Freon-22. 
Freon-22 is Chlorodifluoromethane, or CHClF2.  Not quite as much fluorine as Teflon, but still quite a bit of it.  This sample isn't exactly in the table, but it's over the table, in the air-conditioning system on the roof of our building. 
Source: Ed Pegg Jr 
Contributor: Ed Pegg Jr 
Acquired: 11 September, 2002 
Text Updated: 20 November, 2008 
Price: $0 
Size: 18" 
Purity: 44%
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