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Radon 222 (CASRN 14859-67-7)
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0275
Radon 222;
CASRN 14859-67-7
Health assessment information on a chemical substance is included in IRIS
only after a comprehensive review of chronic toxicity data by U.S. EPA
health scientists from several Program Offices and the Office of Research
and Development. The summaries presented in Sections I and II represent
a consensus reached in the review process. Background information and
explanations of the methods used to derive the values given in IRIS are
provided in the Background Documents.
STATUS OF DATA FOR Radon 222
File First On-Line 09/30/1987
Category (section) |
Status |
Last Revised |
|---|---|---|
| Oral RfD Assessment (I.A.) | no data | |
| Inhalation RfC Assessment (I.B.) | no data | |
| Carcinogenicity Assessment (II.) | withdrawn | 07/01/1993 |
_I. Chronic Health Hazard Assessments for Noncarcinogenic Effects
_I.A. Reference Dose for Chronic Oral Exposure (RfD)
Substance Name — Radon 222
CASRN — 14859-67-7
Not available at this time.
_I.B. Reference Concentration for Chronic Inhalation Exposure (RfC)
Substance Name — Radon 222
CASRN — 14859-67-7
Not available at this time.
_II. Carcinogenicity Assessment for Lifetime Exposure
Substance Name — Radon 222
CASRN — 14859-67-7
The carcinogen assessment summary for this substance has been withdrawn following further review. A new carcinogen summary is in preparation by the CRAVE Work Group.
Agency Work Group Review — 12/17/1986, 11/30/1988, 03/01/1989, 05/04/1989, 10/21/1992, 02/02/1993, 03/31/1993
Screening-Level Literature Review Findings — A screening-level review conducted by an EPA contractor of the more recent toxicology literature pertinent to the cancer assessment for Radon 222 conducted in September 2002 did not identify any critical new studies. IRIS users who know of important new studies may provide that information to the IRIS Hotline at hotline.iris@epa.gov or (202)566-1676.
EPA Contacts:
Please contact the IRIS Hotline for all questions concerning this assessment or IRIS, in general, at (202)566-1676 (phone), (202)566-1749 (FAX) or hotline.iris@epa.gov (internet address).
_III.
[reserved]
_IV. [reserved]
_V. [reserved]
_VI. Bibliography
Substance Name — Radon 222
CASRN — 14859-67-7
Not available at this time.
_VII. Revision History
Substance Name — Radon 222
CASRN — 14859-67-7
|
Date |
Section |
Description |
|---|---|---|
| 03/01/1988 | II.A.1. | Classification clarified |
| 03/01/1988 | II.B.1. | Number rounded off |
| 06/30/1988 | II.D.3. | Contacts changed |
| 01/01/1989 | II. | Withdrawn pending further review |
| 07/01/1989 | II. | Withdrawn; new assessment verified (in preparation) |
| 01/01/1992 | IV. | Regulatory actions updated |
| 11/01/1992 | II. | Work group review date added |
| 03/01/1993 | II. | Work group review date added |
| 05/01/1993 | II. | Work group review date added |
| 07/01/1993 | II. | EPA contact changed |
| 08/01/1995 | II. | EPA's RfD/RfC and CRAVE workgroups were discontinued in May, 1995. Chemical substance reviews that were not completed by September 1995 were taken out of IRIS review. The IRIS Pilot Program replaced the workgroup functions beginning in September, 1995. |
| 04/01/1997 | III., IV., V. | Drinking Water Health Advisories, EPA Regulatory Actions, and Supplementary Data were removed from IRIS on or before April 1997. IRIS users were directed to the appropriate EPA Program Offices for this information. |
| 12/03/2002 | II. | Screening-Level Literature Review Findings message has been added. |
_VIII. Synonyms
Substance Name — Radon 222
CASRN — 14859-67-7
Last Revised — 09/30/1987
- 14859-67-7
- Radon 222
- Radon, isotope of mass 222