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What is the main use of methyl 5-bromo-2-iodobenzoate?
Borax is an important traditional Chinese medicine, and its main uses are quite extensive.
In terms of clearing away heat and detoxifying, borax is cold and can detoxify the heat toxicity of coke. It is often used to treat sore throat. Many ancient medical books, such as Bingboron Powder in "Authentic Surgical", are made of borax combined with borneol, Xuanming powder, and cinnabar. It can clear away heat and reduce swelling, detoxify and relieve pain, and has a good effect on swelling and pain in the throat and sores in the mouth and tongue. In oral diseases, borax also plays a key role in treating sores in the mouth and tongue, swelling and pain in the gums. Because of its effect of clearing away heat and detoxifying, antiseptic and muscle building, it can be made into a mouthwash or an external powder and applied to the affected area to promote wound healing and
Furthermore, borax is also used for the symptoms of red eyes, swelling and pain. Traditional Chinese medicine believes that the red eyes are mostly caused by wind-heat in the liver meridian or inflammation in the heart. Borax can help clear away heat and laxative fire, and clear the eyes and fade. For example, some external eye washing prescriptions, adding borax can improve the symptoms of red eyes, itchy eyes, and more.
In addition, borax is also effective in phlegm-heat cough. It can clear away heat and reduce phlegm, and can be used for phlegm-heat to suppress the lungs, causing cough and expectoration to be yellow. It is often combined with other heat-clearing and phlegm-reducing drugs to enhance the power of reducing phlegm and relieving cough.
Although borax has various uses, it is cold and has small poisons. It should be used with caution The doctor's advice should be followed to control the dosage and usage to avoid adverse reactions.
What are the physical properties of methyl 5-bromo-2-iodobenzoate
Borax is an important compound of boron, and it is also a common boron-containing mineral and boron compound. The following are the physical properties of borax:
- ** Morphology **: Borax is usually colorless and translucent crystals or white crystalline powder. Among the various forms of substances recorded in "Tiangong Kaiwu", this morphology is different from many mineral raw materials. For example, metal ores recorded in the book are mostly in the form of lumps, while the crystalline or powdery form of borax is unique. In the natural environment, borax is often born in dry salt lakes and forms this form after long-term evaporation and crystallization.
- ** Color **: Pure borax is colorless and transparent, but it is mostly white. This white is different from the white products recorded in the book after some metal smelting, and the color of borax is purer and softer. Its white color is derived from its own chemical composition and crystal structure, and it shows this visual effect on the reflection and refraction of light.
- ** Odor and Taste **: Borax is odorless and salty. Its odorless properties make it different from some chemicals with pungent odors. In practical application and storage, it is less inconvenient due to odor. The characteristics of salty taste show that its chemical properties are similar to salts, and it also reflects that it will have corresponding ions in aqueous solutions.
- ** Density and Hardness **: Borax has a density of about 1.73 g/cm3, which is much smaller than that of common metals such as iron and copper. This low density characteristic gives borax unique advantages in some application scenarios where weight is required. Its Mohs hardness is about 2-2.5, and its texture is soft. It can be scratched on the surface by nails. This soft property is conducive to processing into different forms such as powder.
- ** Solubility **: Borax is easily soluble in water, and this property is crucial. After dissolving in water, borax will undergo a series of chemical changes such as hydrolysis, generating corresponding ions, laying the foundation for its application in industry, medicine and other fields. For example, in traditional medical applications, its solution dissolved in water can exert a specific medicinal effect.
What is the chemical synthesis method of methyl 5-bromo-2-iodobenzoate?
To make ethyl acetate, the method is as follows:
First take an appropriate amount of ethanol and place it in a clean flask. Ethanol is mild in nature and is a common organic reagent. Then slowly inject concentrated sulfuric acid. This step needs to be cautious. Because concentrated sulfuric acid is highly corrosive and water-absorbent, it should be injected slowly along the wall and stirred constantly to prevent local overheating. In this reaction, concentrated sulfuric acid not only acts as a catalyst to accelerate the reaction process, but also uses its water absorption to move the balance in the direction of forming ethyl acetate.
