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