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Author: Subject: Stabilizer for benzaldehyde
Lefaucheux10
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[*] posted on 2-3-2017 at 01:22
Stabilizer for benzaldehyde

Hi,


Can i use some BHT (dibutylhydroxytoluene ) to prevent the oxidation of benzaldehyde in the acid ?

How much should i use ?

thank
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CuReUS
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[*] posted on 2-3-2017 at 07:43


I don't think an anti-oxidant is needed for benzaldehyde as long as you keep it in an air tight container(If the container is not air tight to start with,it becomes one after a few days because the stopper will get jammed due to some of the benzaldehyde oxidising to benzoic acid;) )
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Lefaucheux10
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[*] posted on 2-3-2017 at 07:54


2 years ago i test a stock of benzaldehyde for peroxyde and it was positive !

surprising but these is the reality benzaldehyde can form peroxyde....

good bottle is an evidence for benzaldehyde and tape arround the cap too
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Lefaucheux10
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[*] posted on 2-3-2017 at 08:43


2 years ago i test a stock of benzaldehyde for peroxyde and it was positive !

surprising but these is the reality benzaldehyde can form peroxyde....

good bottle is an evidence for benzaldehyde and tape arround the cap too
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Dr.Bob
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[*] posted on 2-3-2017 at 19:08


But BHT may not have as good a redox potential as BHT, so I'm not sure that it would really protect benzaldehyde. The main oxidation product is benzoic acid, which will form readily upon exposure to air. I have never seen any commercial aldehyde with BHT present, so I doubt it is that useful. BHT is mostly used for ethers and some other air sensitive compounds that form peroxides, but none that I am aware of oxidize to acids.
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byko3y
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[*] posted on 2-3-2017 at 21:12


Almost any antioxidant will work.
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Yttrium2
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[*] posted on 3-3-2017 at 03:02


Is there something I might be missing
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Corrosive Joeseph
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[*] posted on 3-3-2017 at 04:32


'Hydroquinone is the most active anti-oxidant for benzaldehyde'................
https://books.google.de/books?id=bKIrDgAAQBAJ&pg=PA188&a...

'Thiourea is therefore somewhat over twelve times as effective as hydroquinone ' when used as an antioxidant on benzaldehyde............
https://www.google.com/patents/US2280311

Hmmm.................


/CJ



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