The science behind making materials appear whiter and brighter is fascinating, driven by continuous innovation in Fluorescent Whitening Agent Technology. NINGBO INNO PHARMCHEM CO.,LTD. is a pioneer in this field, offering the highly effective Optical Brightening Agent 4BK. This advanced stilbene bistriazine derivative embodies cutting-edge technology, designed to absorb invisible ultraviolet light and re-emit it as visible blue light, thereby creating a brilliant, clean white appearance on treated surfaces.
The efficacy of our fluorescent whitening agent lies in its robust properties: strong fluorescence, excellent whitening performance, and exceptional stability. These characteristics make OBA 4BK suitable for a wide array of applications, from enhancing the appeal of cotton and synthetic fabrics to improving the whiteness of detergents and various plastics. As a leading Optical Brightening Agent manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. invests in research and development to ensure our products not only meet but exceed industry standards, providing reliable and consistent results.
Our commitment to advancing Fluorescent Whitening Agent Technology means offering solutions that are both effective and versatile. Optical Brightening Agent 4BK demonstrates high chemical and acid stability, crucial for complex industrial processes, and maintains its performance even when used with strong oxidizing agents like H2O2. If you are looking to purchase high-quality fluorescent whitening agents, NINGBO INNO PHARMCHEM CO.,LTD. provides competitive pricing and robust technical support. Partner with a trusted supplier of OBA 4BK to integrate this superior technology into your products and achieve remarkable aesthetic enhancements.
Manufacturing Facilities






Professional Export Experience
to Global Customers
1. 20 years of R&D, manufacturing and sales experience, serving customers in 60 countries and regions around the world;
2. Own R&D laboratory, pilot platform and large-scale production workshop, which can meet the audit requirements of global customers;
3. We can satisfy customers' perfect transition from small scale lab requirements (gram level) to commercialization requirements (hundred tons level).
A: We don't have Minimum Order Quantity, exact quantity should be provided before quotation for us to calculate the exact cost.
A: We don't provide free samples due to lots of request and expensive international courier's cost, we can deduct the sample charge after commercial order placed.
A: Our payment terms: Small or sample order: T/T IN ADVANCE. Commercial order: First order should be by T/T IN ADVANCE or L/C at sight, and following orders T/T 30~90days is acceptable subject to approval of credit application.