Sodium nitroprusside
![](/Images/godic/202501/29/Sodium-nitroprusside-2D0218.png")
![](/Images/godic/202501/29/Sodium-nitroprusside-sample0218.jpg")
![Structure of sodium nitroprusside in the solid state, obtained by neutron diffraction](/Images/godic/202501/29/Sodium-nitroprusside-xtal-3D-balls-A0218.png")
![Sodium nitroprusside spectrum is used to calibrate Mössbauer spectrometers](/Images/godic/202501/29/Sodium_nitroprusside_Mössbauer_spectrum.svg0218.png")
Sodium nitroprusside is an inorganic compound with the formula Na2[Fe(CN)5NO], usually encountered as the dihydrate, Na2[Fe(CN)5NO]·2H2O. This red-colored sodium salt dissolves in water ethanol to give solutions containing the free complex dianion [Fe(CN)5NO].