Then add an appropriate amount of glacial acetic acid. Glacial acetic acid has a pungent smell and is the key raw material for the reaction. Prepare all three, build a distillation device and carefully heat it with an alcohol lamp. The heating process needs to control the heat and maintain an appropriate temperature, about 110-120 ° C. This temperature range is conducive to the esterification reaction between acetic acid and ethanol catalyzed by concentrated sulfuric acid to form ethyl acetate and water.
During the reaction, it can be observed that the liquid in the flask is slightly boiling, and the generated steam enters the conical flask containing the saturated sodium carbonate solution through the conduit. Saturated sodium carbonate solution has many functions. One can absorb unreacted acetic acid, the other can dissolve unreacted ethanol, and the third can reduce the solubility of ethyl acetate, making it easy to stratify and precipitate. After a while, the liquid in the conical flask is stratified, and the upper layer is the prepared ethyl acetate, which is transparent in color and has a special fragrance. After the reaction is completed, carefully separate the upper layer of ethyl acetate, and the finished product can be obtained. This is the method of making ethyl acetate.
What are the precautions for methyl 5-bromo-2-iodobenzoate during storage and transportation?
Mercury is a highly toxic substance. Dansha is mercury sulfide. During the preparation and use of it, many matters must be paid attention to.
First protection. The refining of Dansha as mercury, or the use of mercury in other ways, requires careful protection. For example, the ancients used special utensils and means to avoid mercury gas damage. Alchemists must wear special clothing, work in a well-ventilated place, and or use spices and other materials to remove the poison of mercury gas. If the protection is not good, mercury gas enters the body, causing light dizziness, fatigue, and oral erosion, which can endanger life.
The second is storage. Mercury has special properties and is volatile. It must be tightly sealed when stored. It is often filled in special containers, such as porcelain cans, lead cans, etc., and placed in a cool, dry, and dark place to prevent it from evaporating. If stored improperly, mercury evaporates in the air, which not only causes its loss, but also makes the environment contain mercury, endangering the surrounding people and animals.
Further transportation. When transporting mercury, the packaging must be stable and tight. The ancients wrapped mercury containers with thick cloth and oil paper layers, and then loaded them with sturdy objects such as wooden boxes to prevent mercury leakage during transportation. If mercury leaks during transportation, it will be extremely difficult to clean up, and it will pollute the environment and harm everyone.
The storage and transportation of dansa and mercury are related to human life and the environment. The ancients have accumulated a lot of experience in practice. Although there may be differences from today's scientific methods, their cautious attitude is worth learning from.
What is the approximate market price of methyl 5-bromo-2-iodobenzoate?
In today's world, the business situation is complicated, and it is not easy to know the market price of boron-2-aminobutyrate ethyl ester. However, according to the market conditions and past transactions, it can be roughly deduced.
Boron-2-aminobutyrate ethyl ester is used in various fields of chemical industry and medicine. Its use is wide, and the market price fluctuates with changes in supply and demand, the price of raw materials, and the difficulty of processing.
Looking at various markets, the price of similar products varies depending on the quality and source. If the quality is good and it comes from a good place, the price will be high; if the quality is average and the production source is wide, the price may be slightly lower.
At present, the market price of ethyl boron-2-aminobutyrate is probably between a few hundred and several thousand yuan per kilogram. However, this is only a rough estimate. Due to the changing market situation, the price of raw materials rises and falls suddenly, and the new process also affects its cost.
And the supply and demand are different in different places. In the prosperous places in the east, the demand may be prosperous, and the price may be slightly higher; in the remote places in the west, the demand may be weak, and the price may be slightly lower. And trade policies and tax regulations also affect the price. In order to know the exact price, you should carefully observe the market conditions and consult the industry to obtain a more accurate number.