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Stability test on Shampoo
Hi,
I’m planning to do a stability testing on my shampoo. As bathroom usually is very humid, what type of stability test would you recommend? Is it the same test as testing a lotion? e.g. put in an oven for 3 months at 45degree?
Please advise. Thanks! -
5 Replies
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You can find more information here. https://chemistscorner.com/how-to-stability-test-a-cosmetic-formula/
We’re actually holding a free stability testing webinar next week. You can sign up here. https://chemistscorner.com/webinars/how-to-stability-test-a-cosmetic/
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@Perry Thanks, Perry! I will try to join the webinar but i have some time differences here in Asia.
May i know if conducting a test on shampoo would be the same as conducting it on a lotion/cream (i.e. oven testing?) Thanks! -
There will be a replay so you can sign up and watch it at a later time.
Yes, the test conditions for a shampoo would be the same as for a lotion. The viscosity & pH measurements may be different depending on the specific formulas.
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Unless that’s a shampoo bar that’s left open in a humid bathroom,
shampoo is sold in bottles, so they’d reach equilibrium with the water vapour that tries to evaporate, but can’t because the bottle is closed (although not perfectly sealed)So a closed bottle stability test replicates real-life humidity conditions.
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Thank you, Perry and Gunther 🙂 Much appreciated!
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