We use this acid bath to clean electrochem glassware. A recently prepared one has turned faint yellow after 3 or 4 uses. We've been trying to rule out possible sources of contamination. Could KCl contamination be the cause?
António Maximiano Fernandes
Not. This solution is stable for long time
If there some contamination you can see at bottom
As oxygen react with solution become darker
Beware, use mask when open it
Regards
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Hamid Reza Moazami
I think this is caused by adsorption of organic mater on the glass walls and subsequent oxidation to colored species upon contact with the cleaning mixture.
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Dharmendra Neupane
I think Piranha solution is suitable to clean the glassware instead of the acid bath.
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