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pH changes after 3 months of stability
Hello everyone,
I have a formulation of an alkaline APC spray which had the original pH as 10,41 and by the end of 3rd month stability at RT, 40C and 4C, the pH went down to 9,8. Is this a big drop in pH? Should I be worry about this? There is no sign of precipitation, however, the scent of Bergamout has slightly reduced at 40C. Other than this, I cannot see other big signs. I would love to hear your feedback.
Thank you.
Regards
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