Im trying to clean my boiling flask. There is a thin red film from my waste material boiling onto the sides. I have tried alcohol, acetone, papertowels on scrubbing brushes, soap and water, and now I am trying citric acid which doesnt seem to be helping. What should I do to remove these stains from my glass?
stupid question but i have to ask
are you sure that those stains aren’t inside your heating mantle?
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just replying so I can track this thread because I am also curious 
Base bath. Be careful though.
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It’s not exactly the same, but when I couldn’t get the stains off my wiper evaporator, I used to soak it in limonene.
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acetone works well
Acetone has been tried
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this one has come up a couple or ten times…and there are some great solutions (including piranha) offered.
If you haven’t explored them all, I highly (
) recommend doing so.
- Best way to clean ya nasty boiling flask??
- Boiling flask washing
- Cleaning Glassware
- Hello! / Cleaning Oversized Glassware
- Scrub-a-dub-dub da SPD
Don’t try this one at home…
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that’s the one I was looking for.
I remember it from another thread but could not remember the name for the life of me.
thank you!
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No worries at all my friend 
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Soak it in a base bath (8M NaOH) or acid bath (70% nitric acid) in a fumehood. Leave it overnight. Rinse with several volumes of water. Then try your organic solvents again.
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Do you have access to a sonicator? Usually helps with stubborn grime on our parts.
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Alconox. Alcojet is the low foam version for use in dishwashers.
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I use a bunch of quartz or stainless beads to help when I’m scrubbing a nasty residue off.
https://www.amazon.com/QCQIANG-Precision-Assortment-Bicycles-Refrigerators/dp/B09DJY8FL8/
Yeah, I was thinking another alconox product, Keylajet. I’ve used keylajet before but it’s very basic
That sounds like a direct ketamine delivery system
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