4 Iodo 2 Methoxy Aniline

4-Question-What is the main use of 2-aminobenzoic acid?, Please imitate "Tiangong Kaiwu" to answer this question in classical Chinese style, about 500 words, direct text, no title and conclusion.
Aminobenzoic acid has a wide range of uses and has its merits in many fields in the world.
In the way of medicine, it is an important material for making good medicine. Because of its specific chemical properties, it can help physicians make analgesic and antipyretic agents. Ancient physicians often asked for medicinal stones to relieve pain. Today, aminobenzoic acid is used in pharmaceutical formulas to relieve the suffering of patients. Such as analgesic medicine, or rely on it to adjust the mechanism, so that qi and blood flow smoothly, pain and illness can be reduced.
In the dye industry, it is also a key thing. Can provide dyers with bright and long-lasting pigments. In the past, dyers used natural things as colors, but the fastness and richness of the color were limited. Dyes made of aminobenzoic acid can make the color of fabrics not fade after years of grinding and rain, and can dye all kinds of fresh colors to meet the pursuit of beauty in the world, bright clothes and silk, and increase the color of life.
In the field of agriculture, it is also used. Can be used as raw materials for plant growth regulators. Farming is related to people's livelihood, and the cultivation of crops requires careful care. The regulator assisted by aminobenzoic acid can promote plants to take root and germinate, make seedlings strong, flowers flourish, and fruits ripe and fruitful, help the production in the field, and ensure the reality of the warehouse.
In daily chemical products, it is also indispensable. In the production of cosmetics, it can help protect the skin. Or prevent ultraviolet damage, or adjust the metabolism of the skin, make the face glow, and is valued by beauty lovers.
Although aminobenzoic acid is invisible to the eyes of ordinary people, it is an indispensable material in medicine, dyes, agriculture, and daily chemical industries. It silently helps and benefits the world.

Fumethoxybenzaldehyde is a class of organic compounds, which are used in many fields such as chemical industry, medicine, and fragrance. Its physical properties are quite characteristic, as follows:
Looking at its properties, it is mostly colorless to light yellow liquid under normal conditions, or crystalline solid, depending on the specific isomers and environmental conditions. Its appearance is pure and has a certain luster, which is intuitively recognizable.
When it comes to the melting point, the melting point and boiling point of methoxybenzaldehyde vary depending on the substitution position of methoxy group on the benzene ring. For example, p-methoxybenzaldehyde, the melting point is about 38-40 ° C, and the boiling point is roughly 248-249 ° C. The melting point of o-methoxybenzaldehyde is about -15 ° C, and the boiling point is about 238 ° C. The melting point of m-methoxybenzaldehyde is about -18 ° C, and the boiling point is about 258 ° C. This difference is due to the difference in intermolecular forces. The position of the substituent affects the spatial structure and polarity of the molecule, which in turn affects the melting boiling point.
Its solubility also follows a regular pattern. Methoxybenzaldehyde is slightly soluble in water, but it can be soluble in organic solvents such as ethanol, ether, and acetone. This is because water is an extremely polar solvent, while methoxybenzaldehyde contains polar aldehyde groups and methoxy groups, but its benzene ring structure is a non-polar part, and the overall polarity is limited. Therefore, the interaction with water is weak, and organic solvents with similar polarity can be well miscible.
As for the density, methoxybenzaldehyde has a slightly higher density than water, between 1.1 and 1.2 g/cm ³, with slight differences between different isomers. This property allows liquids with different densities than water to be differentiated and treated according to this property when it comes to liquid-liquid separation and other operations.
In addition, methoxybenzaldehyde has a special odor, which is mostly fragrant, and can be used in fragrance formulation to add a unique flavor to the product. This odor property is related to its molecular structure, and specific functional groups and molecular configurations enable it to interact with olfactory receptors to trigger olfactory perception.

