Agent Name

Radon

CAS Number

10043-92-2

Formula

Rn

Major Category

Physical/Radiation

Category

Radionuclides

Description

A naturally occurring gas that is colorless, odorless, and chemically inert; [EPA Radionuclides]

Sources/Uses

Has been used to treat cancer; [EPA Radionuclides]

Comments

Most Important Radionuclide: Radon-222 Source: Decay product of radium-226 in the decay series of uranium-238 Half-Life: 3.8 days Specific Activity: 160,000 Ci/gm Decay Mode: Alpha Critical Organ: Lung Internal Toxicity: High Annual Limit on Intake: 0.1 mCi Radiation Energy (MeV): Alpha 5.49 (100%) + daughters; [See Glossary for references.] See "Radiation, ionizing."

Restricted

One in 15 homes in the USA have levels above 4 pCi/l, the level that EPA recommends homeowners not exceed; [EPA Radionuclides]

Reference Link

ATSDR - Index, Radon Toxicity Case Study

Exposure Assessment
Explanatory Notes

OSHA, MSHA, and ACGIH have set the dose limits for workers exposed to radon daughters at 4 Working Level Months (WLM/year). [ATSDR Case Studies]

Reference Link

ATSDR - ToxFAQs - Radon

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Chemical Information

Search ChemIDplus

Biomedical References

Search PubMed

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: