This preservative is "Paraben Free" which is much less likely to cause skin irriation. Germall Plus is a patented combination of 99% Germall II (Diazolidinyl Urea), the most active member of the Imidazolidinyl Urea family of preservatives, and 1% Iodopropynyl Butylcarbamate (IPDC)
Germall Plus is a highly effective, broad spectrum, non-paraben preservative for oil-in-water and water-in-oil emulsions and water soluble formulations. Germall Plus has no known chemical inactivators. It is compatible with virtually all cosmetic ingredients, including complex ingredients such as proteins and surfactants. As a result, Germall Plus can be incorporated into a variety of leave-on and rinse-off cosmetic and personal care formulations for reliable preservation.
INCI: DIAZOLIDINYL UREA (and) IODOPROPYNYL BUTYLCARBAMATE Suggested Usage Rate: from 0.02 up to 0.05% Solubility: Water