Splash Potion

Splash Potions are future craftable throwable potion based weapons introduced in 1.9 Pre-release 4. You can turn any brewable potion into a Splash Potion by mixing in Gunpowder. It appears in a different shaped flask. Instead of drinking it, you throw it like a grenade. Splash potions can also be fired from a Dispenser.

Brewing
For ingredients that go into Potions, Splash Potions, and known Potion recipes see Brewing. According to Jeb there are 161 possible potion combinations in Beta 1.9 Pre-release 3, and there may be 2,653 potions in the full Beta 1.9 release.

Trivia

 * Effects from Splash Potions travel roughly five blocks in all directions from the source of impact.
 * A splash potion will affect the player who throws it if it impacts close enough. This can be dangerous if using harmful potions but can also be useful; a group of players clustered together could all receive the benefit from a positive potion, depending on distance, if the user throws it straight down at their own feet.
 * A Splash Potion's effect will decrease in time the further away a Mob is from the explosion.
 * An Instant Damage III Splash Potion is powerful enough to instantly kill its victim.
 * It would appear Zombies and Skeletons are unharmed by Instant Damage Splash Potions and Poison Splash Potions.
 * Spiders also seem to be immune to the poison from Poison Splash Potions.
 * As of 1.9 Pre-release 4, Splash Potions do minor explosive push damage and have an in-game damage effect, but they do not seem to harm Creepers or Skeletons in Creative Mode.