EPA Finds 'Unreasonable Risk' in Common Semiconductor Flame Retardant
A draft risk evaluation for TBBPA signals potential restrictions for chemicals used in printed circuit boards.
The Environmental Protection Agency (EPA) has identified significant health and environmental risks associated with a widely used semiconductor flame retardant. These findings could trigger a regulatory shift for the electronics industry, potentially forcing a pivot in how essential hardware is manufactured.
In June 2026, the EPA released a draft risk evaluation for Tetrabromobisphenol A, known as TBBPA, conducted under the authority of the Toxic Substances Control Act (TSCA). The analysis concluded that the chemical poses an "unreasonable risk" to workers through inhalation. Additionally, the agency found that TBBPA presents an unreasonable risk to the environment, specifically citing surface water releases that occur during the processing and disposal of electronics.
The Role of TBBPA
TBBPA is a brominated flame retardant essential to the production of printed circuit boards (PCBs). These boards serve as the foundation for nearly all modern integrated circuits and semiconductor components, where the chemical is used to prevent fires and ensure device safety. Under the TSCA, the EPA is mandated to periodically review such substances to determine if their continued use in commerce creates risks that outweigh their utility.
Industry Implications
Because TBBPA is so deeply integrated into the global electronics supply chain, a formal determination of hazard could force a massive industrial pivot. Manufacturers would be required to identify and implement safer alternatives that maintain the same rigorous fire safety and performance standards. Such a transition often involves significant research and development costs and may require the redesign of existing hardware architectures to accommodate new materials.
Next Steps
The EPA's current findings are part of a draft evaluation, meaning the agency will likely seek public and industry comment before finalizing the risk determination. The industry will be watching closely to see if the EPA moves toward strict usage limits or a total phase-out of TBBPA. Until a final rule is established, the primary focus remains on whether viable, non-hazardous alternatives can be scaled to meet the demands of global semiconductor production. The outcome of this evaluation will likely set a precedent for how other brominated flame retardants are handled under the TSCA framework in the coming years.