http://wow.allakhazam.com/db/item.html?witem=9061
As the yellow quoted caption says, engineers will need it. Especially Goblin Engineers.
Are you looking at this for an alchemy recipe?
If so, I suggest just buying it so you have it. Even if you don't make it that much/often, what you do make can be sold on the auction house for a reasonable price (as suggested by other prices it is set for).