{"abstract":"The Environmental Protection Agency (EPA or Agency) is announcing the availability of and seeking public comment on draft risk evaluations under the Toxic Substances Control Act (TSCA) for 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta [g]-2-benzopyran (HHCB) and phthalic anhydride. 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 under the conditions of use (COUs), including unreasonable risk to potentially exposed or susceptible subpopulations identified as relevant to the risk evaluation by EPA, and without consideration of costs or non-risk factors. EPA is seeking comment on the draft risk evaluations for HHCB and phthalic anhydride.","action":"Notice.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/04/14/2026-07167.html","cfr_references":[],"citation":"91 FR 19134","comment_url":"http://www.regulations.gov/commenton/EPA-HQ-OPPT-2018-0459-0071","comments_close_on":"2026-06-15","correction_of":null,"corrections":[],"dates":"Comments must be received on or before June 15, 2026.","disposition_notes":null,"docket_ids":["EPA-HQ-OPPT-2018-0430","EPA-HQ-OPPT-2018-0459","FRL-13309-01-OCSPP"],"dockets":[{"supporting_documents":[{"title":"34. HHCB. Draft KABAM Modeling Cover Letter. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0098"},{"title":"33. Draft Summary of Toxics Release Inventory (TRI) Water Releases. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0097"},{"title":"32. HHCB. Draft Consumer Exposure Modeling Cover Letter. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0096"},{"title":"31. HHCB. Draft Water Quality Portal Report. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0095"},{"title":"30. HHCB. Draft Occupational Exposure Modeling Cover Letter. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0094"},{"title":"27. HHCB. Draft Commercial Down-the-Drain POTW Release Calculations. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0091"},{"title":"25. HHCB. Draft POTW Release Scenario Development. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0089"},{"title":"24. HHCB. Draft Surface Water Human Exposure Risk Calculator. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0088"},{"title":"21. HHCB. Draft Fish Ingestion Risk Calculator. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0085"},{"title":"20. HHCB. Draft Aggregate Chronic Risk Calculator. Public Release. March 2026","document_id":"EPA-HQ-OPPT-2018-0430-0084"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2026-04-14","updated_at":"2026-04-14T10:00:31.695-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-HQ-OPPT-2018-0430-0064","allow_late_comments":false,"id":"EPA-HQ-OPPT-2018-0430-0064","comment_end_date":"2026-06-16","regulations_dot_gov_open_for_comment":true}],"supporting_documents_count":45,"id":"EPA-HQ-OPPT-2018-0430","title":"1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8- hexamethylcyclopenta [y]-2-benzopyran (HHCB); TSCA Review"},{"supporting_documents":[{"title":"42. Email from the Institute of In Vitro Sciences (IIVS) on the Skin Sensitization of Phthalic Anhydride (2026)","document_id":"EPA-HQ-OPPT-2018-0459-0113"},{"title":"38. Email from Delsi Corporation on the use of phthalic anhydride in petroleum lubricating oil and grease manufacturing for the draft risk evaluation (2025)","document_id":"EPA-HQ-OPPT-2018-0459-0109"},{"title":"37. Email from Harris on the use of phthalic anhydride in paint and coating products for the draft risk evaluation (2025)","document_id":"EPA-HQ-OPPT-2018-0459-0108"},{"title":"35. Email from Henkel on the use of phthalic anhydride in water filtration activities for the draft risk evaluation (2025)","document_id":"EPA-HQ-OPPT-2018-0459-0106"},{"title":"32. Meeting with Stepan Company to discuss data submission on phthalic anhydride on March 11, 2026","document_id":"EPA-HQ-OPPT-2018-0459-0103"},{"title":"29. Meeting with American Chemistry Council (ACC) and EPA to discuss industry's use of phthalic anhydride on August 18, 2025","document_id":"EPA-HQ-OPPT-2018-0459-0100"},{"title":"26. Draft Supplemental Information on the Dosimetric Analyses Using the MPPD and ICRP Models for the Draft Human Health Hazard Assessment for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0097"},{"title":"25. Draft Point Source Calculator Files