How EPA Reviews Mixed Metal Oxides Used in Battery Cathode Active Materials

Short summary

The EPA released standardized guidance for reviewing mixed metal oxides in lithium-ion battery cathodes, proposing a rule with mandatory 99% dust controls, worker monitoring, recycling restrictions, and hazardous waste disposal requirements. Comments are due May 26, 2026, and apply to battery material manufacturers, importers, and recyclers. The rule exempts incorporated substances unless dust exposure occurs during end-of-life processing.

• •EPA standardizing TSCA review of mixed metal oxides (MMOs) used in battery cathode active materials
• •Proposed rule mandates 99% dust capture, worker exposure monitoring, no water release, RCRA Subtitle C disposal
• •Comments deadline May 26, 2026; applies to manufacturers, importers, processors, and recyclers of MMO cathode materials

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