EPA Review of 1,3-Butadiene Highlights Worker Safety Considerations
The U.S. Environmental Protection Agency has completed a risk evaluation of 1,3-butadiene, identifying potential health risks for workers exposed to the chemical in certain industrial environments.
According to the EPA, the risks are associated primarily with inhalation exposure in facilities where the chemical is produced or used to manufacture materials such as rubber, plastics, and chemical intermediates. The agency noted that one of the industrial conditions contributing to the identified risks involves the use of 1,3-butadiene as a reactant in processes that include adhesive manufacturing and synthetic rubber production.
EPA stated that commonly used personal protective equipment in industrial settings can help mitigate these risks. The agency also reported that the evaluation did not identify unreasonable risks for consumers, the general public, or individuals living near manufacturing facilities.
Under the Toxic Substances Control Act, EPA will now move into the rulemaking stage to develop regulations designed to reduce worker exposure to the chemical. The agency indicated that the process will include analysis of health effects, exposure levels, economic considerations, and stakeholder input.
The evaluation also incorporated updated modeling data from the National Emissions Inventory database. According to EPA, the use of more detailed facility-level information allowed the agency to refine its assessment of emission release points and potential exposure conditions.
The agency further incorporated peer-review feedback recommending that cancer risks associated with bladder cancer and leukemia be evaluated together, which resulted in a higher overall cancer risk estimate.
1,3-butadiene is a colorless gas used in the production of many industrial materials, including synthetic rubber, coatings, and adhesives. According to EPA, consumer products typically contain only very small concentrations of the chemical.
The adhesive and sealant industry closely monitors EPA guidance and regulatory developments related to chemical safety. Industry manufacturers and suppliers regularly incorporate updated regulatory information into product formulation, manufacturing practices, and workplace safety procedures to ensure compliance with federal requirements while maintaining high standards for product safety and performance for end users.
Source: EPA / Adhesives & Sealants Magazine