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.
- Star Wars Rebels: Sabine My Rebel Sketchbook (First mentioned)
- Star Wars: Rey's Survival Guide
- Star Wars: Complete Locations