4-Anilinesulfonic Acid

Garlic sprouts, the flower sprouts of garlic, have a wide range of main uses. When cooked in a diet, garlic sprouts are an excellent ingredient. Its texture is crisp and tender, and the smell is unique. It can be cooked with various meat and vegetarian ingredients, such as stir-frying with shredded meat. The garlic sprouts absorb the aroma of meat, and the shredded meat is stained with garlic. The two complement each other and have a rich taste, which increases the appetite. When paired with eggs, the freshness of the garlic sprouts blends with the tenderness and smoothness of the eggs, giving it a unique flavor. In the cold method, the garlic sprouts are blanched with vinegar, light soy sauce, sesame oil and other seasonings, which are refreshing and appetizing. It is a common delicacy on the table. Garlic sprouts also Its nature is warm, it tastes refreshing, and enters the spleen, stomach, and lung meridians. "Compendium of Materia Medica" says that garlic sprouts can warm the middle and lower the qi, replenish deficiency, and reconcile the viscera. Modern medical research also shows that garlic sprouts are rich in allicin and other ingredients, which have antibacterial and anti-inflammatory effects, and have inhibitory effects on Escherichia coli, Staphylococcus aureus and other pathogens; they can also regulate blood lipids to a certain extent, reduce blood viscosity, and are beneficial to cardiovascular health. At the level of agricultural planting, the production and sales of garlic sprouts can increase farmers' income. During the picking period of garlic sprouts, many purchasers gather in the origin. After the garlic sprouts are purchased, sorted, and packaged, they are shipped to all parts of In addition, after the garlic sprouts are picked, the underground garlic can continue to grow, achieving double harvest in one place, and improving land utilization and output efficiency.

For 4-nitroimidazole acid, its physical properties are not acceptable. For nitroimidazole, it has a certain boiling temperature. The melting temperature varies depending on the size of the molecule and the crystal form, and usually begins to melt at a specific temperature. The boiling temperature is also controlled by factors such as molecular force, which is determined by the energy table required for liquid melting. Its solubility is also an important physical property. In water, the solubility of nitroimidazole is limited, and its molecules contain hydrophobic groups. The interaction of water molecules is weak. However, in soluble substances, such as ethanol, acetone, etc., there is no good solubility of the phase, because the soluble nitroimidazole molecule can form appropriate molecular forces, such as van der force, etc., which are favorable for its dissolution. In addition, the density of nitroimidazole is also one of its physical characteristics. Its density varies depending on the degree of resistance and resistance. Generally speaking, the density of the phase is greater or lesser than that of water, which is determined by its molecular weight and molecular heap. On the outer surface, 4-nitroimidazole is often crystalline, and the formation of the crystal form is consistent with the law of its molecular arrangement. Its crystals may have a specific shape, such as film, film, etc., which is also one end of its physical rationality, and the surface light and other external characteristics of the crystal also reflect its physical properties and physical characteristics. Therefore, this general physicality, in the study and application of 4-nitroimidazole, is an indispensable consideration.

Borax is the common name of sodium tetraborate. Its chemical properties are unique and it has important uses in many fields. Borax is in the form of colorless translucent crystals or white crystalline powder. It has a salty taste and is easily soluble in water. In an aqueous solution, borax undergoes a hydrolysis reaction. When borax is hydrolyzed, borate ions combine with hydrogen ions ionized by water, making the solution alkaline. This alkaline property is crucial in many applications. Borax has a certain thermal stability. When heated, it will gradually lose its crystalline water. When the temperature continues to rise, further decomposition reactions will occur to form corresponding boron oxides and other products. In terms of redox properties, boron in borax is usually + 3 valent, which is relatively stable, and it is difficult to redox under normal conditions. However, in a specific strong oxidation or strong reduction environment, the valence of boron may also change. Borax can react with acids. For example, when reacted with strong acids, boric acid is formed. Boric acid is a weak acid, and this reaction shows the salt properties of borax, which can be used to prepare boric acid and other related compounds. In addition, borax can also react with some metal ions to form complexes with specific colors or properties. For example, complexes are formed with certain transition metal ions, which can be used to detect and identify specific metal ions in analytical chemistry, and can also be used to prepare materials with special properties in the field of materials science. The unique chemical properties of borax make it used in the glass industry to enhance the thermal stability and transparency of glass; in the ceramic industry, it can be used as a flux to reduce the firing temperature of ceramics; in the pharmaceutical field, it has also been used for external disinfection and other purposes.

