HEXAFLUOROPROPYLENE OXIDE (HFPO) DIMER ACID (Gen-X): federal lists and state cleanup levels
- CAS 13252-13-6
- 1 federal list
- 1 state
CAS 13252-13-6 is on one of the three federal lists this handbook carries from Title 40 of the Code of Federal Regulations, Parts 300 to 399, revised as of July 1, 2025: the toxic chemicals for release reporting (40 CFR 372.65). That list's rows for it are below as the regulation prints them. CAS 13252-13-6 is in the cleanup-level tables of one state in this handbook: Pennsylvania (HEXAFLUOROPROPYLENE OXIDE (HFPO) DIMER ACID (Gen-X)). Its numbers are below as its agency prints them. A state that lists the substance under another CAS number, or without one, is not shown here.
Federal lists
Toxic chemicals for release reporting (TRI)
- 40 CFR 372.65(d)
- Revised as of July 1, 2025
40 CFR 372.65(d), the per- and polyfluoroalkyl substances among the toxic chemicals subject to release reporting, lists CAS 13252-13-6 with an effective date for reporting of 1/1/20.
Table 4 to Paragraph (d): (d) Per- and polyfluoroalkyl substances alphabetical listing.
| Chemical name | CASRN1 | Effective date |
|---|---|---|
| Hexafluoropropylene oxide dimer acid | 13252-13-6 | 1/1/20 |
Notes to Table 4 to Paragraph (d): (d) Per- and polyfluoroalkyl substances alphabetical listing., as the regulation prints them
1 CASRN means Chemical Abstracts Service Registry Number.
Pennsylvania
- PA DEP
- Act 2 Statewide Health Standards
- PFAS groundwater table updated 7/10/2024
For HEXAFLUOROPROPYLENE OXIDE (HFPO) DIMER ACID (Gen-X), DEP's PFAS groundwater table prints 0.01 µg/L for residential groundwater in a used aquifer with TDS up to 2500.
- 0.01µg/L R DEP's PFAS groundwater table Used Aquifers, TDS ≤ 2500
All Pennsylvania values for HEXAFLUOROPROPYLENE OXIDE (HFPO) DIMER ACID (Gen-X)
For the federal lists the regulation governs. This page copies the Code of Federal Regulations' annual edition revised as of July 1, 2025, which is kept up to date by the Federal Register; amendments published there since that date are not shown. This page is a reference copy and not a reporting decision. Check the current regulation before relying on a value.
A list with no section on this page has no row with this CAS number. That alone does not put the substance outside the list: the lists also have entries with no CAS number (broad classes, chemical categories, waste streams), which a page filed by CAS number cannot show.
Each agency's own publication governs: its current table, or the published rule where the agency says so. This page is a reference copy and not a cleanup decision. Check each agency's page before relying on a value.
Source
- Environmental Protection Agency, 40 CFR parts 302, 355 and 372, in Title 40 of the Code of Federal Regulations, Parts 300 to 399, revised as of July 1, 2025, as the U.S. Government Publishing Office posts it. File read October 6, 2026.
- Pennsylvania Department of Environmental Protection, Statewide Health Standard Medium-Specific Concentrations.
- PFAS groundwater table: DEP's file dated July 24, 2024, read October 5, 2026.