The Splash Potion of Harming (Instant Damage) is a throwable variant of potions that inflicts immediate damage to nearby entities. When it shatters upon impact, it reduces health points of affected creatures and players, except for undead mobs like zombies and skeletons, which are instead healed by it. This potion is crafted using a Potion of Harming and gunpowder, and is often used strategically in combat situations to weaken opponents quickly.
The numerical item ID for Splash Potion of Harming (Instant Damage) is 438
Numerical item IDs will only work in Minecraft versions below 1.13.
The item ID for Splash Potion of Harming (Instant Damage) is minecraft:splash_potion
This is the spawn command to give yourself Splash Potion of Harming (Instant Damage) in Minecraft which includes the Minecraft /give command. If you are using the Essentials plugin you will need to use /minecraft:give instead of /give