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K87l Posted 11 years ago
Medical & Dental Studies

iron (III)-hydroxide oxide x H2O (E172)

What is the meaning of "iron (III)-hydroxide oxide x H2O (E172)"? It's from the composition of a tablet.

I know the meaning of E172 and iron (III) hyoxide and iron (III) oxide,
but I am not sure what this "iron (III)-hydroxide oxide x H2O (E172)" means. What's the meaning of "x"?
  

Top answer

Its really a chemistry question but its the number of water molecules of crystallisation. " but I think this means 1 molecule water bound into the salt molecule per group of 1 Fe3+ and 3 OH- ions. I'd assume E172 is standard is that salt prepared according to with limits on impurities.

— Cloa513

  • Its really a chemistry question but its the number of water molecules of crystallisation.
  • " but I think this means 1 molecule water bound into the salt molecule per group of 1 Fe3+ and 3 OH- ions.
  • I'd assume E172 is standard is that salt prepared according to with limits on impurities.
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2 Answers
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Its really a chemistry question but its the number of water molecules of crystallisation. Its usual represented as "." but I think this means 1 molecule water bound into the salt molecule per group of 1 Fe3+ and 3 OH- ions. I'd assume E172 is standard is that salt prepared according to with limits on impurities.
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Hi cloa513,

Thank you very much! I didn't expect to get an answer after a while. I am sorry that I questioned about chemistry. I couldn't find out what "x" means here and thought this might be a peculiar expression in English.

Anyway, thank you again!
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