IRIS

Cerium Oxide and Cerium Compounds

CASRN 1306-38-3 | DTXSID4040214

Noncancer Assessment

Reference Dose for Oral Exposure (RfD) (PDF) (19 pp, 205 K) Last Updated: 09/29/2009
Information reviewed but value not estimated.

 


Reference Concentration for Inhalation Exposure (RfC) (PDF) (19 pp, 205 K) Last Updated: 09/29/2009

System RfC (mg/m3) Basis PoD Composite UF Confidence
Respiratory 9 x 10 -4 Increased incidence of alveolar epithelial hyperplasia in the lungs of male and female rats BMCL (HEC): 0.86
mg/m3
1000 Low

 

Cancer Assessment

Weight of Evidence for Cancer (PDF) (19 pp, 205 K) Last Updated: 09/29/2009

WOE Characterization Framework for WOE Characterization
Inadequate information to assess carcinogenic potential Guidelines for Carcinogen Risk Assessment (U.S. EPA, 2005)
Basis:
  • In accordance with U.S. EPA (2005a) Guidelines for Carcinogen Risk Assessment, there is "inadequate information to assess the carcinogenic potential" of cerium in humans.
  • This may be a synopsis of the full weight-of-evidence narrative.

Quantitative Estimate of Carcinogenic Risk from Oral Exposure (PDF) (19 pp, 205 K)

Not assessed under the IRIS Program.

Quantitative Estimate of Carcinogenic Risk from Inhalation Exposure (PDF) (19 pp, 205 K)

Not assessed under the IRIS Program.

Additional EPA toxicity information may be available by visiting the following sites:

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