IRIS

Dibutyl phthalate (DBP)

Noncancer Assessment

Reference Dose for Oral Exposure (RfD) (PDF) (11 pp, 107 K) Last Updated: 01/31/1987

System RfD (mg/kg-day) Basis PoD Composite UF Confidence
Other 1 x 10 -1 Increased mortality NOAEL : 1.25 x 102
mg/kg-day 		1000 Low

 

Reference Concentration for Inhalation Exposure (RfC) (PDF) (11 pp, 107 K) Last Updated: 10/01/1990
Information reviewed but value not estimated.

 

Cancer Assessment

Weight of Evidence for Cancer (PDF) (11 pp, 107 K) Last Updated: 09/07/1988

WOE Characterization Framework for WOE Characterization
D (Not classifiable as to human carcinogenicity) Guidelines for Carcinogen Risk Assessment (U.S. EPA, 1986)
Basis:
  • Pertinent data regarding carcinogenicity was not located in the available literature.
  • This may be a synopsis of the full weight-of-evidence narrative.

Quantitative Estimate of Carcinogenic Risk from Oral Exposure (PDF) (11 pp, 107 K)

Not assessed under the IRIS Program.

Quantitative Estimate of Carcinogenic Risk from Inhalation Exposure (PDF) (11 pp, 107 K)

Not assessed under the IRIS Program.

Program Outlook Details

Public Assessment Materials Date
Preliminary Assessment Materials/Systematic Review Protocol Jan-2015
Discontinued Dec-2018

Note: The dibutyl phthalate (dbp) (re)assessment has been discontinued. A new/updated assessment will not be added to the IRIS database at this time.

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

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Chemical Structure for
Dibutyl phthalate (DBP)

Dibutyl phthalate (DBP)

Synonyms

  • Benzene-o-dicarboxylic acid di-n-butyl ester
  • Butylphthalate
  • Celluflex DPB
  • DPB
  • Di-n-butylphthalate

    • more synonyms