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| CAS No.: | 10043-92-2 |
|---|---|
| Name: | Radon |
| Molecular Structure: | |
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| Formula: | Rn |
| Molecular Weight: | 222.017 |
| Synonyms: | Alphatron;Radium emanation |
| EINECS: | 233-146-0 |
| Density: | 9.73 |
| Melting Point: | -71ºC |
| Boiling Point: | -62ºC |
| Flash Point: | °C |
| Solubility: | 22.2ml/100 ml at 20ºC |
| Appearance: | COLOURLESS GAS |
| Transport Information: | UN2982 |
| PSA: | 0.00000 |
| LogP: | -0.38080 |
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Chemistry
Molecular Structure:
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IUPAC Name of Radon (CAS NO.10043-92-2) : radon
Molecular Weight: 222.017571 g/mol
Molecular Formula: Rn
Exact Mass: 222.017571
MonoIsotopic Mass: 222.017571
Heavy Atom Count: 1
Canonical SMILES: [Rn]
InChI: InChI=1S/Rn
InChIKey: SYUHGPGVQRZVTB-UHFFFAOYSA-N
EINECS: 233-146-0
Consensus Reports
NTP 10th Report on Carcinogens.
Safety Profile
A carcinogen. A common air contaminant. Radon is a noble gas and thus is relatively unreactive. Radiation Hazard: Natural isotope 220Rn (Thoron, Thorium Series), T1/2 = 55 seconds, decays to radioactive 216Po by alphas of 6.3 MeV. Natural isotope 222Rn (Uranium Series), T1/2 = 3.8 days, decays to radioactive 218Po by alphas of 5.5 MeV. The permissible levels are given for 222Rn in equilibrium with its daughters. The chief hazard from this isotope is inhalation of the gaseous element and its solid daughters, which are collected on the normal dust of the air. This material is deposited in the lungs and has been considered to be a major causative agent in the high incidence of lung cancer found in uranium miners. Radon and its daughters build up to an equilibrium value in about a month from radium compounds, while the build-up from uranium compounds is negligible. Good ventilation of areas where radium is handled or stored is recommended to prevent accumulation of hazardous concentration of Rn and its daughters. Accumulation of radon in homes has been implicated in increased incidence of lung cancers. This accumulation is found in well-insulated buildings located over land that has concentrations of uranium.
RIDADR: 3321
HazardClass: 7
Specification
Radon (CAS NO.10043-92-2) is also called Alphatron ; HSDB 6369 ; Niton /(222)Radon ; Radium emanation ; Radon, radioactive ; UNII-Q74S4N8N1G . Radon (CAS NO.10043-92-2) is colourless gas. It is radiochemically unstable and chemically unreactive.