Does the damages dealt by the alchemists concoctions adds any modifier?Nope, not unless it specifically says so
— Mike Mearls (@mikemearls) September 1, 2017
Talking about alchemist’s concoctions, the damage required for objects and equipment destruction, is up to the DM? Or there’s any chart? There's a section in the Dungeon Master's Guide on breaking objects. #DnD
— Jeremy Crawford (@JeremyECrawford) September 1, 2017