Strontium

Strontium was a red-colored solid substance. It was poisonous, being potentially lethal to inhale. Strontium could be used as fuel for vehicles or explosives, with the use of the substance in the latter leading to red-hued explosions.

In 5 BBY, Sabine Wren, a member of the anti–Galactic Empire rebel crew of the starship Ghost, noted in her journal strontium as a possible fuel for creating red explosions. After the Galactic Civil War battle on the planet Jakku ten years later, the planet's surface became littered with the wreckage of starships and vehicles, leading to dangerous fuels such as strontium leaking in its sand. At some point prior to her departure from Jakku in 34 ABY, the human scavenger Rey mentioned strontium in the survival guide she was writing. She included in it a note with a visual depiction of a sample of the substance and wrote that strontium colored sand red, a fact that could inform scavengers to proceed with caution.

Text and facts from the “Strontium” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.