I just tried this and it worked - even with 3% peroxide
https://www.youtube.com/watch?v=-LbMkp5DWHA
potassium permanganate stain removal
- Lyn
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- Job Title: Lab Assistant (Technician)
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Re: potassium permanganate stain removal
It's magic. Just tried it out on my dropper bottles. Pour in, swirl and pour back into the beaker for the next bottle. Then rinse and leave on drying rack. Thank you for the information.
Re: potassium permanganate stain removal
Worked!! that was too easy. thanks for sharing.
- c.labs4ever
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Re: potassium permanganate stain removal
Also Oxalic acid works well.
Re: potassium permanganate stain removal
Hi Everyone,
dilute Solution (concentration does not matter - approx. 0.1 M will be sufficient)
of Iron (II) ammonium sulfate will help to remove any stain of KMnO4.
I have been using it for long time without any problem to clean the burettes stained with KMnO4 after titration.
The used solution can be stored back and used again next time for cleaning...
I hope it assists..
Nehal Trivedi
dilute Solution (concentration does not matter - approx. 0.1 M will be sufficient)
of Iron (II) ammonium sulfate will help to remove any stain of KMnO4.
I have been using it for long time without any problem to clean the burettes stained with KMnO4 after titration.
The used solution can be stored back and used again next time for cleaning...
I hope it assists..
Nehal Trivedi
Re: potassium permanganate stain removal
Just buy SO2 Sterilizer in Woolies home brew section. It is Sodium Metabisulphite and can not be beaten for this application.
Re: potassium permanganate stain removal
Even safer and just as effective - a vitamin c tablet or powder dissolved in a small amount of water and poured on to the stain will do the job with no stress ,toxic solutions or SO2 to breathe. (ascorbic acid is an excellent reducing agent).
.
.