List of Final and Proposed Existing Chemical Exposure Limits under TSCA
As part of the Toxic Substances Control Act (TSCA) Section 6 risk management process, EPA may require an Existing Chemical Exposure Limit (ECEL) as part of a Workplace Chemical Protection Program (WCPP) to ensure that workers and others in the workplace, referred to as potentially exposed persons, are protected from serious health risks from inhalation exposures of certain chemicals. EPA has finalized or proposed an ECEL for each of the chemicals listed below.
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Final Existing Chemical Exposure Limits (ECELs)
| Chemical Name | CAS # |
ECELa |
EPA STELb | Notes | Date Promulgated | Relevant Regulation |
|---|---|---|---|---|---|---|
| Asbestos (Chrysotile) | 132207-32-0 | 0.005 fibers/cubic centimeterc | N/A | Learn about conditions of use of asbestos with an interim inhalation exposure limit prior to the effective date of prohibition. | 2024 | Link to final rule. |
| Carbon Tetrachloride (CTC) | 56-23-5 |
|
N/A | Learn about conditions of use of CTC continuing under the WCPP. | 2024 | Link to final rule. |
| Methylene Chloride | 75–09–2 |
|
16 ppm | Learn about conditions of use of methylene chloride continuing under the WCPP. | 2024 | Link to final rule. |
| Perchloroethylene (PCE) |
127-18-4 |
|
N/A | Learn about conditions of use of PCE with inhalation exposure limits under the WCPP. | 2024 | Link to final rule. |
| Trichloroethylene (TCE) | 79-01-6 |
|
N/A | Learn about conditions of use of TCE with an interim inhalation exposure limit prior to the effective date of prohibition. | 2024 | Link to final rule. |
a8-hour time-weighted average.
b15-minute time-weighted average.
cInterim ECEL
Proposed Existing Chemical Exposure Limits (ECELs)
| Chemical Identify |
CAS # | ECELa | EPA STELb | Notes | Date Proposed | Relevant Regulation |
|---|---|---|---|---|---|---|
| 1-Bromopropane (1-BP) | 106-94-5 |
|
N/A | Learn about conditions of use of 1-BP with proposed inhalation exposure limits under the WCPP. | 2024 | Link to proposed rule. |
a8-hour time-weighted average.
b15-minute time-weighted average