The method of making 4-bromobenzoic acid is based on chemical principles. Although it is new to ancient methods, it can be stated as follows in today's science. First, starting with toluene, it is first brominated. The electrophilic substitution reaction of toluene and bromine is performed in the presence of appropriate catalysts, such as iron filings or iron tribromide. Cap methyl is an ortho-para-position group, and bromine is easy to enter the ortho or para-position of methyl. A mixture of o-bromotoluene and p-bromotoluene can be obtained. By fractional distillation, p-bromotoluene is extracted. Second, the method of oxidizing p-bromotoluene. The methyl group of p-bromotoluene can be oxidized to a carboxyl group in an alkaline environment and heated with a strong oxidizing agent, such as potassium permanganate. The reason for the reaction is that the methyl group is affected by the benzene ring, and the activity is slightly increased, which can be attacked by the oxidizing agent, and finally 4-bromobenzoic acid. After the reaction is completed, through the steps of acidification, crystallization, filtration, etc., pure 4-bromobenzoic acid can be obtained. Second, benzoic acid can also be used as the starting point. Benzoic acid is first protected by the step of protecting the carboxyl group to prevent the carboxyl group from being affected during bromination. The method of esterification is often used to make benzoic acid and alcohol, such as methanol, form methyl benzoate under After that, a brominating agent, such as N-bromosuccinimide (NBS), is used in the presence of an initiator such as benzoyl peroxide to carry out a bromination reaction. NBS can selectively introduce bromine atoms at the para-position of the benzene ring to obtain methyl 4-bromobenzoate. Finally, hydrolysis of this ester in alkali solution and then acidification can also produce 4-bromobenzoic acid. These two are common methods for making 4-bromobenzoic acid, each has its own length, depending on the availability of raw materials, the level of cost, and the quality of yield.

One of them is the need for storage. Saltpeter is strong in nature and easy to merge with other things. Therefore, it must be stored in a dry and cool place, away from fire and heat sources, and do not be in the same room as flammable and easily fried things to prevent unexpected changes. If it is not properly stored, it will cause disaster in case of heat or impact, and it will hurt people and destroy things, and cause endless damage. Second, the measurement and consumption must be accurate. The use of saltpeter, the amount of quantity, is related to the pros and cons of success or failure. When it comes to gunpowder, if the amount is appropriate, the explosive force will be appropriate, which can be used for work; if the amount is too large, the explosive force will be excessive, which will be a disaster; if the amount is too small, the force will not be reached, and it will be futile. It is the operator who should use fine tools to measure the weight, and must investigate every bit to ensure the safety and effectiveness of use. Third, when operating, be cautious. Hands must be clean to prevent debris from mixing in and causing it to change; action should be slow, avoid reckless and violent, for fear of triggering it. And people around should be vigilant, strictly abide by the procedures, and not leave without permission. If the equipment used, it must also be checked and repaired frequently to ensure that it is in good condition and has no hidden dangers. Fourth, know the nature of its reaction. When saltpeter meets other things, it often changes, or generates heat, or produces gas, or explodes. Therefore, before using it, you must know the reaction between it and the things used, take precautions in advance, and plan to move later. If you don't know its nature, you must not try it rashly, so as not to cause trouble. All these things are essential for the use of saltpeter. Users should keep it in mind, follow the rules, and never take it lightly, so as to ensure safety and make good use of it.