4-Bromo-2,5-diethylbenzaldehyde bromide, its physical properties are as follows:
This substance is mostly liquid at room temperature, and it is clear and transparent when viewed. It is like a quiet water, but its color may vary slightly due to purity. It is often nearly colorless, and occasionally has a slight yellowish tone, just like the light light when the morning light shines.
Smell its smell, pungent and strong. If placed under the nose, you can instantly feel an impulse reaching the depths of the nasal cavity, making the olfactory nerve sensitive and alert. This smell is pungent and quite irritating, and you will feel uncomfortable if you are not careful.
In terms of its density, it is heavier than water. If you pour it into the water, it can be seen that it is like a sinking bead falling into the abyss, sinking straight down, and lying quietly at the bottom of the water. The two are clearly defined and do not blend with each other.
Its boiling point is quite high, and it needs to be under a specific high temperature to transform it from liquid to gas. When heated, watch its state gradually change, and at the boiling point, you can see bubbles churning on the liquid surface, like water boiling, turning into wisps of steam rising.
The melting point is relatively low, and it is a liquid at room temperature. If it cools down to a specific low temperature, the molecular activities gradually slow down, get close to each other, and finally solidify into a solid state, just like a clear spring that turns into ice when it meets cold. The properties also change between the morphological changes.
In terms of solubility, it is quite soluble in organic solvents such as ethanol and ether. When the two mix, they can quickly blend to form a uniform phase, just like water and milk. However, in water, the solubility is extremely small, and the two meet, just like oil and water, distinct and difficult to blend.

4-Bromo-2,5-diethylbenzaldehyde is an organic compound with unique chemical properties and is widely used in the field of organic synthesis.
It has an aldehyde group, so it has typical aldehyde chemical properties. Oxidation reaction can occur. In case of weak oxidant Torun reagent, the aldehyde group will be oxidized to carboxyl group to form 4-bromo-2,5-diethylbenzoic acid, and silver mirror will be produced at the same time. This reaction can be used to test aldehyde groups; in case of strong oxidants such as potassium permanganate, not only aldehyde groups are oxidized, but alkyl groups may also be oxidized.
Reduction reaction can occur. Hydrogen is used as the reducing agent. Under the action of suitable catalysts (such as nickel, palladium, etc.), aldehyde groups can be reduced to alcohol hydroxyl groups to generate 4-bromo-2,5-diethylbenzyl alcohol.
Because it contains a benzene ring and has the properties of aromatic hydrocarbons, an electrophilic substitution reaction can occur. The electron cloud density distribution on the benzene ring is affected by bromine atoms, aldehyde groups and ethyl groups. Bromine is an ortho-para-site group and aldehyde groups are meta-site groups. Under the combined influence, the electrophilic substitution reaction may occur at a specific position in the benzene ring. For example, when a bromine reaction occurs, the bromine atom may mainly replace the hydrogen atom at a specific position
In addition, aldehyde groups can undergo condensation reactions with compounds containing active hydrogen. If reacted with alcohols under acid catalysis, acetals can be formed. This property is often used to protect aldehyde groups in organic synthesis. After a specific reaction is completed, the aldehyde groups can be restored by hydrolysis.
4-Bromo-2,5-diethylbenzaldehyde is rich in chemical properties and is an important intermediate in organic synthesis, pharmaceutical chemistry and other fields. It can construct complex organic compounds through various reactions to meet the needs of different fields.

