Iron Solute
Appears In:"The Maze of Bones" Card Pack

To unlock this clue, you need to add the 6 cards from The Maze of Bones.


Amy and Dan Cahill discovered that the piece of paper Grace gave them has the Clue after all. RESOLUTION was the answer to the missing word. Dan solved the anagram, discovering the clue IRON SOLUTE.


The Cutscene shows exactly the same paper that was given to Dan and Amy.The letters in the RESOLUTION go out and go in another place and forms the word Iron Solute.

Key Edit

The key on the cards that form the card combo for this Clue contains a bone.

Card ComboEdit

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About Iron SoluteEdit

Iron solute is used for many things. It can be used for metalworking and chemistry.

The formula for iron solute is Aluminum Alloy Solution (AAs).


  • In the book, Amy says it is an ingredient for ink.
  • "Solute" means "dissolved in water" so "Iron solute" can be written Fe (aq).
  • Grace Cahill wrote RESOLUTION as an anagram to it.
File:Iron Ore.jpg
File:The 39 Clues Clue 18
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