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Stabilizing benzoyl peroxide? Increasing viscosity? Antioxidants?
Have a formula I’d like to extend the shelf-life of to make it more viable, in other words extend the time it takes for its BP content to degrade 10% below the label value of 3%. Ideally you want this to be beyond 12 months.
The base formula has 10% alcohol, 5% DMI, Curoxyl and a gellant. It holds together well, but shelf-life could be better.
Just making it thicker? Any other ideas?
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6 Replies
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Chelates can help (depending on purity of your ingredients).
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I agree with @Pharma. You can also try increasing pH of your product, add an antioxidant and -as you mentioned-, increase viscosity of your product.
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Thanks! Any specific chelates that could work here? Optimal pH?
Think it needs a multi prong strategy.
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I would use phytate because it’s the one which comes to my mind with the best oxidative stability. Maybe there are other untypical products which might increase BP stability?@ketchito‘s advice to use an antioxidant in an oxidant formulation… maybe not the best idea…
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@Pharma In the past, I’ve worked on a stain remover based on hydrogen peroxide. To stabilized (because the product became unstable over time, making bottles to swell), we used a close relative of BHT and it worked. I believe it worked preventing (or scavenging) free radicals. Might this be applied in the case of this BP product?
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@ketchito I stay correted. I completely ignored BHT and related radical scavengers but was mentally locked in ‘traditional’ antioxidants. Because BHT is a sterically hindered ‘monophenol’, it is quite oxidation stable though I assumed even those phenolics couldn’t take such an oxidative environmentand. But yes, capturing radicals should indirectly render peroxides more stable. I just couldn’t come up with anything stable enough…
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