Salt is a seasoning that first appears in the episode "Krab Borg."
It is a white seasoning.
Role in series
As Mr. Krabs attempts to put salt on his hard-boiled egg, he gets it in his eyes, which turn them veiny, watery, and red. He then bursts out of his office screaming; while holding a metal device and having two batteries in his pocket, and having been heard saying "Bee-boo boo bop" in his office earlier, SpongeBob and Squidward come to the conclusion that Mr. Krabs is a robot.
SpongeBob, while in the "Free Money" box with Squidward, holds a plate of salt as one of the items for Mr. Krabs to pinch while doing the pinch test. Krabs then flips the plate over to SpongeBob's face, which causes him to shrink and dry up. He recovers by inhaling the water into his body.