Photoinitiator 819, chemically identified as Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide and carrying the CAS number 162881-26-7, is a highly sought-after chemical intermediate in the advanced materials sector. Its specialized properties make it a cornerstone for efficient UV curing across a multitude of industrial applications. Understanding its technical profile and market relevance is crucial for professionals involved in chemical procurement and product development.

From a technical standpoint, Photoinitiator 819 is typically supplied as a pale yellow powder with a high purity assay, often exceeding 99.0%. Its melting point, generally between 131-135°C, and low volatile matter content (typically ≤0.3%) indicate a stable and reliable compound. The molecular formula C26H27O3P and molecular weight of 418.46 provide essential details for formulation calculations. These specifications are critical for formulators who need to buy precise quantities to achieve predictable curing outcomes in their UV-curable coatings, inks, adhesives, and composites.

The versatility of Photoinitiator 819 is evident in its broad application spectrum. It is particularly valued for its efficiency in initiating free radical polymerization, especially in challenging scenarios. This includes high-opacity white paints, colored inks, and thick film systems, where its strong light absorption capabilities ensure thorough curing. Furthermore, its compatibility with other photoinitiators and UV stabilizers allows for synergistic effects, enhancing properties like weather resistance and cure speed. Its utility in 3D printing resins and for UV LED curing applications further underscores its importance in modern manufacturing technologies. For those looking to buy this essential chemical, its wide applicability makes it a strategic investment.

The market demand for Photoinitiator 819 continues to grow, driven by the expanding use of UV curing technology across various industries. As environmental regulations push for lower VOC emissions and more energy-efficient processes, UV curing offers a compelling solution, and Photoinitiator 819 plays a pivotal role in its success. Manufacturers and distributors who can reliably supply this high-quality photoinitiator are well-positioned to serve this expanding market. As a leading supplier, we are equipped to meet this demand, offering competitive pricing and a commitment to product integrity.

For procurement professionals and research scientists aiming to leverage the benefits of Photoinitiator 819, partnering with a knowledgeable and dependable supplier is paramount. We encourage you to reach out to us to discuss your specific requirements, receive detailed product information, and obtain competitive quotes. Understanding the precise properties and market dynamics of Photoinitiator 819 will empower you to make informed decisions and drive innovation in your product development efforts.