Home Cosmetic Science Talk Formulating Calculating total formaldehyde amount from dmdmH and formalin

  • bill_toge

    November 23, 2021 at 11:22 pm
    it won’t, because the amount of active preservative in the raw material is around 55% - the rest is water, so it would contain the equivalent amount as 0.055% formalin
    also, the amount of free formaldehyde is considerably less than than that (1% at most), as the rest of it is bound to the DMDM hydantoin molecule (the two -CH2OH groups attached to the nitrogens) and is only released when microbes attempt to ingest it
    so the actual amount of formaldehyde in solution is equivalent to 0.00055% formalin at most
  • abdullah

    November 24, 2021 at 1:36 am

    @Bill_Toge thanks for explanation.

    One more question.
    If in DMDM hydantoin 45% is wayer and ~18% is total formaldehyde, what is the rest of that? And does it function as a strong preservative as the rest of formaldehyde? 

  • abdullah

    November 24, 2021 at 3:18 am

    This is the composition of DMDM hydantoin. That is why i said if 0.2% DMDM hydantoin is equivalent to ~0.1% formalin.

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