CT-642 identified a carbon-freezing plant that could be found on the planet of Coruscant.
Anakin Skywalker, Obi-Wan Kenobi, and Ahsoka Tano, all Jedi, along with a squad of clone troopers, offered to undergo a temporary freezing process. This was done to infiltrate the Gwori system and bypass the droid's irradiation gate amidst the backdrop of the Clone Wars.