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1,2-Dibromoethane

Qiji Chemical

1,2-Dibromoethane
Specifications

HS Code

551657

Chemical Formula C2H4Br2
Molar Mass 187.86 g/mol
Appearance Colorless, oily liquid
Odor Sweet, chloroform - like odor
Density 2.179 g/cm³ at 20 °C
Melting Point -35.3 °C
Boiling Point 131.6 °C
Solubility In Water 0.44 g/100 mL at 20 °C
Vapor Pressure 1.6 kPa at 20 °C
Flash Point 44 °C
Refractive Index 1.5386 at 20 °C
Packing & Storage
Packing 1,2 - Dibromoethane packaged in 5 - liter glass bottles for safe storage and transport.
Storage 1,2 - Dibromoethane should be stored in a cool, well - ventilated area, away from heat and ignition sources. Keep it in a tightly closed container made of materials resistant to corrosion, such as glass or specific plastics. Store it separately from oxidizing agents, strong bases, and reactive metals to prevent potential chemical reactions.
Shipping 1,2 - Dibromoethane is a hazardous chemical. Shipping must comply with strict regulations. It should be in properly labeled, leak - proof containers, transported by approved carriers following safety protocols to prevent environmental and health risks.
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1,2-Dibromoethane 1,2-Dibromoethane
General Information
Historical Development
1,2-Dibromoethane is also a chemical substance. Its origin can be traced back to the past. In the past, chemists explored the physical properties, and gradually improved.
At the beginning, people did not know it, but they did a little inspection of its appearance. The more scientific it is, the deeper the research. The chemists use the new equipment to study its properties.
In the field of engineering, 1,2-dibromoethane was initially used for combustion, hoping to help with combustion. However, if it is used for a long time, the disadvantages are low, and its harmful environment is endangered.
It is because chemists are thinking of new ways to make good use of it and harm it. In November, the method is gradually new, and the use of 1,2-dibromoethane is also improved, which is used in the world and ensures the safety of the environment. Its development process is the spirit of those who do not explore and seek innovation.
Product Overview
1,2-Dibromoethane is also an organic compound. It is a colorless and transparent liquid, volatile, and has a pungent smell.
This compound is often prepared by adding ethylene and bromine. The reaction mechanism is clear and the conditions are controllable, so the yield is quite good.
1,2-dibromoethane is widely used. In the chemical industry, it is an important intermediate for the preparation of many organic materials. For example, when synthesizing certain polymer compounds, it is indispensable. And in agriculture, it was once used as a soil fumigant to remove pests, but due to toxicity, it is now less used.
However, it also has certain hazards. Damage to the human nervous system and respiratory system. In case of accidental contact, rinse with water as soon as possible and seek medical treatment. Therefore, during production and use, safety procedures must be strictly followed to ensure the safety of personnel and the environment.
Physical & Chemical Properties
1,2-Dibromoethane is an organic compound. Its shape is a colorless heavy liquid with a sweet aroma. At room temperature, it is quite stable. Its boiling point is about 131.4 ° C, and its melting point is 9.3 ° C. This substance has a higher density than water, is insoluble in water, and can be miscible with organic solvents such as alcohols, ethers, and chloroform.
1,2-dibromoethane, the presence of bromine atoms endows it with active chemical properties. Due to nucleophilic substitution reactions, bromine atoms are easily replaced by other groups. And because of its carbon-bromine bonds, under suitable conditions, an elimination reaction can occur to form unsaturated hydrocarbons. This compound is widely used in the field of organic synthesis, often as an alkylation reagent, and is also used to prepare a variety of fine chemicals. Its status in the chemical industry cannot be ignored.
Technical Specifications & Labeling
1,2-Dibromoethane is also an important product of the chemical industry. Its technical specifications and identification (product parameters) are the key.
To make this substance, ethylene and bromine are often added. During operation, it is necessary to strictly follow the procedures, control temperature, speed and other parameters. The reaction apparatus must be clean and dry to prevent impurities from disturbing it.
Its label is clearly marked, and the name is "1,2-dibromoethane", listed in the chemical formula C ² H Br ². Remember its properties, colorless heavy liquid, sweet fragrance, toxic and volatile. Detailed physical and chemical parameters, such as melting point - 35 ° C, boiling point 131 ° C. Note its dangerous characteristics, flammable, toxic, users should be careful to ensure safety, follow this specification to make good use of this product.
Preparation Method
1,2-Dibromoethane is also an organic compound. The method of its preparation is related to the raw material and production process, reaction steps and catalytic mechanism.
