The reclassification of TPO (diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide by the EHCA (CAS 75980-60-8) is a significant change within the energy curing industry; it directly impacts product formulation, regulatory compliance, and market dynamics.  

TPO has been reclassified as Reproductive Toxicity Category 1B and was added to the EU REACH Candidate List for Authorization as a Substance of Very High Concern (SVHC) on June 14, 2023. This classification is based on its reprotoxic properties under Article 57(c). In response, iGM Resins has updated the EU Safety Data Sheets (SDS) to reflect this change. 

While some industry members may express concerns about reclassification of TPO, these issues must be weighed against the long-term benefits of regulatory alignment with health and environmental goals. At iGM Resins, the company prioritizes the safety of chemicals. The dedicated team of experts at iGM Resins works diligently to ensure that the company’s products comply with regional and international legislation, promoting safer usage across all applications. This commitment reflects iGM Resins' responsibility to its customers, the environment, and the future of the energy curing industry. 

Long-Term Solutions 

iGM Resins is dedicated to providing reliable and durable solutions that meet regional regulations, such as REACH, while addressing the broader future needs of the energy curing industry. Short-term shifts to adjacent chemistries may offer temporary relief but risk becoming regrettable substitutes in the long run, with the potential for future reclassification. iGM Resins explains that its focus remains on developing long-term, effective solutions.

The company’s alternatives to TPO include the following:

Omnirad TPO-L: primarily for clear coatings and digital inks.

Omnirad 380: predominantly used in offset and flexographic inks. By combining Omnirad 380 with synergistic photoinitiators such as Esacure KIP 150, or Esacure KIP 100F, the company enables cost-in-use reduction, high curing effectiveness, and improved color stability with minimized yellowing. 

Omnipol TP: high molecular weight and low migration potential makes the product suitable for use in sensitive applications, offering low shrinkage and high heat resistance properties.

Each application is unique and requires customized adjustment to meet specific needs. The team of experts at iGM Resins is available to assist customers in transitioning to more sustainable solutions that are tailored to fit their needs. 

Future Developments

The reclassification of TPO is seen as an opportunity to innovate and shape the future of the energy curing industry. The team at iGM Resins is focused on developing sustainable, high-performance alternatives that meet regulatory standards while reducing environmental impact. Through advanced R&D, the company aims to combine safety, compliance, and technological excellence in its next-generation photoinitiators. 

Learn more about iGM Resins at https://igmresins.com/en.