Radon

  • Alphatron
  • Niton
  • Radium emanation
Formula
Rn
Structure
Description
Colorless gas. Odorless.
Uses
Medicine (cancer treatment)former use, tracer in leak detection, flow-rate measurement, radiography, chemical research.

Registry Numbers and Inventories.
CAS
10043-92-2
EC (EINECS/ELINCS)
233-146-0
RTECS
VE3750000
RTECS class
Tumorigen
UN (DOT)
2912
Merck
12,8278
Beilstein/Gmelin
16242 (G)

Properties.
Formula
Rn
Formula mass
222.00
Melting point, °C
-71
Boiling point, °C
1737
Critical temperature
104
Critical pressure
62.0
Density
9.73 g/L (0 C) and 760 torr
Solubility in water
230 ml/kg @ 20 C
Viscosity
23.3 pa.s @ 101.32 kPa, 25C
Heat of vaporization
18.0 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not touch damaged packages or spilled material. Cover liquid spill with sand, earth or other noncombustible absorbent material. Cover powder spill with plastic sheet or tarp to minimize spreading. Contact radiation safety officer.
Stability
No data.
Incompatibilities
It has been reported that fluorine reacts with radon, forming radon fluoride.

Fire.
Fire fighting
Presence of radioactive material will not influence the fire control processes and should not influence selection of techniques. Small Fires: Dry chemical, carbon dioxide, water spray or regular foam. Large Fires: Water spray, fog (flooding amounts).
Fire potential
May burn but does not ignite readily.

Health.
Exposure limit(s)
0.2 0.7 pCi/L EPA {indoor < outdoor}
Carcinogin
I-1, N-1
Exposure effects
Supralethal radiation doses may result in headache, acute brain syndrome, alterations in mental status including coma, and (rarely) seizures within minutes of exposure. Prenatal ionizing radiation exposure may cause congenital anomalies, mental retardation, and an increased incidence of seizures.
   Ingestion
Gastrointestinal syndrome (nausea/vomiting) commonly occurs after doses of 9 to 20 gy and may occur following doses as low as 5 gy. Initial vomiting is followed by persistent diarrhea, which may be bloody.
   Inhalation
Pulmonary radiation injury may result in radiation pneumonitis and radiation pulmonary fibrosis.
   Skin
Thermonuclear burns may occur. If erythema is produced by a penetrating radiation, serious systemic injury is certain.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Medical problems take priority over radiological concerns. Use first aid treatment according to the nature of the injury. Do not delay care and transport of a seriously injured person.
   Inhalation
Monitoring exposed patients for contamination and decontamination procedures should be started. All personnel involved in handling patients should wear disposable protective clothing. The patient should be completely undressed and given a soap and water bath or shower (if the patient's condition permits and if the facility exists). Acute inhalation of radionuclides presents some difficult problems.
   Skin
Immediately flush with running water for at least 20 minutes. See Ingestion.
   Eyes
Immediately flush with running water for at least 20 minutes. See Ingestion.

Transport.
UN number
2912
Response guide
Hazard class
7
USCG CHRIS Code
RAL