Unpreserved Hydrosol

lovelove Member
edited July 2014 in Formulating
Hi, I'm having a hard time sourcing out Organic Rose Hydrosol that is preserved for my formulations. I have heard that using an unpreserved one is risky. However I have found a nice organic Hydrosol that is unpreserved from a good source. Should I add leucidal preservative to it as soon as I open it? Do I need to preserve it at all? I do add it to my heated water phase of my formulations. Any take on this?


  • vjayvjay Member
    Can you explain it more that what is your final formulation, what is the pH of your final product.
  • PerryPerry Administrator, Professional Chemist
    Yes you need to preserve it.  If your supplier hasn't preserved it then it is most likely contaminated.
  • Perry's right.  If a raw material is unpreserved and not well known by formulators/suppliers be inherently resistant to microbial contamination, then it's probably contaminated or at least risky.  Certainly if it contains water and has a pH between about 5 and 10, then it should be preserved.
    For testing help visit us at Cosmetic Test Labs
  • lovelove Member
    Thank you all for your take on this. I just don't understand then why are these hydrosols sold unpreserved at the risk of contaminating our products?
  • MicroformulationMicroformulation Member, Professional Chemist
    These Hydrosols are sometimes sold without preservation to pander to the uber natural chemophobia. I see it with Crafters a lot. However they hopefully grow and realize preservatives are needed, especially in a product with such a high Aw.
    markfuller@microformulation.com Microformulation.com Microformulation Cosmetic Consulting provides Custom Formulations for both large Commercial accounts as well as smaller entrepreneurs. We can provide Naturally compliant Formulations under the NSF, NPA, Whole Foods and USDA Organic Certifications. BS.Pharm Albany College of Pharmacy, Union University.
  • I do produce hydrosols and i do filtrate them. Till now i didnt preserv them, only stored in dark cold place. Must say, i had it over 1 year and wasnt any sign of contamination (not in appearance and not in odor). This year i will preserv it, i destill it 2 weeks ago and i need now to filtrate 1000l of lavender hydrosol.
  • Just so the gang that frequents this forum knows, it only takes one microorganism to completely contaminate and ruin an unpreserved, previously sterile cosmetic product or raw material, if that substance supports microbial growth.  Keeping something sterile requires good knowledge of microbiology/aseptic technique and a sterile work environment of some sort such as a laminar flow hood or biological safety cabinet.  In other words, it's not practical for most non-pharma companies!
    For testing help visit us at Cosmetic Test Labs
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