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.

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