Preservation system in a moisturising face cream

LuisJavierLuisJavier Member
in Formulating
If desiring you avoid the use of potassium sorbate and sodium benzoate due to their very low pH requirements for satisfactory preservation efficacy, formaldehyde releasers and benzyl alcohol, can they be replaced by any of the following? I aim to pair phenoxyethanol with one or more other preservatives.

Hydroxyacetophenone, phenylethanol, sorbitan caprylate, glyceryl caprylate, caprylyl glycol, glyceryl laurate, dimethyl phenylbutanol, o-cymen-5-ol, 2-benzylheptanol, decylene glycol, tetrahydroxypropyl ethylenediamine, tropolone. 

Any other other suggestions are welcome 

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Comments

  • MarkBroussardMarkBroussard Member, Professional Chemist
    Why not just use Euxyl PE 9010:  Phenoxyethanol (and) Ethylhexylglycerin
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    See website for details www.desertinbloomcosmeticslab.com
  • LuisJavierLuisJavier Member
    @MarkBroussard mainly because I can buy phenoxyethanol separately and it is significantly cheaper than my supplier offering it with EHG. I don’t know if I could find EHG separately and I don’t know if EHG+phenoxyethanol gives broad spectrum preservation or if I could replace EHG for something much cheaper. 
  • LuisJavierLuisJavier Member
    I’m looking at alternatives because I aim to possibly use Ultrez 30 and I wish to use a moderate pH of 6 as well as not wanting to compromise benzoic acid and it’s ester or sorbic acid and ester’s low pH efficacy requirement. Alternatively, I’m aware that I could use dispatch phosphate for thickening but at a much higher inclusion rate. Big difference in price? I don’t know. Sensorial upgrade? I don’t know again.
    I’m not keen on benzyl alcohol but I could be convinced on using it; my only issues with it skin sensitivity and whether it is safe to use around the eye area; I read that it can cause corneal necrosis. Also, it can end up turning into benzaldehyde which may also sensitise skin and reduce preservation efficacy. 
  • LincsChemistLincsChemist Member
    Your best bet is to speak to a company that specialises in preservatives - either Schuelke or Thor would be a good start. They'll be able to recommend something that fits your needs. 
  • MarkBroussardMarkBroussard Member, Professional Chemist
    Phenoxyethanol + Caprylyl Glycol is another widely available commercial blend.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    See website for details www.desertinbloomcosmeticslab.com
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