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Nitric Acid (HNO3) is a highly corrosive mineral acid. Senku found it dripping from the ceiling of a cave that he woke up next to.[1]

It is created primarily by bat guano.[2]

Usage

It is one of the main ingredients in the depetrification formula.[2]

References

  1. Dr. Stone Manga: Chapter 2, Page 8
  2. 2.0 2.1 Dr. Stone Manga: Chapter 2, Page 11

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