I found in the Goblin Camp 6 Barrels of Smokepowder and 7 Barrels of Firewine.
From lore about the Forgotten Realms "Following the destruction of Lantan during the Spellplague, many artificers considered the secrets behind smokepowder to have been lost.[5]" Looks like our goblins are brighter then we thought.
There is a reason for it
you can talk to the Zhentarim vendor in the camp that tells you they sold the powder to goblins.
