gas chromatography)) has been well studied throughout the ages. In the past, the preparation method often began with the corresponding halogenated aromatic hydrocarbons. Based on fluorobenzene, the 4-chlorofluorobenzene can be obtained by chlorination.

First take an appropriate amount of fluorobenzene and place it in a special reactor. The kettle is made of corrosion-resistant materials, which can resist the erosion of various chemicals in the reaction. The environment in the kettle must be clean and oxygen-free to prevent impurities from disturbing the reaction process. Fluorobenzene is established, and an appropriate amount of chlorinated reagents, such as chlorine gas or chlorination agents, are added. This chlorinating agent is selected as the one with moderate activity. If the activity is too strong, it may cause excessive chlorination; if the activity is too weak, the reaction will be slow.

When reacting, its temperature needs to be controlled. At the beginning, the temperature is slowly increased, so that the substances in the kettle are gradually activated, and the movement of molecules intensifies, causing them to collide and react with each other. When it is raised to a suitable temperature, it is about a certain range (depending on the specific reaction conditions), to maintain this temperature, so that the reaction can proceed smoothly. In this process, the control of temperature is the key, and a slight deviation may cause the product to be impure or the reaction rate to be greatly affected.

When the reaction is carried out, it is also necessary to pay attention to the stirring of the reaction system. With a special stirrer, stir at a uniform speed to fully mix fluorobenzene and chlorinated reagents, so that the reaction occurs uniformly, without excessive or insufficient local reaction. And the rate of stirring needs to be adjusted according to the reaction process.

When the reaction is over, the product is mixed with unreacted raw materials, by-products, etc. Then the method of separation is used, often distillation is the first. Using the difference in the boiling point of each substance, heat the mixture to vaporize the low boiling point first, and then condense it into a liquid, and separate it from the high boiling point. After distillation, the product still contains some impurities, and then is refined by extraction, crystallization, etc. When extracting, choose a suitable extractant to dissolve the impurities in it, and 4-chlorofluorobenzene remains in the other phase. The crystallization method allows 4-chlorofluorobenzene to be precipitated in a crystalline state for further purification. After these steps, 4-chlorofluorobenzene with a content of 99% (gas chromatography) can be obtained.

4-CHLOROFLUOROBENZENE 99% (GC) is an environmental risk

4-Chlorofluorobenzene, with a content of 99% (determined by gas chromatography). This substance is in the environment and may pose a risk. Looking at its characteristics, 4-chlorofluorobenzene is volatile and can diffuse in the atmosphere. If it escapes into the air, if inhaled by humans, it may cause respiratory discomfort and even damage the lungs. And it can affect the composition and quality of the atmosphere under conditions such as light or participate in photochemical reactions.

In water, although 4-chlorofluorobenzene has limited solubility, it can still enter rivers, lakes and seas through surface runoff. Contact with aquatic organisms may interfere with its physiological functions, such as affecting the respiration and reproduction of fish. However, it is difficult to degrade in water, can persist for a long time, and is tired of aquatic ecosystems.

As for soil, 4-chlorofluorobenzene infiltrates or adsorbs on soil particles, which affects the activities and community structure of soil microorganisms, and then changes the nutrient cycle of plant growth and hinders the normal development of plants.

Therefore, 4-chlorofluorobenzene is volatile and refractory, and has potential hazards in environmental media such as air, water, and soil. The risk to the environment should not be underestimated.