Hydrochloric Acid (Below Zero)

Hydrochloric Acid is a material crafted using a Fabricator. It is a necessary component to make Polyaniline, which is essential for upgrade modules. In real life, Hydrocloric Acid is extremely dangerous, though it poses no harm to sea life or the player in Subnautica.

Recipe
The blueprint for this item is acquired by picking up a Young Cotton Lilly.