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What are the main uses of Acetin?
Vinegar essence is widely used. Vinegar essence is a solution of acetic acid, which is strongly acidic. Its primary use is in cooking and seasoning. In the kitchen, when used in moderation, it can increase the flavor of dishes, adjust them to be salty and light, and make the taste more mellow. For example, when cooking fish, a few drops of vinegar essence can remove the fishy smell of fish and increase its fresh aroma; when making cold dishes, add a little vinegar essence, which can improve the taste and freshness and increase the appetite.
Furthermore, in the field of cleaning, it also has a wonderful use. Because of its acidity, it can be descaled and decontaminated. In the home, use vinegar essence mixed with water to wipe the kitchen oil stains, such as stoves and ceramic tiles, which can make the dirt easy to remove and smooth as new; clean the kettle with heavy scale, pour an appropriate amount of vinegar essence, after a moment of soaking and boiling, the scale is easy to fall off, and restore the kettle to cleanliness.
And in terms of medical care, it is also beneficial. Folk commonly used diluted vinegar essence soaking feet can treat athlete's foot, because the acidic environment is not conducive to the growth of fungi; and vinegar essence wiping mosquito bites can slightly reduce itching, swelling and pain. However, it should be used with caution, because it is highly acidic, if the concentration is improper, it may cause skin burns.
In addition, it is also involved in industry. In some chemical processes, it can be used as raw materials or catalysts to participate in chemical reactions and help produce specific chemical products. However, industrial use is different from daily use in purity and specifications, and must not be confused. In short, vinegar has various uses. When used, it must be used according to its nature, in moderation and in accordance with the law, in order to obtain its benefits and avoid its harm.
What are the chemical properties of Acetin?
Acetate, that is, synthetic vinegar, its main component is acetic acid (acetic acid, $CH_3COOH $), the content is usually more than 30%, which is different from ordinary vinegar. Its chemical properties are as follows:
First, it is acidic and can turn purple litmus test solution red. In case of alkali, a neutralization reaction can occur. Taking sodium hydroxide as an example, the reaction equation is: $CH_3COOH + NaOH\ longrightarrow CH_3COONa + H_2O $, which is a typical acid-base neutralization to generate sodium acetate and water.
Second, it can react with active metals. If it reacts with zinc, $2CH_3COOH + Zn\ longrightarrow (CH_3COO) _2Zn + H_2 ↑ $, there is hydrogen escape, which is a common phenomenon in the reaction of acids with active metals.
Third, it can interact with metal oxides. Taking copper oxide as an example, $2CH_3COOH + CuO\ longrightarrow (CH_3COO) _2Cu + H_2O $, acetic acid reacts with copper oxide, causing black copper oxide to gradually dissolve and the solution turns blue.
Fourth, reacts with certain salts. For example, with calcium carbonate, $2CH_3COOH + CaCO_3\ longrightarrow (CH_3COO) _2Ca + H_2O + CO_2 ↑ $, carbon dioxide gas will be produced, and the phenomenon is that there are bubbles.
The acidity of vinegar is stronger than that of ordinary vinegar, and it is necessary to pay attention to its corrosiveness when using it. Due to its active chemical properties, improper use or adverse consequences.
What is the production method of Acetin?
Acetin is ethyl acetoacetate. Its preparation method is usually made of ethyl acetate as raw material. Under the action of alkaline catalysts such as sodium alcohol, it is obtained by Claisen condensation reaction.
The reaction principle is roughly as follows: The α-hydrogen atom of ethyl acetate is easy to lose protons in the alkaline environment of sodium alcohol and generate carbon negative ions. This carbon negative ion acts as a nucleophilic reagent to attack the carbonyl carbon of another molecule of ethyl acetate, and then a nucleophilic addition reaction occurs. Then, after a series of electron transfer and elimination reactions, ethyl acetoacetate is finally formed.
