IRIS Toxicological Review for Acrylamide (Interagency Science Discussion Draft)
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Abstract
EPA is releasing the draft report, Toxicological Review for Acrylamide, that was distributed to Federal agencies and White House Offices for comment during the Science Discussion step of the IRIS Assessment Development Process. Comments received from other Federal agencies and White House Offices are provided below with external peer review panel comments.
The draft Toxicological Review of Acrylamide provides scientific support and rationale for the hazard identification and dose-response assessment pertaining to a chronic exposure to acrylamide.
Acrylamide is a chemical used in the production of polyacrylamide polymers. Polyacrylamides are used as a flocculent in water purification, oil recovery, and soil conditioning and stabilization. Other uses include paper making, adhesion-promotion, dye acceptors, and textile additives. Human exposure to acrylamide had been thought to occur primarily in the workplace from dermal contact and inhalation of dust and vapor, with the general public being potentially exposed to low levels of acrylamide primarily through contaminated drinking water.
In addition, the draft toxicological review notes that cigarette smoke (direct and secondary) is another exposure route. In early 2002, Swedish scientists reported high concentrations of acrylamide in certain fried, baked, and deep-fried foods. Subsequent research demonstrated that acrylamide forms de novo during processing of some foods, especially during high temperature cooking of carbohydrate-rich foods that contain asparagine.
This assessment contains the derivation of a chronic reference dose (RfD) and a chronic reference concentration (RfC) for non-cancer effects, as well as an oral slope factor and an inhalation unit risk for carcinogenic effects.
The draft Toxicological Review of Acrylamide provides scientific support and rationale for the hazard identification and dose-response assessment pertaining to a chronic exposure to acrylamide.
Acrylamide is a chemical used in the production of polyacrylamide polymers. Polyacrylamides are used as a flocculent in water purification, oil recovery, and soil conditioning and stabilization. Other uses include paper making, adhesion-promotion, dye acceptors, and textile additives. Human exposure to acrylamide had been thought to occur primarily in the workplace from dermal contact and inhalation of dust and vapor, with the general public being potentially exposed to low levels of acrylamide primarily through contaminated drinking water.
In addition, the draft toxicological review notes that cigarette smoke (direct and secondary) is another exposure route. In early 2002, Swedish scientists reported high concentrations of acrylamide in certain fried, baked, and deep-fried foods. Subsequent research demonstrated that acrylamide forms de novo during processing of some foods, especially during high temperature cooking of carbohydrate-rich foods that contain asparagine.
This assessment contains the derivation of a chronic reference dose (RfD) and a chronic reference concentration (RfC) for non-cancer effects, as well as an oral slope factor and an inhalation unit risk for carcinogenic effects.
Impact/Purpose
The IRIS Toxicological Review of Acrylamide provides scientific support and rationale for the hazard identification and dose-response assessment pertaining to a chronic exposure to acrylamide.
Status
Now that the interagency review draft has been completed and finalized, this assessment has been loaded into the IRIS Web site and Database.
Citation
U.S. EPA. IRIS Toxicological Review for Acrylamide (Interagency Science Discussion Draft) . U.S. Environmental Protection Agency, Washington, DC, EPA/635/R-07/009D, 2010.
History/Chronology
| Date | Description |
|---|---|
| Nov 2007 | EPA releases the external review draft for public review. [Federal Register Dec 28, 2007] |
| Feb 2008 | SAB announces 2 external peer review meetings (first a public teleconference to be held on Feb 20, 2008 , and second a face-to-face meeting March 10 -12, 2008). [Federal Register Notice Feb 1, 2008] |
| Dec 2008 | SAB finalizes their review report of the Toxicological Review of Acrylamide. |
| Feb 2010 | EPA hosted an interagency science discussion on the review of the draft Toxicological Review of Acrylamide. |
| Mar 2010 | EPA released the comments from the external review workshop. |
| Mar 2010 | EPA released the final Toxicological Review and IRIS Summary for Acrylamide and the interagency review draft with interagency review comments. |
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.
- IRIS Toxicological Review of Acrylamide (Interagency Science Discussion Draft) (PDF) (454 pp, 3 MB, about PDF)
- OMB Staff Comments on Acrylamide Final draft Tox Review and Final Draft IRIS Summary (PDF) (3 pp, 72 KB, about PDF)
- SAB Review of EPA’s draft entitled “Toxicological Review of Acrylamide”. (PDF) (80 pp, 588 KB, about PDF)