# 2024-31280: EPA Discovers Plastic Chemical Bad After Only Decades

2024-31280, Diisodecyl Phthalate (DIDP); Risk Evaluation Under the Toxic Substances Control Act (TSCA); Notice of Availability, is a Federal Register notice from an unnamed agency published 2025-01-06, effective Federal Register, Volume 90, Number 3 (Monday, January 6, 2025); PRIA reads it as touching household money (as of 2026-06-08).

- Canonical: https://policyrisk.com/federal-register/2024-31280
- As of: 2026-06-08
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2024-31280
- Title: Diisodecyl Phthalate (DIDP); Risk Evaluation Under the Toxic Substances Control Act (TSCA); Notice of Availability
- Type: Notice
- Agencies: unknown
- Citation: unknown
- Published: 2025-01-06
- Effective: Federal Register, Volume 90, Number 3 (Monday, January 6, 2025)
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-06-08

## In one line

EPA Discovers Plastic Chemical Bad After Only Decades

## Summary

The EPA has finished checking the safety of a chemical called DIDP and found it can harm people’s health. Companies that make, use, or handle DIDP will soon face new rules to keep everyone safe. These changes could affect how DIDP is made and used, so folks should get ready for upcoming actions and possible costs.

## Abstract

The Environmental Protection Agency (EPA or Agency) is announcing the availability of the final risk evaluation under the Toxic Substances Control Act (TSCA) for diisodecyl phthalate (DIDP). The purpose of risk evaluations under TSCA is to determine whether a chemical substance presents an unreasonable risk of injury to health or the environment, without consideration of costs or non-risk factors, including unreasonable risk to potentially exposed or susceptible subpopulations identified as relevant to the risk evaluation by EPA, under the conditions of use. EPA used the best available science to prepare this final risk evaluation and determined, based on the weight of scientific evidence, that DIDP poses unreasonable risk to human health. Under TSCA, EPA must initiate risk management actions to address the unreasonable risk.

## Effects PRIA read

- Workplace Health Risk for Female Workers: cost, high. If you are a female worker of reproductive age, EPA determined that DIDP can cause non-cancer developmental harm (reduced offspring survival) from acute inhalation exposures. EPA found an unreasonable risk to human health based on developmental toxicity in laboratory studies.
- Manufacturers/Users Face TSCA Rules: cost, medium. Because EPA found DIDP presents an unreasonable risk, EPA must initiate risk management under TSCA section 6(a). If your company manufactures, processes, distributes, uses, or disposes of DIDP, expect proposed regulatory actions and opportunities for public comment.
- Spray Applications Likely Targeted: cost, medium. EPA identified that acute inhalation during spray application of certain DIDP-containing products contributes to the unreasonable risk. If you spray adhesives and sealants; paints and coatings; lacquers, stains, varnishes, and floor finishes; or penetrants and inspection fluids, EPA expects to focu…

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## Sources
- [2024-31280 on federalregister.gov](https://www.federalregister.gov/documents/2025/01/06/2024-31280/diisodecyl-phthalate-didp-risk-evaluation-under-the-toxic-substances-control-act-tsca-notice-of)
- [2024-31280 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-01-06/pdf/2024-31280.pdf)

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- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2024-31280 (as of 2026-06-08).