February 21, 2024, 12:57:05 PM
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Topic: Overheating magnesium sulfate when drying it  (Read 543 times)

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Offline kemia_magyar

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Overheating magnesium sulfate when drying it
« on: October 10, 2023, 08:52:23 AM »
I was drying a bunch of MgSO4 in the oven. It was in the later stage of the drying process where you crank up the heat to 300°C and let it sit there for some time that I got distracted and let it go all the way to 340°C for like 30 minutes.
Most of the MgSO4 turned into a dark brown powder with some original white sulfate still present (10%-15%).

What has it actually turned into?

Offline Hunter2

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Re: Overheating magnesium sulfate when drying it
« Reply #1 on: October 10, 2023, 11:08:28 AM »
MgSO4 is white. The drying process should not have any impact of the colour. I thing it was impure or some dirt comes from the oven.

Offline kemia_magyar

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Re: Overheating magnesium sulfate when drying it
« Reply #2 on: October 11, 2023, 02:35:01 AM »
Wow, so all the crap and old grease in the oven that started burning at 340°C got absorbed by the sulfate and ruined it? Interesting.

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