#hydride  any binary compound formed by the union of hydrogen and other elements
  supertype:  #binary_compound  chemical compound composed of only two elements
  subtype:  #hydrazoic_acid__hydrazoicacid__azoimide__hydrogen_azide__HN  a colorless explosive liquid that is volatile and poisonous and foul-smelling
  subtype:  #calcium_hydride__calciumhydride__hydrolith  a salt-like binary compound (CaH2) used as a reducing agent and source of hydrogen
  subtype:  #sodium_hydride  a flammable gray crystalline binary compound (NaH)

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