- IRIS Summary (PDF) (20 pp, 147 K)
- Status: Acetaldehyde is not being reassessed by IRIS at this time.
Health Hazard Assessments for Effects Other than Cancer
Reference Dose for Oral Exposure (RfD) (PDF) (20 pp, 147 K)
Not assessed under the IRIS Program.
Reference Concentration for Inhalation Exposure (RfC) (PDF) (20 pp, 147 K)
last updated: 10/01/1991
Weight of Evidence for Cancer (PDF) (20 pp, 147 K)
last updated: 06/30/1988
|WOE Characterization||Framework for WOE Characterization|
|B2 (Probable human carcinogen - based on sufficient evidence of carcinogenicity in animals)||Guidelines for Carcinogen Risk Assessment (US EPA, 1986)|
- Based on increased incidence of nasal tumors in male and female rats and laryngeal tumors in male and female hamsters after inhalation exposure.
- This may be a synopsis of the full weight-of-evidence narrative.
Not Assessed under the IRIS Program.
Inhalation Unit Risk:
2.2 x10 -6 per µg/m3
Extrapolation Method: Linearized multistage-variable exposure input form (extra risk)
Tumor site(s): Respiratory
Tumor type(s): Nasal squamous cell carcinoma or adenocarcinoma (Woutersen and Appleman, 1984)
You will need Adobe Reader to view some of the files on this page. See EPA’s PDF page to learn more.