Risk Evaluation for 1-Bromopropane (1-BP)
1-Bromopropane (1-BP) is currently undergoing risk evaluation under the Toxic Substances Control Act (TSCA). EPA is evaluating 1-BP because the 2016 amendments to TSCA directed EPA to pick its first ten chemicals for evaluation from the TSCA Work Plan, and 1-BP is on the Work Plan. In August 2019, EPA released the draft risk evaluation for 1-BP.
In the draft risk evaluation for 1-BP, EPA did not find unreasonable risk to the environment under any condition of use. The draft risk evaluation for 1-BP shows there could be unreasonable risks to workers, occupational non-users, and consumers under certain conditions of use. These initial determinations may change as our evaluation becomes more refined through the public and peer review process.
On this page:
- Chemical Description of 1-BP
- Conditions of Use Included in the Draft Risk Evaluation, Problem Formulation, and Scope
- Draft Risk Evaluation
- Review of 1-BP prior to Amended TSCA
1-BP is used as a solvent, including in degreasing operations, spray adhesives and dry cleaning, in several industries. 1-BP is also used as reactant in the manufacturing of other chemical substances. Consumer uses of 1-BP include several applications including aerosol degreaser, spot cleaner and stain removers, and in insulation for building and construction materials. 2016 Chemical Data Reporting data shows the total manufactured volume, including imports, was nearly 26 million pounds of 1-BP in the U.S in 2015.
In the draft risk evaluation, EPA evaluated 25 conditions of use associated with the manufacturing (including import), processing, distribution, use, and disposal of 1-BP. Uses include the following:
- Adhesives and sealants
- Cleaning and furniture care products
- Dry cleaning solvents
- Spot cleaners
- Arts and crafts products
- Automotive care products
- Mold cleaning products
In June 2017, EPA released the scope document for 1-BP which included the hazards, exposures, conditions of use, and the potentially exposed or susceptible subpopulations EPA expected to consider in its risk evaluation of 1-BP conducted pursuant to TSCA Section 6(b)(4). In June 2018, EPA released the problem formulation for 1-BP which refined the scope of the 1-BP risk evaluation by clarifying the chemical conditions of use that EPA expected to evaluate and describing how EPA expected to conduct the evaluation.
After releasing the scope documents, the dockets for each of the first 10 chemicals were open for public comments. Read EPA’s Responses to Public Comments Received on the Scope Documents for the First Ten Chemicals for Risk Evaluation under TSCA. This document addresses cross-cutting public comments received in response to EPA publishing the scope documents.
Draft Risk Evaluation
In August 2019, EPA released the draft risk evaluation for 1-BP. The draft risk evaluation is available for public comment in docket EPA-HQ-OPPT-2019-0235 until October 11, 2019.
Review of 1-BP Prior to Amended TSCA
Prior to the Frank R. Lautenberg Chemical Safety for the 21st Century Act, EPA completed a draft risk assessment for 1-BP in 2016, addressing occupational and consumer uses in spray adhesives, dry-cleaning (including spot cleaners), and degreasing operations and published the following information:
- Draft Assessment
- Peer Review Plan
- Peer Review Charge Questions (Draft)
- Public Comments (Docket: EPA-HQ-OPPT-2015-0084)
- Model Averaging for Dichotomous Response Benchmark Dose (MADr-BMD) Tool
- Fact Sheet on 1-BP