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Need help with preservative system
need product (shampoo) to be PEG, Propylene Glycol and Paraben free; finished product = 5.5 – 6
EU regulations say can only use 0.02 IDBC
Would an appropriate preservative system be:
1.0 Euxyl® PE 9010 (Phenoxyethanol, Ethylhexylglycerin)0.02 Glycacil L (Iodopropynyl Butylcarbamate)
0.2 EDTA
Can pentylene glycol be added or is it too similar chemically to propylene glycol.
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8 Replies
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What is your formula?
PE 9010 and EDTA may be enough.
No need for IPBC.
If you wanted to add another anti fungal, add sodium benzoate.
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0.3 Sodium Benz?
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Yes
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Shampoos are generally resistant to fungal contamination. But Abdullah is spot on - add benzoic acid as a booster vs bacteria - with surfactants its effective pKa is increased you’ll have an effect at that pH.
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What is the exact ratio of each component?
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If phenoxy 0.3-0.5 and 0.25 Benzoate - with EDTA 0.1 as the acid
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So we should use 0.15% tetrasodium EDTA to get 0.1% in acid form?
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Whatever the math says. but that’s just the way I tried to get consistency - prob doesn’t make too much diff.
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