AK20I means 80% nitric acid + 20% N2O4 + Iodine passivant
AK = Azotna Kislota = Nitric Acid in
NASA
Similar to AK20I
(S) - Safe
Task Classification
0G - Zero Gravity
2GRLV - 2nd Generation Return to Launch Vehicle
2IC - Second In Command
2M - Micro Miniature
2MASS - Two Micron All-Sky Survey
2STO - Two Stage To Orbit
View all in NASA