The chemical compound with CAS number 1533-45-5, widely recognized as Fluorescent Brightener OB-1, is a marvel of modern chemical engineering. Its primary function as a high-efficiency fluorescent whitening agent makes it an essential component in industries focused on achieving superior whiteness and brightness. This article explores the chemical characteristics and diverse applications of this crucial compound, often sourced from manufacturers in China.

At its core, CAS 1533-45-5 is a stilbene derivative featuring benzoxazole groups. Its molecular formula, C28H18N2O2, and molecular weight of approximately 414.46 g/mol, hint at its complex structure, which is responsible for its unique optical properties. The key to its effectiveness lies in its ability to undergo fluorescence. It absorbs ultraviolet radiation, typically in the range of 340-380 nm, and re-emits this energy as visible light in the blue-violet region of the spectrum (around 430-440 nm). This emitted light effectively masks the natural yellowing of materials, thereby enhancing their perceived whiteness.

The applications for this fluorescent brightener OB-1 are widespread and impactful. In the plastics industry, it is incorporated into polymers like PET, ABS, PS, PP, PVC, and many others to provide a brilliant white finish. Its excellent thermal stability allows it to withstand processing temperatures without degradation, ensuring consistent performance. For the textile industry, it serves as a vital whitening agent for polyester fibers and blends, imparting a clean and vibrant appearance to fabrics. Whether used in masterbatches or direct application, its impact on visual appeal is significant.

When looking to procure CAS 1533-45-5, selecting a reliable chemical supplier is paramount. Companies like NINGBO INNO PHARMCHEM CO.,LTD. are dedicated to providing high-purity grades of this compound, ensuring optimal performance in various applications. The ability to buy fluorescent brightener OB-1 China offers access to cost-effective solutions without compromising on quality, making it an attractive option for global manufacturers. Understanding the CAS number is the first step towards identifying and procuring the right chemical for your specific needs.

In conclusion, CAS 1533-45-5, or Fluorescent Brightener OB-1, is a testament to the power of specialized chemical additives. Its ability to enhance whiteness and brightness through fluorescence makes it an invaluable asset in the production of plastics and textiles, contributing significantly to product quality and consumer satisfaction.