Efficacy comparison of same level of total formaldehyde from formalin vs DMDM hydantoin

AbdullahAbdullah Member
edited February 2022 in Advanced Questions
According to this chart 290 ppm DMDM hydantoin that has 92ppm total formaldehyde in it has the same efficacy as 60 ppm formaldehyde. 
As this data is from supplier, i wanted to ask you
does the same amount of total formaldehyde for example 200ppm from DMDM hydantoin vs from formalin has the same efficacy or formalin is 50% more effective as in this data?

0.115% DMDM hydantoin 55% (200 ppm total formaldehyde)
vs
0.054% formalin ( 200ppm total formaldehyde)


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Comments

  • samiditsamir_roubahisamiditsamir_roubahi Member
    If I want to use the following preservatives together in one Cream or Lotion recipe (formula) what will be the ratio or percentages to be used safely:
    DMDM Hydantoin
    Methyl paraben
    Propyl Paraben

    My email: learnmodernreiki@yahoo.com
  • PhilGeisPhilGeis Member, Professional formulator
    edited February 2022
    2500/2000/1000 ppm respectively with EDTA
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