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Refractory ceramic fibers Quickview (CASRN NA)

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.

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Status of Data for Refractory ceramic fibers

File First On-Line: 09/01/1992; Last Significant Revision: 09/01/1992

Category (section)
Status
Last Revised
Oral RfD Assessment No data
Inhalation RfC Assessment No data
Carcinogenicity Assessment On-line 07/01/1993
Synonyms
  • Refractory ceramic fibers
  • Ceramic fibers
Refractory ceramic fibers 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)

Not Assessed under the IRIS Program.

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Reference Concentration for Chronic Inhalation Exposure (RfC)

Not Assessed under the IRIS Program.

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Carcinogenicity Assessment for Lifetime Exposure
  • Weight-of-Evidence Characterization
    • B2 (Probable human carcinogen - based on sufficient evidence of carcinogenicity in animals)
  • Weight-of-Evidence Narrative:
    • No human data and sufficient evidence from animal studies. Chronic inhalation studies showed that several types of RCFs induced mesotheliomas and lung tumors in rats and hamsters. Administration of RCFs by intraperitoneal/intrapleural injection or intratracheal instillation also caused peritoneal/pleural mesotheliomas or lung tumors in rats and hamsters.
    • This may be a synopsis of the full weight-of-evidence narrative. See IRIS Summary.

Quantitative Estimate of Carcinogenic Risk from Oral Exposure

  • Information reviewed but value not estimated. See IRIS Summary.

Quantitative Estimate of Carcinogenic Risk from Inhalation Exposure

  • Information reviewed but value not estimated. See IRIS Summary.

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