Nitroprusic or Nitroprussic: How To spell?
The word Nitroprusic is misspelled against Nitroprussic, an adjective meaning "Pertaining to, derived from, or designating, a complex acid called nitroprussic acid, obtained indirectly by the action of nitric acid on potassium ferrocyanide (yellow prussiate), as a red crystalline unstable substance. It forms salts called nitroprussides, which give a rich purple color with alkaline subphides."
Nitroprussic has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings nitropru & ic which should not be misspelled with single 'S'
Wrong Spelling:  nitropru-s-ic  Correct Spelling:  nitropru-ss-ic 
Check more misspelled words of Nitroprussic to spell it correct.