Photoinitiator 907 (CAS 71868-10-5) is a cornerstone of UV curing technology, functioning as a highly efficient Type I free radical photoinitiator. Understanding its chemical properties and mechanism is key to leveraging its full potential. NINGBO INNO PHARMCHEM CO.,LTD., as a prominent supplier in China, provides this vital component for diverse industrial needs.

At its core, Photoinitiator 907 operates through a process known as Norrish Type I photocleavage. Upon absorption of UV light, the initiator molecule undergoes fragmentation, directly generating reactive free radicals. This direct generation of radicals is what classifies it as a Type I photoinitiator, making it highly efficient for initiating the polymerization of monomers and oligomers in UV-curable formulations. These free radicals then attack the double bonds of monomers, starting a chain reaction that leads to the rapid formation of a cross-linked polymer network – the cured material.


The chemical structure of Photoinitiator 907 is designed for optimal UV absorption, typically in the range of 230-330 nm, allowing it to efficiently capture the energy required for radical generation. Its high molar absorptivity means that even at low concentrations, it can effectively initiate polymerization. This efficiency is crucial for applications like UV-curable inks, where rapid drying is essential for high-speed printing. The ability to buy Photoinitiator 907 from a reliable supplier like NINGBO INNO PHARMCHEM CO.,LTD. ensures that manufacturers have access to a consistent and effective chemical for their critical processes.


A significant advantage of Photoinitiator 907 is its performance in colored systems. Pigments, while essential for color, can impede UV light penetration. However, Photoinitiator 907's efficient absorption and radical generation capability allow it to overcome this challenge, ensuring effective curing even in heavily pigmented coatings and inks. Furthermore, its inherent stability contributes to a longer shelf life for the formulated products, with minimal yellowing over time, a critical factor for maintaining product aesthetics and performance, especially in clear coats and light-colored applications.


NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-quality Photoinitiator 907 that meets stringent industry standards. Our product is meticulously manufactured to ensure purity and consistent performance. By understanding the chemistry behind Photoinitiator 907, manufacturers can better optimize their formulations for demanding applications in coatings, inks, adhesives, and more, reinforcing its role as a key chemical in modern manufacturing.