The effectiveness of Benzophenone-4 (CAS 4065-45-6) as a UV filter and photoprotective agent lies in its specific chemical structure and properties. Understanding this science is crucial for formulators and manufacturers seeking to harness its full potential. This article explores the chemistry behind Benzophenone-4, detailing its molecular characteristics, UV absorption mechanism, and how these attributes translate into its wide-ranging applications, particularly in cosmetics and industrial materials.

Chemical Structure and Properties

Benzophenone-4, also known by synonyms such as Sulisobenzone or 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid, possesses a unique molecular structure that dictates its functionality. Its chemical formula is C14H12O6S, and its molar mass is approximately 308.31 g/mol. The presence of the benzophenone chromophore allows it to absorb UV light, while the attached sulfonic acid group makes it water-soluble. This water solubility is a significant advantage, simplifying its incorporation into various formulations, especially aqueous systems found in many personal care products and industrial applications like water-based inks and coatings. Typically a white to light-yellow crystalline powder, it exhibits good stability, a critical factor for ingredients that need to withstand environmental exposure without degradation.

The UV Absorption Mechanism

The core function of Benzophenone-4 is its ability to absorb UV radiation. When UV photons strike the molecule, they excite electrons to higher energy levels. As these electrons return to their ground state, the absorbed energy is dissipated primarily as thermal energy, effectively neutralizing the UV radiation. Benzophenone-4 is particularly effective in absorbing short-wave UVA (290-360 nm) and UVB rays. The specific arrangement of functional groups, including the hydroxyl group ortho to the carbonyl group within the benzophenone structure, is essential for this UV absorption capability. Furthermore, its high photostability means it can absorb UV light repeatedly without significant decomposition, a trait that also allows it to photostabilize other UV-sensitive components in a formulation. This makes it a highly reliable choice for manufacturers looking to buy UV filters that offer lasting protection.

Photostability and Stabilization Effects

Beyond its direct UV absorption, Benzophenone-4's contribution to formulation stability is noteworthy. It can prevent the photodegradation of other ingredients, such as colorants, fragrances, and active compounds, that are susceptible to UV damage. This means that products containing Benzophenone-4 are likely to maintain their color, scent, and efficacy for longer periods. This stabilizing property is highly valued in industries where product longevity is critical, such as cosmetics, automotive coatings, and textile treatments. For businesses looking to buy raw materials that offer these added benefits, Benzophenone-4 presents a compelling solution.

Quality and Sourcing from NINGBO INNO PHARMCHEM CO.,LTD.

Understanding the chemistry behind Benzophenone-4 allows us to appreciate its value. As a dedicated manufacturer and supplier, we ensure our product meets rigorous standards for purity and performance. We provide Benzophenone-4 with a high assay and consistent properties, backed by comprehensive documentation. Whether for cosmetic applications requiring effective sun protection or industrial uses demanding material stability, our Benzophenone-4 is engineered to deliver. We invite procurement professionals and formulators to explore our offerings and discover how our commitment to quality chemical supply can benefit your products. Contact us to learn more about purchasing Benzophenone-4 and to get a competitive quote.

Conclusion

The chemical science behind Benzophenone-4 makes it an indispensable ingredient for UV protection and formulation stability. Its molecular structure enables efficient UV absorption and remarkable photostability, benefiting a wide array of products from sunscreens to industrial coatings. By understanding these scientific principles, industries can better appreciate the value of this compound and make informed sourcing decisions from trusted suppliers like us.