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.
... and inventor of the Periodic table
May 19 - Auguste Molinier, French historian
July 14 - Anton Chekhov, Russian playwright and short story writer
July 22 - ...