Will the properties of sodium sulfate change over time by being in the oven continuously?

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Mark Hiemenz

That depends on the initial form and the temperature of the oven. Na2SO4 is somewhat hygroscopic, so if your crystals were already hydrated and your oven is set to above 100 C then you'll end up drying them over time changing your MW. If they weren't though I don't see an issue. They can't "degrade" per se.

Moisture is a bigger problem.

Mahmoud Meskar

Thank you dear Mark! useful!

Paul Milham

Provided the temperature is not above the decomposition temperature and you don't add anything to it, it is very chemically stable

Thank you dear Paul!