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Styrene Quickview (CASRN 100-42-5)

Health assessment information on a chemical substance is included in IRIS only after a comprehensive review of toxicity data by U.S. EPA health scientists from several Program Offices, Regional Offices, and the Office of Research and Development.

Disclaimer: This QuickView represents a snapshot of key information. We suggest that you read the IRIS Summary to put this information into complete context.

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Status of Data for Styrene

File First On-Line: 01/31/1987; Last Significant Revision: 11/01/1992

Category (section)
Status
Last Revised
Oral RfD Assessment On-line 09/01/1990
Inhalation RfC Assessment On-line 07/01/1993
Carcinogenicity Assessment No data
Under Re-Assessment
Synonyms
  • 100-42-5
  • Cinnamene
  • Cinnamenol
  • Diarex hf 77
  • Ethenylbenzene
  • Phenylethene
  • Stirolo
  • Styren
  • Styrole
  • UN 2055
  • Phenylethylene
  • more...
Styrene Source Documents
Revision History
Date Section Description
04/01/1997 III., IV., V. Drinking Water Health Advisories, EPA Regulatory Actions, Supplementary Data were removed from IRIS on or before April 1997. IRIS users were directed to the appropriate EPA Program Offices for this information.
Chronic Health Hazard Assessments for Noncarcinogenic Effects

Reference Dose for Chronic Oral Exposure (RfD)

Critical Effect
Point of Departure*
UF RfD
Red blood cell and liver effects NOAEL : 2.00 x102 mg/kg-day 1000 2 x10-1 mg/kg-day

* The Point of Departure listed serves as a basis from which the Oral RfD was derived. See Discussion of Conversion Factors and Assumptions for more details.

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Reference Concentration for Chronic Inhalation Exposure (RfC)

Critical Effect
Point of Departure*
UF RfC
CNS effects NOAEL (HEC): 3.4 x101 mg/m3 30 1 mg/m3

* The Point of Departure listed serves as a basis from which the Inhalation RfC was derived. See Discussion of Conversion Factors and Assumptions for more details.

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Carcinogenicity Assessment for Lifetime Exposure

Quantitative Estimate of Carcinogenic Risk from Oral Exposure

  • Not Assessed under the IRIS Program.

Quantitative Estimate of Carcinogenic Risk from Inhalation Exposure

  • Not Assessed under the IRIS Program.

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