Gunpowder

Gunpowder is a miscellaneous item in Fallout 76.

Characteristics
An explosive chemical mixture of sulfur, charcoal and potassium nitrate. It is a required component of several ammunition types that can be crafted at a tinker's workbench. It cannot be obtained from scrapping but it is also not dropped upon the player character death.

Crafting
Making gunpowder is a net weight increase by almost double. This only gets worse with the Pack Rat perk, because gunpowder is not affected by it. It's better to use up the gunpowder the player character has, and only make more when they're making ammo immediately.
 * 3 * 0.05(acid) + 5 * 0.05(cloth) = 0.4 total materials
 * 15 * 0.05(gunpowder) = 0.75 final gunpowder weight

Locations
All most all Supermutant has it on their body when you kill them. Top of the World dead raider body on the observatory has equal chance of spawning frag grenade or gunpowder.