To make this product, ethylene and bromine are often used as raw materials. In a suitable reaction vessel, ethylene is passed into the bromine solution, and under normal temperature and pressure, or under a slightly warmed state, the addition reaction of the two occurs. The double bond of ethylene is active, and the bromine atom of bromine is combined with it to form 1,2-dibromoethane.
The catalytic mechanism of this reaction, the bromine molecule can be polarized, resulting in positive electricity at one end, attracting the electron cloud of ethylene, and initiating the reaction. The production process needs to control the reaction temperature and rate to prevent side reactions. After the product is collected, it can be purified by distillation, extraction, etc., to obtain pure 1,2-dibromoethane, which can be used in chemical, pharmaceutical and other fields.
Chemical Reactions & Modifications
The industry of chemical industry is related to people's livelihood, and it is wonderful in the change of materials. In today's discussion of 1,2-Dibromoethane, the chemical reaction and variability of its chemical are quite interesting.
In the past, 1,2-Dibromoethane was prepared by the addition reaction of ethylene and bromine. Although this reaction can be formed into its own product, the conditions are harsh, and the toxicity of bromine is strong, and the operation is dangerous.
After that, there were wise people who thought about changes and sought new ways to improve it. With a mild agent, the strong bromine was replaced, and the reaction environment was optimized, making the conditions easy and the danger was greatly reduced. Such a change not only improves the yield, but also is more conducive to safety and environmental protection, and has many benefits. This sincere chemical progress, in response to the needs of the times, improve physical properties, and benefit the country and the people.
Synonyms & Product Names
1,2-Dibromoethane, which is also known by another name. Although ancient chemistry is not as detailed as it is today, it also has names for its analogs.
In the past, although there is no precise modern name, it has also been seen in the exploration of the embryonic form of chemical industry. At that time, it may be called according to its properties and sources. 1,2-dibromoethane, the name of its assimilate may vary depending on the region and the raw materials used.
In the workshop, the craftsman or because of its relationship with the synthesis of raw materials, gave it a different name to distinguish it. Although this name is different from the current scientific name, it refers to this thing. From its reaction characteristics or its appearance, it has formed a unique name over time, which is also a drop in the long river of chemical development, witnessing the change of cognition.
Safety & Operational Standards
Safety and operation specifications for 1,2-dibromoethane
For 1,2-dibromoethane, the chemical substance is also. Its special nature is related to safety and operation standards, and our generation should explain it in detail.
This substance is toxic to a certain extent, and it must strictly follow the procedures when operating. The operator must wear complete protective equipment, such as special gloves, gas masks and protective clothing, to prevent it from touching the skin and inhaling into the body.
The workplace must also be well ventilated to keep the air flowing smoothly and prevent it from accumulating. Install a ventilation device to introduce fresh air into it and drive the gas containing the substance out.
In terms of storage, it should be placed in a cool, dry and well-ventilated place, away from fire and heat sources. The reservoir should be well sealed to prevent leakage. If it is unfortunate to leak, do not panic and dispose of it according to the established procedures. Evacuate unrelated people first, etc. The operator wears professional protective equipment, absorbs and collects the leakage with suitable materials, and then properly disposes of it according to regulations.
Furthermore, during the operation, it is essential to precisely control the dosage and reaction conditions. Familiar with its chemical properties, follow the standard steps to avoid violent reactions or accidents.
All these safety and operating standards are to ensure the safety of personnel, the environment is not damaged, and the smooth progress of experiments or production. Those who handle this substance should be engraved in their hearts, and they should always be careful to obey it, and they should not be slack in the slightest.
Application Area
1,2-Dibromoethane, this substance has a wide range of uses. In the field of chemical industry, it is often a raw material for organic synthesis. With its ability to participate in many chemical reactions, various important compounds can be prepared.
In agriculture, it was used as a soil fumigant to eliminate pests and bacteria and protect crop growth. However, due to its certain toxicity, it is less used today.
In industrial production, it can be used as a solvent to help dissolve a variety of substances and facilitate the production process. And in the field of pharmaceutical research, it is also occasionally involved, or as an intermediate, to help the development of new drugs. Although it has various uses, when using it, it is necessary to pay attention to safety, weigh the pros and cons, and ensure that it is used in a beneficial way.
Research & Development
Modern chemistry has advanced, and many new qualities have been discovered. 1,2-Dibromoethane is also the object of our research. We have carefully observed its physical properties and chemical properties, and explored its synthesis method. After months of experiments, we have initially obtained a good synthesis path, but the yield has not been ideal.
