2-Hydroxy-4-Methoxy-Benzophenone-5-Sulfonic Acid Benzophenone-4

2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid and benzophenone-4, both of which are widely used and commonly found in many fields.
In the cosmetic industry, they play an important role in sun protection. The ultraviolet rays in the sun are very harmful to the skin, and the two can effectively absorb ultraviolet rays and convert light energy into heat energy release, thereby protecting the skin from ultraviolet rays and reducing the risk of sunburn, tanning and photoaging. Like daily sunscreens, lotions, creams and other products, these ingredients are often added to build a protective barrier for the skin.
In the field of plastics and coatings, they are also key additives. Plastic products are prone to aging, discoloration, and performance degradation after long-term exposure to light, and so are coatings. Adding these two can enhance the UV resistance of plastics and coatings, prolong the service life, and maintain the appearance color and physical properties. Such as outdoor plastic products, automotive paints, etc., after adding them, they can better resist sunlight erosion.
In addition, in the production of some special optical materials, because of their light absorption characteristics of specific wavelengths, they can be used to adjust the optical properties of materials to meet the special needs of optical instruments, display screens, etc., and help achieve accurate optical effects.

2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid and benzophenone-4, the physicochemical properties of these two are as follows:
2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, often white to light yellow crystalline powder. It has good water solubility, due to the presence of sulfonic acid groups, which endows the compound with hydrophilicity and can have a certain degree of solubility in water. It performs well in terms of photostability, which is due to the benzophenone structural unit contained in its molecular structure, which can absorb ultraviolet rays of specific wavelengths, thereby effectively preventing itself and surrounding substances from being damaged by ultraviolet rays, so it is often used in sunscreens and other products. Its melting point is relatively high, which is due to the strong interaction force between molecules, requiring a higher temperature to destroy the lattice structure and make it melt.
Benzophenone-4, also a white crystalline powder. In terms of solubility, it is slightly soluble in water, but soluble in organic solvents such as ethanol and acetone. It also has the ability to absorb ultraviolet rays, but compared with 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, the absorption band may be different. In terms of chemical stability, it is relatively stable under general conditions, but under extreme conditions such as strong acid, strong base or high temperature, the molecular structure may change. Its boiling point is within a certain range due to factors such as molecular weight and intermolecular forces. In organic synthesis and related industrial fields, this boiling point characteristic is of great significance for separation, purification and other operations.
These two have unique applications in different fields, both of which are determined by their special physicochemical properties.

2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid and benzophenone-4 should pay attention to the following numbers when using.
First, it is related to storage. These two should be placed in a cool, dry and well-ventilated place, away from direct sunlight. Due to light or its property variation, the effect of use will be affected. If stored in a humid and warm place, or cause it to deliquescence or deterioration, it will damage its quality.
Second, about the rules of operation. When using, when following strict operating procedures, it is recommended to wear suitable protective equipment, such as gloves, goggles, etc. Because it may be irritating to the skin and eyes, if it is accidentally touched, it should be rinsed with a large amount of water, and seek medical treatment if necessary. And the operating environment needs to be ventilated and smooth to prevent the accumulation of harmful gases.
Third, consider the appropriate compatibility. When using with other substances, be careful. Study its chemical properties in detail. Due to improper compatibility or chemical reactions, the product is impure or dangerous substances are generated.
Fourth, pay attention to the degree of dosage. Accurately control the dosage according to specific uses and needs. If the dosage is too much or the cost will rise and the product performance will be abnormal; if it is too little, it will be difficult to achieve the expected effect.
In conclusion, when using 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid and benzophenone-4, careful attention should be paid to storage, operation, compatibility and dosage to ensure safe use and achieve the best results.

The preparation process of 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid and benzophenone-4 is a delicate and precise process.
The first to bear the brunt, the selection of raw materials is the key. To make both, it is necessary to prepare suitable purity and quality starting materials, such as specific phenols, ketones, etc., which are the basis for the preparation of good products.
In the reaction stage, the condensation reaction is often the core. In an appropriate reaction vessel, the raw materials are put into the raw materials according to the precise ratio, and the specific catalyst is used to help the reaction advance. If a specific metal salt or organic base is used as a catalyst, the dosage and activity need to be carefully controlled to prevent excessive or insufficient reaction. The reaction temperature and time are also of paramount importance, usually maintained at a certain temperature range, such as 100 ° C to 150 ° C. After several hours to ten hours of reaction, the raw materials are fully converted.
The pH of the reaction environment also needs to be carefully adjusted, and buffer solutions or acid-base regulators are used to maintain the appropriate pH value, which has a great impact on the selectivity and rate of the reaction.
After the reaction is completed, the separation and purification of the product are indispensable. Extraction, crystallization, chromatographic separation and other means are often used. During extraction, a suitable organic solvent is selected to effectively extract the product from the reaction mixture; the crystallization process adjusts the cooling rate and solvent ratio to make the product precipitate in pure crystal form; the chromatographic separation relies on the adsorption difference of different components by the adsorbent to achieve a high degree of purification of the product.
After this series of delicate operations, high-purity 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid and benzophenone-4 can be obtained to meet the strict requirements of quality and performance in various fields.

2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid (Benzophenone-4) has many advantages over other similar products.
In terms of sun protection properties, this substance has excellent UV absorption capacity. It can effectively absorb medium-wave ultraviolet rays (UVB) and some long-wave ultraviolet rays (UVA), which can form a solid protective barrier on the surface of the skin and greatly reduce the damage of ultraviolet rays to the skin. Just like a strong shield in ancient times, it can resist foreign invasion. Compared with some congeneric products, it absorbs ultraviolet rays in a wider range and has more comprehensive protection, just like the expansion of the city wall, the defense area is enlarged, and the protection of the skin is more comprehensive.
In terms of stability, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid performs well. Even if exposed to sunlight for a long time, or in an environment with variable temperature and humidity, its chemical structure is still not easy to change, and the sun protection effect can be durable and stable. Like an ancient building that still stands after years of baptism, it has a solid foundation. Unlike some similar products, it is easy to decompose and fail when external conditions change, resulting in a significant decrease in sun protection ability.
Furthermore, the safety of this substance is quite high. After many rigorous experiments and tests, it has been confirmed that its irritation to human skin is minimal and the risk of sensitization is low. For people of all skin types, it is more suitable. It is like a caring guard, protecting skin health, but does not bring additional burden. Some similar products may easily cause skin discomfort due to ingredient problems, just like hidden hidden guards, but cause harm to the owner.
Solubility is also one of its advantages. 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid has good solubility in water and various organic solvents. This allows it to be more evenly dispersed in the system when preparing sunscreen products, making it easier to formulate and produce, as if it can be perfectly integrated with other ingredients to build an efficient sunscreen system. In contrast, some similar products have poor solubility, which will cause many troubles to the production process and make it difficult to achieve the desired product effect.