Source Core Rulebook pg. 637 4.0
When you use a thrown weapon with the splash trait, you don’t add your Strength modifier to the damage roll. If an attack with a splash weapon fails, succeeds, or critically succeeds, all creatures within 5 feet of the target (including the target) take the listed splash damage. On a failure (but not a critical failure), the target of the attack still takes the splash damage. Add splash damage together with the initial damage against the target before applying the target’s weaknesses or resistances. You don’t multiply splash damage on a critical hit.


Acid Flask, Aether Marble, Alchemist's Fire, Blight Bomb, Blightburn Bomb, Blood Bomb, Bottled Lightning, Bottled Sunlight, Boulder Seed, Crystal Shards, Dread Ampoule, Dwarven Daisy, Elemental Ammunition, Freeze Ammunition, Frost Vial, Fu Water, Ghost Charge, Goo Grenade, Holy Water, Junk Bomb, Lodestone Bomb, Meteor Shot, Mud Bomb, Necrotic Bomb, Overloaded Brain Grenade, Pernicious Spore Bomb, Peshspine Grenade, Pressure Bomb, Redpitch Bomb, Shatterstone, Skunk Bomb, Spellsap Grenade, Star Grenade, Sulfur Bomb, Tallow Bomb, Thunderstone, Trueshape Bomb, Twigjack Sack, Unholy Water, Vexing Vapor, Water Bomb