For professionals in the chemical and materials industries, a deep understanding of the compounds they use is paramount. UV Absorber 531, a critical component in protecting polymers and coatings from photodegradation, is no exception. At NINGBO INNO PHARMCHEM CO.,LTD., we believe in providing comprehensive information about our products, including the scientific underpinnings of their efficacy. This article explores the chemical structure and properties of UV Absorber 531, vital knowledge for anyone considering to buy UV absorber 531 online.

UV Absorber 531, identified by the CAS number 1843-05-6, is chemically known as 2-Hydroxy-4-n-octoxybenzophenone. Its molecular formula is C21H26O3, and it has a molecular weight of approximately 326.4 g/mol. The core of its functionality lies in its benzophenone backbone, featuring a hydroxyl group and an octyloxy side chain. The hydroxyl group, positioned ortho to the carbonyl group, facilitates intramolecular hydrogen bonding, which is crucial for its UV absorption and energy dissipation mechanism. The octyloxy chain enhances its solubility and compatibility with various organic matrices, including polymers and coating resins.

Physically, UV Absorber 531 typically appears as a light yellow or slightly yellow powder. It possesses a melting point range of 47-49°C, indicating its solid state at room temperature. Its low volatility is a key advantage, ensuring it remains in the material during processing and service life, thereby providing sustained protection. The compound exhibits good solubility in common organic solvents like acetone, toluene, and dichloromethane, while being practically insoluble in water. This solubility profile is essential for its effective incorporation into diverse formulations. The UV absorber 531 chemical structure, with its conjugated system and specific functional groups, allows it to efficiently absorb UV radiation and convert it into less harmful thermal energy.

The efficacy of UV Absorber 531 is further enhanced by its compatibility with other additives, particularly Hindered Amine Light Stabilizers (HALS), leading to synergistic protection. This makes it a preferred choice for applications requiring robust UV resistance, such as in automotive plastics, outdoor furniture, agricultural films, and high-performance coatings. When sourcing this material, understanding the specifications, including purity (typically ≥99%), transmittance at specific wavelengths (e.g., 460nm and 500nm), and ash content, is important. For those seeking a reliable UV absorber 531 supplier, NINGBO INNO PHARMCHEM CO.,LTD. offers products that meet these stringent quality standards.

In summary, the chemical makeup and physical characteristics of UV Absorber 531 are precisely engineered to provide superior UV protection. Its benzophenone derivative structure, coupled with its physical properties and compatibility, makes it an indispensable additive for enhancing the durability and performance of a wide range of materials. By understanding these scientific aspects, manufacturers can confidently integrate this vital compound into their products.