Microbial testing of Surfactant

vjayvjay Member
edited July 2014 in Formulating
Hi all 

Generally surfactant contain 30 % to 50 % active matter and remaining water or other impurities.

I am thinking if surfactant contain water 50 to 70 % water so microbial testing is require or not ?

I checked generally surfactants specification does not contain microbial limit or testing.

I want to know that why 30 to 50 % surfactant does not contaminate or microbial testing not require.


  • Hi Vjay,

    If a surfactant contains 50-70% water it should be tested for bacteria/fungi.  If it contains 30-50% water it is less likely to be contaminated, but if it were my cosmetic line, I would still want it tested. 

    Many companies add preservatives to their surfactant blends.
    For testing help visit us at Cosmetic Test Labs
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