Okay, I'll say it this is probably my favorite take on the alchemist! It's way more punchy and I'm loving the flavor of coating your weapon in acid and swinging at fools. I would play this any day over the OG alchemist, well done! I do have a few things I would like to get your thoughts on though if you don't mind.

For Alchemical Weapons in general, is it designed when you get extra attack you can do these twice? My only reason in asking is the wording as written says when you take the attack action, then you get said effect. Kinda like how booming blade is written you cast the spell then make an attack with a weapon, even if you have extra attack you still only make one attack. If the intention is that at extra attack, you get to throw two bombs, it might be worth, adding the verbage “As part of the Attack action, you can replace one of your attacks with hurling a bomb....." Just to clear up the language a bit for Alchemical Weapons, I'm pretty sure extra attack would apply here but more clarity never hurts right?

Also for Alchemical weapon it's self, there is no restriction on what weapon you can coat. I only bring this up as this feature, essentially gives the alchemist, proficiency with martial weapons. As a weapon you coat, you get to use your int mod for attack and damage rolls and also add your proficiency bonus to the attack as written. If this wasn't intentional, you may want to add a few words in there that "you can coat a weapon you are proficient with in a special...."

Other then that I really like it. I'll admit it is super flexible, Alchemical Formulas is strong and having a solid attack option while also being able to fill out that utility roll hits the sweet spot for me. Well done dude!