China D4 Evaluation

In December 2017, the China Ministry of Environmental Protection (the “MEP”) drafted a Catalogue on Prioritized Chemicals (First Batch) which included D4. The silicones industry believes that a D4 risk assessment in China should be completed before any regulatory decisions for D4 are made and requested that D4 be removed from the current draft of China’s priority chemical list. The MEP agreed to the request. The silicones industry provided a proposal to conduct a D4 environmental risk assessment to understand potential risks, if any, associated with release of D4. 

In early 2018, GSC entered into a tri-party agreement with the China Association of Fluorine and Silicone Industry (CAFSI), and the Solid Waste and Chemical Management and Technology Center (SCC), to conduct an environmental risk evaluation on D4 in China. The evaluation will assess the potential risks to environmental organisms from exposure to D4 using appropriate input parameters in applicable models to predict local emissions and the environmental receptor concentrations associated with Chinese facilities that manufacture, process and/or use D4. The evaluation will include a hazard assessment, exposure assessment, risk characterization, and a risk determination for environmental exposure to D4 associated with Chinese facilities that manufacture, process and/or use D4.

The data and information resulting from this assessment should inform the need for prioritization of further assessment or any potential preventive risk management for D4.

The target timeframe for the completion of the risk evaluation is March 2019.