We are also thinking about its application and expansion. This substance may be of great use in the industrial field. Although the road ahead is still long and there are many difficulties, we will continue to study it. Looking forward to the future, we can improve the synthesis method, improve the yield, and explore its properties more deeply, so that 1,2-Dibromoethane can be used in various industries to greatly develop its capabilities, so as to help the progress of science and technology, the prosperity of industry, and the well-being of future generations.
Toxicity Research
In recent years, Yu devoted himself to the study of chemical substances, especially the toxicity of 1,2-Dibromoethane. This substance, like a colorless liquid, has a sweet aroma, but it is hidden and poisonous.
At the beginning, in the experimental room, I observed its response to various things. Place it with the active agent and observe its change. Not long after, I saw a violent reaction and a strange appearance.
After that, I tested it on white mice. The mice were fed food containing this substance, and the daily amount was fixed. After a few days, the white mice gradually showed fatigue, the diet was greatly reduced, and the body's resistance also decreased.
The way it enters the body is also analyzed, either by breathing or through the skin, it can enter the body. After entering the body, it disrupts the physiological order and damages the ability of the organs.
In summary, 1,2-Dibromoethane is highly toxic. When it is produced and used, it must be strictly controlled to ensure the safety of the living.
Future Prospects
1,2 - Dibromoethane is an important chemical substance. In the future, it may have more subtle applications in the field of chemical synthesis. With the evolution of science and technology, the improvement of its purity and the optimization of the synthesis process are expected to reach new heights.
We can hope that after in-depth research, we can find a greener and more efficient preparation path to reduce its impact on the environment. In the research and development of new materials, 1,2 - Dibromoethane may become a key raw material, giving rise to many new materials with excellent performance, contributing to industrial progress, outlining a beautiful blueprint for future development, and helping various industries move towards new glories.
Frequently Asked Questions
What are the main uses of 1,2-dibromoethane?
1,2-Dibromoethane, its main uses are as follows:
This substance is often used in organic synthesis and provides key raw materials for the preparation of many fine chemicals. In the field of synthetic medicine, it can be used as an intermediate to participate in the construction of a variety of drug molecules. In the field of pesticide manufacturing, it can help synthesize pesticide ingredients with specific insecticidal and herbicide effects.
In industry, 1,2-dibromoethane is an important raw material for the preparation of important chemical products such as high-purity ethylene and polyethylene. It participates in the reaction, which can optimize the reaction path and improve the purity and yield of the product.
At the same time, 1,2-dibromoethane is also used as a raw material for gasoline seismic additives. In the past, in order to improve the anti-explosion performance of gasoline, it was often added to gasoline. Although its application in gasoline is decreasing due to environmental protection considerations, it is still used in some specific fields.
In addition, in the laboratory, 1,2-dibromoethane is often used in organic chemistry experiments, as an electrophilic reagent to participate in nucleophilic substitution reactions, elimination reactions, etc., to help researchers explore the reaction mechanism and synthesize new compounds.
1,2-dibromoethane plays an indispensable role in many fields such as organic synthesis, industrial production, and laboratory research due to its unique chemical properties.
What are the physical properties of 1,2-dibromoethane?
1% 2C2-dibromoethane, also known as ethylene-dibromide, has the following physical properties:
This substance is a colorless, transparent, volatile liquid at room temperature, and smells sweet like chloroform. Its density is greater than that of water, about 2.17 g/cm ³. It can be miscible with most organic solvents such as ethanol, ether, and chloroform, but it is difficult to dissolve in water. The boiling point is 131.4 ° C, and the melting point is 9.3 ° C. Because of its symmetrical molecular structure, it is a non-polar molecule.
1% 2C2-dibromoethane contains bromine atoms, resulting in an increase in its relative molecular weight and an increase in intermolecular forces. Therefore, the boiling point is significantly higher than that of ethane, and the density is higher than that of water. The characteristics of its non-polar molecules make it well miscible with non-polar organic solvents, but insoluble in polar water. It is colorless and transparent, and has the properties of volatility and special odor. In practical application and operation, attention should be paid to preventing the harm caused by its volatilization.
What are the chemical properties of 1,2-dibromoethane?
1% 2C2-dibromoethane, also known as ethylenedibromine, is an organic compound. Its physical properties are as follows: It is a colorless transparent heavy liquid at room temperature, with a sweet taste, insoluble in water, miscible with organic solvents such as ethanol, ether, and chloroform, and has a higher density than water. The boiling point is 131.4 ° C and the melting point is 9.3 ° C.
