This is a percent sign. Since you don't have a pressing need to, say, label a carton of milk, you can't think of anything useful to do with it right now.
(In-game plural: percent signs)
Item number: 4554
Description ID: 981502191
View in-game: view
- May either be some royal jelly or a mind flayer corpse.
"4554" does not have an RSS file (yet?) for the collection database.