RFNA is a rocket fuel (a storeable oxidiser): red fuming nitric acid. HNO3 + 13% N2O4 and 3% H20. The colour of the resulting red fuming nitric acid is imparted by N204.
... Related to urethritis is so called urethral syndrome[?]
Passage of kidney stones through the urethra can be painful and subsequently it can lead to urethral ...