Sorium
Sorium was an explosive compound used in Ferengi locator bombs, along with argine. 

The detonation of a sorium explosive left distinctive traces of discoloration along the blast perimeter. In 2369, Miles O'Brien found traces of sorium and argine following an assassination attempt on Quark, the new Grand Nagus at the time. ()

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de:Sorium
Chemical compounds
Explosives