Spray vs aerosol & germall plus liquid


Germall plus liquid= INCI: Propylene Glycol (and) Diazolidinyl Urea (and) Iodopropynyl Butylcarbamate. 

Manufacturer WARNING: Not to be used in aerosols.

Then read on the Supplier website that this preservative isn’t safe to be used in SPRAY bottles either??

Can a cosmetic scientist elaborate on the difference of spray vs aerosol & explain why a manufacture wouldn’t add “spray” in the warning to be completely clear? Are spray & aerosol not different??

My general un-scientific understanding is that an aerosol is a mist produced from pressurized gases (fluorocarbons? Always heard -bad for environment?). Whereas a pump spray isn’t relying on pressurized gasses? 

Is this warning about the product potentially being inhaled via the spray particles?  Isn’t anything that can be SMELLED, being breathed in on a molecular level? So many questions come to mind. Trying to reel it in.. I’m not a scientist but admire y’all!! 


  • DoreenDoreen Member
    edited February 2019
    Where are you based? The aerosol warning is for the IPBC in the Liquid Germall Plus and only counts for Japan and the US. Europe has other rules regarding IPBC, but I don't read anything about aerosols or sprays, only a lower allowed concentration for deodorants/APs:

    "Regulatory profile IPBC:

    USA: Approved in all applications with the exception of aerosols.

    Europe: For rinse-off products, a maximum of 0,02% is allowed. For leave-on products a maximum of 0,01% is allowed, except in deodorants/antiperspirants where the maximum is 0,0075%. Not allowed for use in body lotions and body creams. Not allowed for use in oral hygiene and lip care products. Not to be used in children < 3 years except in bath products/shower gels and shampoos. If used in products other than bath products, shower gels or shampoos, the following warning is required on the package: Not to be used for children under three years of age.

    Japan: IPBC is approved at 0,02% in all cosmetics. Not to be used in aerosol products.

    Maximum recommended use level of 0,5% Liquid Germall Plus in a finished formulation results in 0,002% IPBC concentration."

    I think that the reason behind the spray warning (whether an aerosol or not) is indeed inhalation or ingestion of IPBC, this way you'll be exposed to a relatively higher concentration than only topically, on the skin (note the lip care/oral hygiene warning for Europe).
    But as you can see, even the maximum recommended use level of 0,5% Liquid Germall Plus results in a very low dose of IPBC, even way lower than the 0,0075% deodorant max for Europe.
  • LawLaw Member
    edited February 2019
    I'm in the US, Doreen. Thank you Kindly for compiling this detailed information!! I'll save the data in my ingredient notes for future reference about this product. 

    I do see what you are saying about extremely low exposure via potential IPBC inhalation = ingesting (higher exposure) VS skin barrier contact (rinse off=less exposure than leave on)..  totally makes sense! I see your point about the even smaller % of IPBC of the .5% !

    from trial & error and reading here, I've learned that natural preservatives and antioxidants won't cut it for these specific uses: 

    Finally accepted I do need a (non-toxic.. but does this one release formaldehyde?  a plus is the wide ph range) preservative system to give shelf-life to a (mag sulfate) sea salt texture spray (for hair) and also a hyaluronic acid (for face) serum... so both would have different degrees of leave-on skin contact... but only the spray would be air-borne for a brief time

    today I found this usage/correction from another well-known supplier, should have eased my mind .. I just wish the Manufacturer would clarify if it's ok to be used AS a spray .. .. maybe they have! 

    posted http://www.wholesalesuppliesplus.com/handmade101/how-to-make-recipes/Soothing-Face-Toner.aspx 


    "Preservative - Water Soluble PF (germal plus liquid) is used in this recipe. In the directions for that product it says not to use with sprays or aerosols. This recipe calls for a sprayer. Is that a misprint or mistake?"  Posted By: Ken   |   October 12, 2018


    Staff Answer We have corrected this information. This preservative is not to be used in aerosol products only. It is safe to use in sprays. We apologize for any misinformation we may have listed on this product.



    Posted By: WSP Staff   |   Date: October 26, 2018

    ---------end link

  • Particles from a spray bottle are much bigger and heavier than those from an aerosol, so are less likely to linger in the air, thus less likely to be inhaled/ingested. I think this is the reason that only aerosols are mentioned in the USA/Japan warning.
    I agree it's very confusing that your supplier states that it can't be used in sprays either. You could ask Ashland (manufacturer of Liquid Germall Plus) about this to be 100% certain?

    Liquid Germall Plus does indeed contain a formaldehyde releaser (the diazolidinyl urea). It's safe to use as recommended though. Any substance can be toxic (even pure water), it's all dose/concentration dependent. The amount of formaldehyde that will be released is low enough to be classified as safe for preservative usage in recommended preservative concentrations.
    Remember that the formentioned warnings do not count for the formaldehyde releaser in the Germall, only for the IPBC.

    Good luck with your projects! 
  • @Doreen, I also thought that it's restricted because of Diazolidinyl urea, apparently, it's because of Iodopropynyl Butylcarbamate.
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