When the specific operation is carried out, first take an appropriate amount of absolute ethanol, put it into sodium metal, and wait for the sodium to completely react to form a sodium alcohol solution. Then, ethyl acetate is slowly added, and the reaction process needs to maintain an appropriate temperature and reaction time. After the reaction, pure ethyl acetoacetate can be obtained through various steps such as neutralization, extraction, and distillation.
Within the scope of the chemical process involved in "Tiangong Kaiji", although this specific preparation method is not explicitly mentioned, its concept of chemical change and process operation is also similar to the method of preparing Acetin here. All attention is paid to the selection of raw materials, the control of reaction conditions, and the purification of the product, in order to achieve the purpose of excellent preparation.
What is the market price of Acetin?
The market price of acetin is difficult to determine, due to various reasons. It is also a material, and it has a wide range of uses, and is used in the pharmaceutical and chemical industries.
From the perspective of its production, the price of raw materials fluctuates. If the raw materials used are abundant, their price may be cheap; if there are natural or man-made disasters, resulting in scarcity of raw materials, the price will be high. And the method of production is also related to the cost. Although the ancient method is familiar, it is time-consuming and time-consuming; the new technique is ingenious, but the cost is huge. Because the cost of production varies, the market price also varies.
Let's talk about the needs of the market again. When diseases and epidemics are rampant, there are many people who use acetin for medicine, and the demand exceeds the supply, and the price rises; if the chemical industry is sluggish, the demand decreases sharply, and the supply exceeds the demand, the price will tend to fall.
There are also commercial rules, and the competition of all merchants is also the main reason for the market price. Businesses compete for the market, or reduce the price to attract customers, or improve the quality to increase the reputation. Those with high reputation and many customers, the price may be stable; otherwise, it is inevitable that the price will fluctuate.
And the decrees of the four parties also affect the price. The weight of taxes and the strictness of regulations all make the market price change. If the tax is heavily regulated, the cost of the business will increase, and the price will follow; if the tax is light and the management is wide, the profit will be thick and the price may be flat.
To sum up, the market price of acetin depends on many factors such as raw materials, supply and demand, commercial competition, and government decrees. It changes rapidly. If you want to know the exact price, you must carefully consider the current situation and cannot generalize.
What are the precautions for using Acetin?
Those who use acetin are medicinal stones and the like. When using it, all kinds of matters should not be ignored.
The first thing to do is to clarify its nature. Acetin has specific pharmacology, or can relieve pain and reduce fever. However, whether it is fierce or not, it must be carefully inspected. If the medication is careless, or causes the viscera to violate, and the qi and blood are disordered.
Check the amount again. The degree of dosage is related to the efficacy and safety of the medicine. Less is ineffective, and the medicine is not as good as the disease; more is harmful, and damages the righteousness. Therefore, with acetin, the amount must be accurate, depending on the severity of the disease and the strength of the body. If children, the elderly, and the infirm, they should be especially cautious, and the dosage should be reduced to prevent the disease of overdose.
Furthermore, review its contraindications. Or people with viscera deficiency, lack of qi and blood, or allergies to acetin, are not available. Or use it with other drugs, fear of fear of each other and the opposite change. Therefore, before using acetin, it is necessary to carefully review the medical records, know its constitution, and know whether it is contraindicated, so as to ensure the safety of the drug.
There are also exquisite ways to use the drug. There are rules for whether it is appropriate to eat before or after a meal. According to its pharmacology and its impact on the stomach and intestines. If it is not taken properly, it may cause the drug to be ineffective, or hurt the spleen and stomach.
When using the drug, keep a close watch on its reaction. If you have any discomfort after taking the medicine, such as dizziness, nausea, rash, etc., this is an adverse reaction of the medicine, and you must stop taking it immediately, and seek medical advice quickly without delay.
In short, those who use acetin must specify the medicinal properties, be careful about the dosage, check the contraindications, choose the method of taking it, and pay close attention to the reaction, so that you can obtain its benefits and avoid its harm, and protect your health.