Topic: aldehydes with sodium hydrogensulfite? (Read 4567 times)

cofi · « **on:** April 04, 2006, 08:58:48 AM »

does anyone have a recipe?

I googled it, but didn't find anything useful

TIA,
F

AWK · « **Reply #1 on:** April 04, 2006, 10:10:37 AM »

Just mixing with small excess of NaHSO3 solution

Alberto_Kravina · « **Reply #2 on:** April 04, 2006, 12:15:56 PM »

It has to be a fresh prepared saturated Sodium hydrogen sulfite solution

AWK · « **Reply #3 on:** April 05, 2006, 01:13:20 AM »

This solution is prepared by mixing enough Na2S2O5 (sodium pyrosulfite - NaHSO3 is unstable) with water.
Na2S2O5 + H2O = 2NaHSO3

pantone159 · « **Reply #4 on:** April 05, 2006, 02:10:00 AM »

This solution is prepared by mixing enough Na2S2O5 (sodium pyrosulfite - NaHSO3 is unstable) with water.

I think 'pyrosulfite' is also called 'metabisulfite'.