Sodium was a substance that comprised certain starship fuels during the Galactic Civil War. Sodium was present on Jakku in the Graveyard of Ships as a hazard to scavengers on the planet's surface. It possessed a yellow color in the sand, identifying it and warning those of its presence.
- Sabine My Rebel Sketchbook (First mentioned)
- Leia, Princess of Alderaan (Mentioned only)
- Rey's Survival Guide
- Star Wars: The Last Jedi: Expanded Edition