text: Ammonium perrhenate is weak oxidizer. It slowly reacts with hydrochloric acid:
  :NHReO + 6 HCl → NH[ReClO] + Cl ↑ + 3HO.
  It is reduced to metallic Re upon heating under hydrogen:
  :2 NHReO + 7 H → 2 Re + 8 HO + 2 NH
  Ammonium perrhenate decomposes to volatile ReO starting at 250 °C. When heated in a sealed tube at 500 °C, It decomposes to rhenium dioxide:
  :2NHReO → 2ReO + N + 4 HO
  The ammonium ion can be displaced with some concentrated nitrates e.g. potassium nitrate,, silver nitrate, etc.:
  :NHReO + KNO → KReO ↓ + NHNO
  It can be reduced to nonahydridorhenate with sodium in ethanol:
  :NHReO + 18Na + 13CHOH → Na[ReH] + 13NaCHO + 3NaOH + NH•HO.