The chemical properties of methoxybenzoic acid mentioned in Fu 4-Question 2 are relatively stable.
Methoxybenzoic acid contains methoxy and carboxyl groups, both of which affect its stability. Methoxy is the power supply group, which can enhance the electron cloud density of the benzene ring and improve the stability of the benzene ring. Although the carboxyl group has certain activity, it can undergo reactions such as esterification and salt formation, but under normal conditions, the overall structure of methoxybenzoic acid is not easy to change spontaneously.
At room temperature and pressure, without special chemical reagents or external stimuli, methoxybenzoic acid can be stored for a long time without significant changes. For example, in a general laboratory environment, as long as it avoids contact with strong oxidants, strong acids, strong bases, and other substances that can react violently with it, its chemical structure can remain stable.
However, if it is under specific conditions, its stability will also change. In case of high temperature, the carboxyl group may undergo decarboxylation reaction; under the action of strong acid and strong base, the carboxyl group and the methoxy group may undergo corresponding hydrolysis and other reactions, thereby changing its chemical structure. But only in general, methoxybenzoic acid has a certain chemical stability. It is relatively stable and can maintain its own chemical structure without interference from specific external conditions.

What are the synthesis methods of 4-question-2-aminobenzoic acid?
Although the synthesis method of aminobenzoic acid is not specifically recorded in Tiangong Kaiwu, it can be deduced in combination with traditional chemical processes and later related knowledge.
In ancient methods, natural benzene-containing compounds may be tried as starting materials. For example, some plants contain specific benzene ring structural components, which can be extracted and modified, or can achieve the purpose. First extract the relevant components in the plant with a suitable solvent, and then use traditional acid-base treatment methods to change its chemical groups and gradually introduce amino and carboxyl groups. However, this process must be difficult, and the requirements for raw material screening and treatment conditions are extremely high.
Or start from simple inorganic substances to construct benzene rings. For example, through common inorganic substances such as carbon and saltpeter, under specific high temperature and catalytic conditions, try to generate benzene basic substances. Then, the addition reaction of amino and carboxyl groups is carried out. However, this approach requires quite high equipment, and the conditions may be difficult to achieve accurately at that time.
Later chemical development, organic synthesis methods gradually enriched. Benzoic acid can be used as a raw material, nitro is introduced through nitrification, and then the nitro is converted into amino groups by reduction, and amino benzoic acid can be prepared. This method is relatively clear, and the conditions are easier to control. However, specific chemical reagents are required, which may be difficult to obtain in ancient times.
Or start with toluene, first oxidize the side chain to obtain benzoic acid, and then follow the above nitrification and reduction steps. The raw materials for this route are relatively easy to obtain, but each step of the reaction is strictly controlled by the conditions, requiring professional operation and equipment, which is quite difficult to achieve in the ancient chemical environment.

In the case of methoxybenzaldehyde, many things should be paid attention to during storage and transportation.
When storing, the first choice of environment. It should be placed in a cool and well-ventilated place, away from fires and heat sources. Cover because of its certain volatility and flammability, high temperature and open flame are prone to danger. The temperature of the warehouse should be controlled within a suitable range, and it should not be too high, so as not to affect its chemical stability.
Furthermore, storage containers are also crucial. Use a well-sealed container to prevent it from evaporating and escaping, and to avoid reactions such as oxidation caused by excessive contact with air. At the same time, the material of the container should also be considered, and chemical reactions with methoxybenzaldehyde should not occur, so as not to damage the quality of the material.
As for transportation, the transportation vehicle must meet the relevant safety standards. It should be equipped with corresponding fire fighting equipment and leakage emergency treatment equipment to prevent accidents. During driving, drivers must be cautious, drive slowly, and avoid intense operations such as sudden braking and sharp turns to prevent material leakage due to collision damage of the container.
And during transportation, pay attention to environmental conditions. Do not expose to the hot sun, and avoid rain. If baked at high temperature, methoxybenzaldehyde volatilization will increase, pressure will increase, and it is easy to cause the container to break; if rainwater seeps into the container, it may cause material to be contaminated and cause chemical reactions.
In addition, transportation personnel should be professionally trained and familiar with the characteristics of methoxybenzaldehyde and emergency treatment methods. In the event of an emergency such as a leak, it can be disposed of quickly and properly to reduce the hazard. In this way, when storing and transporting methoxybenzaldehyde, pay attention everywhere to ensure safety and material damage.