Aldrin

CASRN 309-00-2

  • IRIS Summary (PDF) (14 pp, 121 K)
  • Status: Aldrin is not being reassessed by IRIS at this time.

Health Hazard Assessments for Effects Other than Cancer


Reference Dose for Oral Exposure (RfD) (PDF) (14 pp, 121 K) last updated: 03/31/1987

RfD (mg/kg-day) System Basis PoD Composite UF Confidence
3 x10-5 Hepatic Liver toxicity LOAEL : 2.5 x10-2
mg/kg-day
1000 Medium

Reference Concentration for Inhalation Exposure (RfC) (PDF) (14 pp, 121 K)
Not assessed under the IRIS Program.

Cancer Assessment


Weight of Evidence for Cancer (PDF) (14 pp, 121 K) last updated: 09/30/1987

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)
Basis:
  • Orally administered aldrin produced significant increases in tumor responses in three different strains of mice in both males and females. Tumor induction has been observed for structurally related chemicals, including dieldrin, a metabolite.
  • This may be a synopsis of the full weight-of-evidence narrative.

Quantitative Estimate of Carcinogenic Risk from Oral Exposure (PDF) (14 pp, 121 K)

Oral Slope Factor: 1.7 x10 1 per mg/kg-day
Drinking Water Unit Risk: 4.9 x10 -4 per µg/L
Extrapolation Method: Linearized multistage procedure, extra risk
Tumor site(s): Hepatic
Tumor type(s): Liver carcinoma (Davis, 1965, NCI, 1978)


Quantitative Estimate of Carcinogenic Risk from Inhalation Exposure (PDF) (14 pp, 121 K)

Inhalation Unit Risk: 4.9 x10 -3 per µg/m3
Extrapolation Method: Linearized multistage procedure, extra risk
Tumor site(s): Hepatic
Tumor type(s): Liver carcinoma (Davis, 1965, NCI, 1978)


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