December 04, 2020, 03:57:58 PM
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Topic: Potassium Ferrocyanide ANHYDROUS?  (Read 100 times)

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Offline DavidSolomon

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Potassium Ferrocyanide ANHYDROUS?
« on: November 09, 2020, 11:01:29 AM »
Hey Everyone, My English may be weak so Excuse me, i'm Having a Problem with the Word Anhydrous , i'm looking everywhere for Potassium Ferrocyanide Anhydrous , instead i get Results about "Trihydrate", K4Fe(CN)6 is always Associated with 3H2O, i Searched on Amazon, Ebay, other forums, you name it, and i never find Potassium Ferrocyanide Anhydrous and it's Always "Trihydrate", The White Powder and not the Crystals, Am i searching wrong? is there another name for "Potassium Ferrocyanide Anhydrous" Perhaps? (Not Ferricyanide, but Ferrocyanide) Thanks in advance!

Offline AWK

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Re: Potassium Ferrocyanide ANHYDROUS?
« Reply #1 on: November 09, 2020, 11:35:39 AM »
If you do not know exactly what chemical compound you mean, write its summary formula.

As for the dehydration of commercial trihydrate, it can be done relatively easily, although a little patience will come in handy.
The compound can be dried at 180°C in vacuo, or it can be crystallized from an aqueous solution at over ~ 87°C under nitrogen and dried in vacuo until constant weight. It is very difficult to keep it perfectly anhydrous, and perfect anhydrous compound is possibly needed for some physical measurements only.
AWK

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