Its chemical properties are quite active. From the perspective of substitution reaction, due to the strong electronegativity of bromine atoms and the large polarity of carbon-bromine bonds, the electron cloud density of α-carbon atoms decreases, making them vulnerable to attack by nucleophiles. For example, when heated in an aqueous sodium hydroxide solution, the bromine atom can be replaced by a hydroxyl group to form ethylene glycol; in an alcoholic solution, reacted with sodium cyanide, the bromine atom is replaced by a cyanide group to obtain NC-CH-CH-CN, and this product can be hydrolyzed to obtain succinic acid.
As far as the elimination reaction is concerned, under the action of a strong alkali alcohol solution, 1% 2C2-dibromoethane can undergo the elimination reaction. Taking a potassium hydroxide alcohol solution as an example, when heated, the molecule will remove two molecules of hydrogen bromide to form acetylene gas. This reaction is one of the important methods for preparing acetylene.
In addition, 1% 2C2-dibromoethane can also participate in many organic synthesis reactions and is widely used in the field of organic chemistry. However, it should be noted that it has certain toxicity and carcinogenicity, and protective measures must be taken when using it.
What are the environmental effects of 1,2-dibromoethane?
1% 2C2-dichloroethane, which is an organic halide, has a complex impact on the environment. Here is the ancient saying:
1% 2C2-dichloroethane is volatile, escapes in the atmosphere, or participates in photochemical reactions. In the atmosphere, it can be reacted by photolysis and other reactions to generate active substances such as chlorine-containing radicals. These radicals can interact with atmospheric components such as ozone, which may pose a potential threat to the ozone layer. If the ozone layer is damaged, ultraviolet radiation will increase, which will affect all living things.
In water, 1% 2C2-dichloroethane is insoluble in water, but it has a certain lipid solubility and is easily ingested by aquatic organisms. Accumulated in the body of organisms, transmitted and enriched through the food chain, to high-level organisms, the concentration gradually increases, or the biological physiological function is abnormal, reproduction is blocked, and ecological balance is also impacted. And its degradation in water is slow, long-term retention affects water quality and imbalances water ecosystems.
If the soil is polluted by 1% 2C2-dichloroethane, it can adsorb on soil particles, hinder the normal metabolic activities of microorganisms in the soil, inhibit soil enzyme activities, and then affect the soil nutrient cycle and plant root absorption of nutrients. Plant growth or inhibition, stunted development, and in severe cases, it can cause vegetation wither and death, and damage to regional ecological landscapes and ecological functions.
Furthermore, the risk of 1% 2C2-dichloroethane explosion should not be underestimated. Its steam and air can form explosive mixtures, which can cause combustion and explosion in case of open flames and high heat energy. When an accident occurs, it not only causes casualties, property losses, and the spread of pollutants generated by the explosion, but also makes the surrounding environment worse, causing damage to the atmosphere, soil, and water bodies. It is quite difficult to restore and control.
What are the precautions for storing and transporting 1,2-dibromoethane?
1% 2C2-dibromoethane, when storing and transporting, it is necessary to pay attention to many key matters.
First, this is a toxic chemical that is very harmful to human health. It can invade the human body through the respiratory tract, skin and digestive tract, and damage the central nervous system, liver and kidneys. Therefore, operators must strictly follow safety procedures, wear protective clothing, protective gloves, goggles and gas masks to prevent contact and inhalation.
Second, 1% 2C2-dibromoethane is flammable, and can cause combustion and explosion in case of open flames or hot topics. When storing, when placed in a cool and ventilated warehouse, away from fire and heat sources, the warehouse temperature should not exceed 30 ° C. And it should be stored separately from oxidants, acids, alkalis, etc., and should not be mixed. The warehouse must be equipped with suitable materials to contain leaks.
Third, when transporting, ensure that the container is sealed to prevent leakage. Transportation vehicles should be equipped with the corresponding variety and quantity of fire equipment and leakage emergency treatment equipment. During driving, it should be protected from exposure to the sun, rain, and high temperature. When road transportation, drive according to the specified route, and do not stop in residential areas and densely populated areas.
Fourth, 1% 2C2-dibromoethane is also harmful to the environment and can cause water and soil pollution. In the event of a leak, personnel from the leaked contaminated area should be quickly evacuated to a safe area, and quarantined, strictly restricting access. Emergency responders wear self-contained positive pressure breathing apparatus and anti-toxic clothing. Do not let leaks come into contact with combustible substances, cut off the source of leakage as much as possible, and prevent it from flowing into restricted spaces such as sewers and drainage ditches. If a small amount leaks, absorb it with sand, vermiculite or other inert materials. If there is a large amount of leakage, build an embankment or dig a pit for containment, cover it with foam to reduce steam disasters, and transfer it to a tanker or special collector with an explosion-proof pump for recycling or transportation to a waste treatment site for disposal.