#cationic_detergent__invert_soap  a class of synthetic detergents in which the surface-active part of the molecule is the cation
  subtype:  #cetrimide  a cationic detergent that is a powerful disinfectant
  supertype:  #detergent  a surface-active chemical widely used in industry and laundering
     supertype:  #wetting_agent__wettingagent__wetter__surfactant__surface-active_agent  a substance capable of reducing the surface tension of a liquid in which it is dissolved
        supertype:  #chemical_agent  an agent that produces chemical reactions
           supertype:  #agent.causal_agent  a substance that exerts some force or effect
              supertype:  #causal_agent__cause__causal_agency  any entity that causes events to happen
                 supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                    supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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