for the Draft Environmental Media and General Population and Environmental Exposure Assessment for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0096"},{"title":"21. Draft Ambient Air IIOAC Exposure Results and Risk Calculations for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0092"},{"title":"19. Draft Occupational Exposure Calculator for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0090"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2026-04-14","updated_at":"2026-04-14T10:00:31.361-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-HQ-OPPT-2018-0459-0071","allow_late_comments":false,"id":"EPA-HQ-OPPT-2018-0459-0071","comment_end_date":"2026-06-16","regulations_dot_gov_open_for_comment":true}],"supporting_documents_count":65,"id":"EPA-HQ-OPPT-2018-0459","title":"Phthalic anhydride; TSCA Review"}],"document_number":"2026-07167","effective_on":null,"end_page":19136,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/04/14/2026-07167.xml","html_url":"https://www.federalregister.gov/documents/2026/04/14/2026-07167/134678-hexahydro-466788-hexamethylcyclopenta-g-2-benzopyran-hhcb-and-phthalic-anhydride-draft-risk","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-07167?publication_date=2026-04-14","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-04-14/2026-07167/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":247,"last_updated":"2026-04-16 14:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-04-14/pdf/2026-07167.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-07167.pdf?1776084314","publication_date":"2026-04-14","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/04/14/2026-07167.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"42. Email from the Institute of In Vitro Sciences (IIVS) on the Skin Sensitization of Phthalic Anhydride (2026)","document_id":"EPA-HQ-OPPT-2018-0459-0113"},{"title":"38. Email from Delsi Corporation on the use of phthalic anhydride in petroleum lubricating oil and grease manufacturing for the draft risk evaluation (2025)","document_id":"EPA-HQ-OPPT-2018-0459-0109"},{"title":"35. Email from Henkel on the use of phthalic anhydride in water filtration activities for the draft risk evaluation (2025)","document_id":"EPA-HQ-OPPT-2018-0459-0106"},{"title":"32. Meeting with Stepan Company to discuss data submission on phthalic anhydride on March 11, 2026","document_id":"EPA-HQ-OPPT-2018-0459-0103"},{"title":"29. Meeting with American Chemistry Council (ACC) and EPA to discuss industry's use of phthalic anhydride on August 18, 2025","document_id":"EPA-HQ-OPPT-2018-0459-0100"},{"title":"26. Draft Supplemental Information on the Dosimetric Analyses Using the MPPD and ICRP Models for the Draft Human Health Hazard Assessment for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0097"},{"title":"25. Draft Point Source Calculator Files for the Draft Environmental Media and General Population and Environmental Exposure Assessment for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0096"},{"title":"21. Draft Ambient Air IIOAC Exposure Results and Risk Calculations for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0092"},{"title":"18. Draft Consumer Exposure Analysis and Risk Calculator for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0089"},{"title":"14. Draft Environmental Media, General Population, and Environmental Exposure for Phthalic Anhydride","document_id":"EPA-HQ-OPPT-2018-0459-0085"}],"comments_count":0,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OPPT-2018-0459","supporting_documents_count":65,"docket_id":"EPA-HQ-OPPT-2018-0459","document_id":"EPA-HQ-OPPT-2018-0459-0071","regulation_id_number":null,"title":"Phthalic anhydride; TSCA Review","checked_regulationsdotgov_at":"2026-04-15T12:55:06Z"},"regulations_dot_gov_url":"http://www.regulations.gov/commenton/EPA-HQ-OPPT-2018-0459-0071","significant":null,"signing_date":null,"start_page":19134,"subtype":null,"title":"1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-Hexamethylcyclopenta [g]-2-Benzopyran (HHCB) and Phthalic Anhydride Draft Risk Evaluations Under the Toxic Substances Control Act (TSCA); Notice of Availability and Request for Comment","toc_doc":"Risk Evaluations for Chemical Substances","toc_subject":null,"topics":[],"type":"Notice","volume":91}