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Chart for exponential increase in efficiency of organic acids with lower pH.
The other day…I was somewhere on ULP, and saw a chart that showed the exponential increase in efficacy of organic acids as preservatives as pH was lowered. Now I am kicking myself for not taking a screen shot.
I work with a lot of beginners…and I need to have that slide in my arsenal. So many times the mfg’s are including a range that is going way up to almost neutral, all the while knowing the product will just barely function in that range.
If someone remembers or has that slide…I would love the link.
It was very easy to read, understand…and make your jaw hit the floor.
Aloha.
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7 Replies
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I have set my Windows calculator to ‘scientific’… comes with the ‘log’ function (though estimating based on pka vs. pH works good enough for me). *Cough-cough*
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Pharma said:I have set my Windows calculator to ‘scientific’… comes with the ‘log’ function (though estimating based on pka vs. pH works good enough for me). *Cough-cough*I need something….for someone with a little less knowledge.
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Total side bar:
Came across this…. Efficacy of Several Organic Acids Against Molds - ScienceDirect
Not what I was looking for…but begged me to ask….it looks like preservatives are not using the most efficient organic acid. Is this because the good ones….aren’t skin tolerant….or GRAS?
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Yup, that’s it.
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i couldn’t find anything comparing different acids but some suppliers have charts like you’re describing for their individual preservatives
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and this is for caprylhydroxamic acid
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