Cosmetic Science Talk

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Home Cosmetic Science Talk Advanced Questions DMDM hydantoin vs phenoxyethanol comparison as antibacterial for a lotion

  • PhilGeis

    Member
    January 31, 2022 at 1:29 pm

    2000-3000 ppm is what I’d use

  • Abdullah

    Member
    January 31, 2022 at 3:18 pm

    @PhilGeis  2000 ppm of 55% solution with is 1100ppm actual DMDM hydantoin. Am i correct? 

  • PhilGeis

    Member
    January 31, 2022 at 4:38 pm

    I referred to active concentration.

  • Abdullah

    Member
    February 1, 2022 at 2:12 am

    PhilGeis said:

    I referred to active concentration.

    Thanks. 
    I didn’t know phenoxyethanol is that good as anti bacterial preservative compared to DMDM hydantoin.

  • Perry

    Member
    February 1, 2022 at 3:13 am

    @Abdullah - one of the problems with phenoxyethanol is the odor.

  • Abdullah

    Member
    February 1, 2022 at 7:33 am

    Perry said:

    @Abdullah - one of the problems with phenoxyethanol is the odor.

    Yes. 
    And for me reducing emulsion stability and viscosity of product is also a problem. But these two are the only options for bacteria i think. 

  • PhilGeis

    Member
    February 1, 2022 at 12:06 pm

    You can use combinations of others based on pH but would need testing 

  • Abdullah

    Member
    February 1, 2022 at 2:06 pm

    PhilGeis said:

    You can use combinations of others based on pH but would need testing 

    Yes but as these two are the least expensive, i have to stick with one or both of these two.

  • PhilGeis

    Member
    February 1, 2022 at 4:40 pm

    There also better than the odd combination

  • Abdullah

    Member
    February 2, 2022 at 2:09 am

    PhilGeis said:

    There also better than the odd combination

    Yes