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Cleaning agar from flask Options
 
Rick Sanchez
#1 Posted : 8/8/2017 2:22:49 PM

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Does anyone have experience removing congealed agar from the inside of an Erlenmeyer flask? I've tried running a cycle through the dishwasher and soaking in alcohol and vinegar and there are still blobs of agar all around the upper part of the flask. I won't need to pour anymore agar for a while and need my flask clean so I can use it to mix basic solutions.

Rick Sanchez is a fictional character. Anything said by Rick Sanchez is not representative of any real life events whatsoever.All posts should be regarded as fictional occurrences in imaginary dimensions.

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GolgiFapparatus
#2 Posted : 8/8/2017 6:50:22 PM

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Try soaking in a hot water bath/steaming in a pot, spraying the inside with 99% IPA, and depending on the size of the flask, use some good ol' fashioned elbow grease and a brush to break off agar blobs. Here's a suggestion for brushes that I use often in the lab for cleaning pesky glassware https://www.southernlabw...ZnQFKEAQYAyABEgJ2VPD_BwE
 
Ulim
#3 Posted : 8/8/2017 10:06:56 PM

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Boiling hot water.

conc. Sulfuric acid and conc. H2O2 will remove anything organic from any labware you want.
 
downwardsfromzero
#4 Posted : 8/12/2017 6:48:53 PM

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Ulim wrote:
conc. Sulfuric acid and conc. H2O2 will remove anything organic from any labware you want.

That is dangerous advice. "Piranha acid" can react explosively with organic residues and is among the top causes for lost eyes, fingers or indeed lives in the chemistry lab.

This is not trivial.




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