  Medical radioactive xenon. 
This bottle long ago contained some radioactive xenon-133 intended for medical use.  I'm not sure how it's used medically, perhaps inhaled to irradiate lung cancers?  Feel free to enlighten me. 
Source: Anonymous 
Contributor: Anonymous 
Acquired: 8 March, 2008 
Text Updated: 8 March, 2008 
Price: Donated 
Size: 2" 
Purity: 0% 
Sample Group: Medical
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