Optical Brightener OB-1, chemically known as 2,2'-(1,2-ethenediylbis(4,1-phenylene))bisbenzoxazole and identified by CAS number 1533-45-5, is a highly effective fluorescent whitening agent (FWA). At NINGBO INNO PHARMCHEM CO.,LTD., we recognize its significant contribution to enhancing the visual quality of various materials, particularly in the plastics and textile industries. This article delves into the core properties, diverse applications, and essential considerations for sourcing this vital chemical additive.

The primary appeal of Optical Brightener OB-1 lies in its ability to absorb ultraviolet (UV) light and re-emit it in the blue region of the visible spectrum. This fluorescence effectively masks yellowing and imparts a brighter, cleaner appearance to treated materials. OB-1 is characterized by its yellowish-green crystalline powder form, a high purity assay of typically 98-99%, and a high melting point, generally between 352-358°C. This exceptional thermal stability makes it particularly well-suited for high-temperature processing common in polymer manufacturing.

The versatility of Optical Brightener OB-1 is evident in its broad application range. In the plastics sector, it is extensively used to whiten and brighten polymers such as polyester, nylon, polypropylene (PP), ABS, polystyrene (PS), high impact polystyrene (HIPS), polyamide (PA), polycarbonate (PC), ethylene-vinyl acetate (EVA), and rigid polyvinyl chloride (PVC). Its effectiveness in masking yellowing caused by heat or light degradation makes it invaluable for products requiring a pristine aesthetic. For polyester and nylon fibers, OB-1 provides a brilliant white cast, enhancing their visual appeal in textiles.

When considering the purchase of Optical Brightener OB-1, several factors are crucial for ensuring optimal performance and value. Sourcing from reputable manufacturers like NINGBO INNO PHARMCHEM CO.,LTD. guarantees product consistency, high purity, and reliable performance. Key specifications to consider include the appearance (slight greenish yellow powder), assay (≥98%), melting point (352-358°C), ash content (≤0.5%), and volatile matter (≤0.5%). The optimal dosage typically ranges from 0.005% to 0.2%, depending on the specific substrate and desired effect. It is always recommended to perform sample tests to determine the most effective concentration for your particular application.

NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-quality Optical Brightener OB-1 to meet the evolving needs of the industry. Our product offers a compelling combination of high whitening strength, strong fluorescence, excellent heat resistance, and cost-effectiveness. By choosing NINGBO INNO PHARMCHEM CO.,LTD., you are partnering with a trusted supplier dedicated to enhancing the visual quality and market appeal of your products through reliable chemical solutions.