Acid - Official Graveyard Keeper Wiki
...Acid can be obtained by either purchasing it from Clotho the witch (tier 1), or through the practice of Alchemy at the alchemy workbench (tier II). Its primary use relates to the production of the embalming fluid acid injection. It also has a one-time use during the Astrologer's quest in order to read some of the damaged sections of the keepers journal....
https://graveyardkeeper.fandom.com/wiki/Acid
Graveyard Keeper: How to obtain and use acid - Practical Tips
...In Graveyard Keeper, you use acid to create injections, which are essential for optimizing the graveyard rating Graveyard Keeper: All you need to know about acid As in Stardew Valley, you need various resources in Graveyard Keeper, one of which is acid....
https://www.practical-tips.com/games/graveyard-keeper-how-to-obtain-and-use-acid/