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j_sum1
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Posts: 5641
Registered: 4-10-2014
Location: Oz
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Mood: d jolly / dt > 0
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Sparkling Test Tubes
I use a lot of these one way or another. And it is annoying when I grab a handful and they look kind of smeary.
Lie them flat in a container. (I used an ice cream container.) Sprinkle liberally with sodium percarbonate. Pour a jug of boiling water over the top.
When the fizzing stops, extract and enjoy.
Probably an old trick given that percarbonate is used to sanitise beer bottles. Probably extends to other glassware as well.
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Herr Haber
International Hazard
Posts: 1015
Registered: 29-1-2016
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"Other equipment"
Whenever I finish an ammonia bottle I drop my comb inside with a little bit of water.
Swirling it around for 30 seconds gives better resulsts than a pressure washer.
The spirit of adventure was upon me. Having nitric acid and copper, I had only to learn what the words 'act upon' meant. - Ira Remsen
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j_sum1
Administrator
Posts: 5641
Registered: 4-10-2014
Location: Oz
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Mood: d jolly / dt > 0
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Barium sulfate residue
Barium sulfate
BaSO4 is notoriously insoluble. I like to recycle Ba salts when I can and then render the rest inert before disposing. This invariably results in a
fine layer of the sulfate clinging to the glassware. Especially annoying on filtration equipment and it looks really unsightly.
Rinsing with hardware store grade hydrochloric acid with a wee bit of mechanical action seems to work well. It might take a couple of rinsings with
the acid. A surprising amount reappeared when running water over apparently clean flasks.
I also managed to hydrolyse the nylon bristles on my new flask brush, so watch out for that one.
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MaeBorowski
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Posts: 9
Registered: 8-3-2021
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I found that boiling sulfuric acid destroys any crap including elemental carbon, sulfur, barium sulfate, and most polymers. Unfortunately for mad
science, I haven't unnecessary diamond. This method is gentle for glass, cheap, fast, reusable, eco-friendly etc. so you can try it if the piranha
sucked a little.
Remember about SO2 releasing!
The chemists are a strange class of mortals, impelled by an almost insane impulse to seek their pleasures amid smoke and vapour, soot and flame,
poisons and poverty; yet among all these evils I seem to live so sweetly that may I die if I were to change places with the Persian king. -- Johann
Joachim Becher
please make comments to my English in private messages or in the topic
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Crazy_Chemist
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Posts: 19
Registered: 22-7-2019
Location: Europe
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Mood: Radioactive
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I bought som chromium (tri)oxide to have to clean my glass, but I'v understand theat is really dangerous and carcinogenic?
Amateur chemist, just for fun!
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CycloRook
Hazard to Self
Posts: 89
Registered: 2-4-2018
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What is a good cleaner/solvent for glassware. I've been do alot of grignard reactions recently and have had a few run away from me.
Acetone and acetic acid worked pretty well but both smell really bad.
Is there something I could soak my glassware in overnight that would clean/destroyed/dissolve everything.
Water based would be best that doesn't smell.
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