Jump to main content.

IRIS Toxicological Review of 1,2,3-Trichloropropane (External Review Draft)

Archive disclaimer
Archived files are provided for reference purposes only. The file was current when produced, but is no longer maintained and may now be outdated. Persons with disabilities having difficulty accessing archived files may contact the NCEA Webmaster for assistance. Please visit http://epa.gov/ncea to access current information.

Martin Gehlhaus
by phone at:   703-347-8579
by email at:  gehlhaus.martin@epa.gov
EPA conducted a peer review of the scientific basis supporting the human health hazard and dose-response assessment of 1,2,3-trichloropropane (TCP) that once finalized will appear on the Integrated Risk Information System (IRIS) database. Peer review is meant to ensure that science is used credibly and appropriately in derivation of the dose-response assessments and toxicological characterization.

Downloads/Related Links

This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.

Public Comments

Comments on the assessment may be submitted and reviewed using the e-Government Regulations.gov Web site. From the site, select Environmental Protection Agency and the key word EPA- HQ-ORD-2007-1083 (for the docket ID).

The draft Toxicological Review of 1,2,3-Trichloropropane provides scientific support and rationale for the hazard identification and dose-response assessment pertaining to chronic exposure to 1,2,3-trichloropropane. 1,2,3-Trichloropropane is an important industrial chemical used as a solvent for oils and fats, waxes, and resins, and has also been used in paint thinner and varnish remover and as a degreasing agent. 1,2,3-Trichloropropane is also generated as a by-product of the production of other chlorinated compounds such as epichlorohydrin, and is used as an intermediate in the production of some pesticides and polymers, such as polysulfide rubbers.

This assessment contains the derivation of a chronic reference dose and a chronic reference concentration, as well as a cancer characterization and the derivation of an oral slope factor.


2003EPA began reviewing the toxicological assessment of 1,2,3-trichloropropane.
Nov 2007EPA released an External Review Draft for public comment and review.
Jan 2008EPA announces the external peer review panel meeting in a Jan 18, 2008 Federal Register Notice.
Sep 2009EPA released the Final Toxicological Review (PDF) (247 pp, 1.9M) and accompanying Summary for 1,2,3-Trichloropropane to the IRIS Web site.

Next Steps

Following the public review and comment period, the draft Toxicological Review will be reviewed by an external expert peer review meeting, to be announced in a proceeding Federal Register Notice.


U.S. EPA. IRIS Toxicological Review of 1,2,3-Trichloropropane (External Review Draft). U.S. Environmental Protection Agency, Washington, DC, NCEA-S-1669.

Recent Additions | Advanced Search | IRIS Home | NCEA Home | ORD Home

Local Navigation

Jump to main content.