The common method for the synthesis of 4-bromo-2,5-diethoxy-benzaldehyde is to take 2,5-diethoxy-phenol, a suitable brominating agent, such as liquid bromine or N-bromosuccinimide (NBS), in a suitable solvent, such as dichloromethane or carbon tetrachloride, at low temperature and in the presence of a catalyst, such as iron powder or iron tribromide, to obtain 4-bromo-2,5-diethoxy-phenol. This step requires careful temperature control and feeding rate to prevent the formation of polybrominated by-products.
Then, the obtained 4-bromo-2,5-diethoxy phenol is oxidized with a mild oxidizing agent, such as manganese dioxide or chromium trioxide-pyridine complex, in an organic solvent, such as dichloromethane or acetic acid, so that the phenolic hydroxyl group is oxidized to an aldehyde group, and finally 4-bromo-2,5-diethoxy benzaldehyde. This oxidation process requires attention to the choice of reaction conditions to avoid excessive oxidation.
There is another method, which can first react 2,5-diethoxy benzene with a brominating agent to obtain 4-bromo-2,5-diethoxy benzene. After that, the target product 4-bromo-2,5-diethoxybenzaldehyde can also be obtained by reacting with formylation reagents, such as N, N-dimethylformamide (DMF) and phosphorus oxychloride (POCl), at appropriate temperatures, using anhydrous aluminum trichloride as a catalyst. In this process, the amount of catalyst and the reaction temperature have a great influence on the selectivity and yield of the reaction.

Sodium 4-bromo-2,5-diethylbenzenesulfonate has important applications in printing and dyeing, medicine, chemical synthesis and other fields.
In the field of printing and dyeing, it can be used as a dye aid. In the printing and dyeing process, it is crucial to evenly color the dye, otherwise the fabric color is uneven and affects the quality. Sodium 4-bromo-2,5-diethylbenzenesulfonate can enhance the affinity between the dye and the fabric through its own characteristics, so that the dye is evenly attached to the fabric fibers, so that the color of the fabric after printing and dyeing is uniform and bright, and it improves the color fastness, so that the fabric is not easy to fade during daily wear and washing.
In the field of medicine, it is often an important intermediate. Many drug synthesis requires organic compounds with specific structures as starting materials or reaction intermediates. Sodium 4-bromo-2,5-diethylbenzenesulfonate can participate in a series of chemical reactions due to its unique molecular structure. After ingeniously designed reaction routes, it can be converted into compounds with specific pharmacological activities, thus laying the foundation for the development and production of new drugs.
In chemical synthesis, this compound also plays a key role. Chemical synthesis often requires the construction of complex organic molecular structures. Sodium 4-bromo-2,5-diethylbenzenesulfonate can be used as a starting material to participate in the construction of carbon-carbon bonds and carbon-heteroatomic bonds. Through the means of organic synthetic chemistry, based on it, polymer materials, surfactants and other chemical products with special properties can be synthesized to meet the needs of different industrial production and life.

4-Hydroxy-2,5-dimethylbenzaldehyde chlorine should be paid attention to many key matters during storage and transportation.
First safety protection. This substance may be toxic and irritating, and appropriate protective equipment must be worn when contacting it, such as protective clothing, gloves, goggles and gas masks, to prevent it from coming into contact with the skin, eyes and inhaling into the body, causing physical damage.
Secondary storage conditions. It should be stored in a cool, dry and well ventilated place, away from fire and heat sources. Because it is sensitive to temperature and humidity, high temperature, high humidity environment or cause it to deteriorate. It needs to be stored separately from oxidants, acids, alkalis, etc., to avoid dangerous chemical reactions caused by mixed storage. And the storage place should be set up with clear warning signs to prevent accidental touch and misuse.
The transportation process should not be ignored. Before transportation, ensure that the packaging is complete and well sealed to prevent leakage. Select compliant transportation tools, and properly load and fix them in accordance with relevant regulations to avoid packaging damage caused by collision and vibration during transportation. Transportation personnel need to be professionally trained and familiar with the characteristics of the substance and emergency treatment methods. In the event of a leak, personnel should be evacuated from the surrounding area quickly, isolate the leakage area, and take corresponding treatment measures according to the leakage amount and site conditions. Small leaks can be absorbed by inert materials such as sand and vermiculite. Large leaks need to be built embankments or excavated for containment, and timely reported to relevant departments.