USP 51 vs ISO 11930 test?

domicanicadomicanica Member
Can anyone provide insight into which PET is suitable or better for body products, specifically body wash and O/W body lotion? I'm not sure whether I should choose the USP 51 test or the ISO 11930 test and from my readings the tests appear to be the same. I can't really base it on my location because there's no regulatory requirements when it comes to these things where I live and I don't want to choose the cheaper test just because it's cheaper. Any insight or advice is very much appreciated.


  • singhc10singhc10 Member
    ISO 11930 is written for only cosmetics, while the USP 51 covers testing of cosmetics, NHPs and drugs. If you are in North America, you can go with USP 51.
  • PhilGeisPhilGeis Member, Professional formulator
    In execution, these (with EP 5.1.3. EFFICACY OF ANTIMICROBIAL PRESERVATION) are about the same.  There are major differences in success criteria.  You can go with any but, as none has been validated for cosmetics, suggest you defer to ISO 11930 criteria.
  • Thanks @singhc10 and @PhilGeis.

    Another question: I am making 2 different products, a body wash and a body lotion. These will come in 5 different scent variations each, lavender, coconut, sandalwood, eucalyptus and unscented. Do I need to send one sample of each product in each scent or would it be sufficient to only send the unscented ones plus 1 scented body wash and 1 scented lotion?
  • PhilGeisPhilGeis Member, Professional formulator
    Prob ok - what is perfume % in formula.
  • Just 1-2%. 
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