Acetaldehyde

Reference Dose for Oral Exposure (RfD) (PDF) (20 pp, 147 K) Last Updated:

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

• 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.

Quantitative Estimate of Carcinogenic Risk from Oral Exposure (PDF) (20 pp, 147 K)

Not Assessed under the IRIS Program.

Inhalation Unit Risk: 2.2 x 10^-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)