literal strings: potassium oxide, POTASSIUM OXIDE, Potassium oxide, Potassium Oxide
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- SEAL @173 (93.8%) on 06-dec-2010 [ 1 2 3 4 ] using potassium_oxide
- CPL @126 (50.0%) on 21-jun-2010 [ "corrosive fumes of _" ] using potassium_oxide