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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: vikl on August 22, 2022, 10:11:29 PM

Title: What causes Acetone to change color
Post by: vikl on August 22, 2022, 10:11:29 PM

Hi,

What would cause Acetone purity 99.9% to change color from clear to yellow. The Acetone is stored in metal drums and stored indoors.

Thanks

Title: Re: What causes Acetone to change color
Post by: Hunter2 on August 23, 2022, 02:01:14 AM

Some contamination.
acetone dont change colour normaly.

Title: Re: What causes Acetone to change color
Post by: vikl on August 23, 2022, 07:23:58 PM

Thanks Hunter2, can Acetone be stored in HDPE IBC ?

Title: Re: What causes Acetone to change color
Post by: Hunter2 on August 24, 2022, 12:19:53 AM

For security reason , no. Danger of static electricity and Explosion possibility It stored in stainless steel drums or smaller amount also in Glas bottles.

Title: Re: What causes Acetone to change color
Post by: DrCMS on August 24, 2022, 05:07:56 AM

Quote from: vikl on August 23, 2022, 07:23:58 PM

Acetone be stored in HDPE IBC ?

Acetone (UN no. 1090) can be transported in UN approved EX IBCs that meet the requirement of provision IBC02.  It can be stored in the same kind of IBC (not just any IBC that is unsuitable for flammable liquids) as long as precautions are taken to minimise direct sunlight and potential ignition sources.

It is better practice not to store acetone in IBCs.

Title: Re: What causes Acetone to change color
Post by: vikl on August 25, 2022, 07:43:46 PM

Much appreciated thank you for the support.

Title: Re: What causes Acetone to change color
Post by: cosmonaut on September 25, 2022, 07:32:44 PM

Interesting....I was once asked this question once upon a time... I believe in their case it was some sort of aldol condensation that was causing a yellowing effect.  With that said, I find that path length can also influence the perceived color change specifically when it comes to IBC container volumes.  I remember my mentor once saying a single molecule can cause a shift in color.  I took it as gospel but ehh who knows. Good luck!