Dr. Stone Wiki
Dr. Stone Wiki

Baaad Chemicals (ヤベー (くすり) Yabē Kusuri) is the thirty-third chapter of the Dr. Stone manga.


The group return from the sulfur lake with several jars of sulfuric acid. With that, they have most of the basics they need to begin working on the sulfa drug for Ruri. They go through several steps to create hydrochloric acid, chlorosulfuric acid, and sodium hydroxide. Senku's comments on how dangerous each of the chemicals are concerns Kohaku, who asks if they plan to make her sister drink it. Senku assures her that it won't be toxic when she takes the final form. They then get ammonia from urine, which concerns Kohaku further.

The final ingredient they need is alcohol, and Kaseki mentions that they could probably get a ton of it if they win the Grand Bout tomorrow. They get excited by this prospect.

The next morning, Kokuyo checks that the preparations are all going accordingly, and Turquoise admits that there is one problem: Kohaku signed up, but even worse, Senku had joined as well. Since there's nothing in the rules against it, they can't refute them joining. Even Senku's friends are surprised he joined, but him and Ginro are trying to find as many ways to push the rules as possible, and even try getting Kinro in on it.

Senku steps foot in the village, and for the first time Ruri hears his name. She begins descending the stairs of the chief's hut, seemingly knowing his name somehow.

Characters in Order of Appearance[]

Chapter Notes[]

  • The group return from the sulfur spring with sulfuric acid.
  • Work begins on the sulfa drug.
  • The Grand Bout is tomorrow, and they plan to win it to get the alcohol they need.
  • Ruri recognizes Senku's name.


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Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
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Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
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Chapters 4647484950
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Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
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Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Episodes 35Ryusui3637383940
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
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The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
Episodes 555657
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
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Chapters 194195196197198199200
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Stone to Space Saga
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