- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
A caustic substance capable of burning through virtually anything, except for the special crystalline container used to store it. When a Vendorian shape-shifter tried to hide in Dr. McCoy's medical lab, disguised as a table, Captain Kirk threatened to flush the creature out by pouring orientine acid onto the tabletop the Vendorian was using as camouflage.