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Do preservatives go bad?
I have some liquid germall plus and some Germaban II that I have had for over a year. I make home products so I don’t use them as quick as someone makeing for production. The preservatives don’t smell bad or anything, but I was wondering if they would stop preserving my products at a point. or if i should toss them since I had them so long. or maybe should i just double the amount in my poduct and it be fine?
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3 Replies
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Generally its the loss of actives in certain cases, you will have to do microbial testing to check the efficacy of those. Maybe you will need to add more to preserve the formulation, recently I had the same dilemma with Phenoxyethanol and I was told to check the active. Either I could increase it in the final formula or send it back to supplier who would then top up the lost active content.
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They won’t smell bad unless they are severely contaminated, but preservatives will degrade over time. So yes, they will stop preserving. The degradation will deppend on may factors, like storage, manipulation, RT, etc., so it’s hard to say that it will be safe if you double it, you can only rely on a lab test. And unless you have large quantities it’s cheaper just to buy more and avoid any trouble.
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Mainly, formaldehyde releasers degrade
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