Home Cosmetic Science Talk Formulating Odd ingredient declaration - methanol, acetaldehyde, formaldehyde…??

  • Odd ingredient declaration - methanol, acetaldehyde, formaldehyde…??

    Posted by MattTheChemist on November 7, 2025 at 11:47 am

    I have never seen these chemicals listed on an ingredient deck like this. This formula is a US-based, professionally dispensed chemical peel adjuvant. Thoughts? Could they be listing potential residuals from the ethoxylated materials and the denaturants in the alcohol? I wasn’t sure whether this was a new MoCRA requirement or something else!

    MattTheChemist replied 2 minutes ago 2 Members · 3 Replies
  • 3 Replies
  • PhilGeis

    Member
    November 7, 2025 at 1:49 pm

    Diethylene glycol and Methanol too - prob pass risk assessment but why get the attention - 1st cut EWG works on risk elimination not risk assessment. Same with formaldehyde.

    Acetaldehyde is Prop 65 and think prohibited in EU. Another teaser for EWG.

    Don’t why formaldehyde so far down list - support preservative.

    • PhilGeis

      Member
      November 7, 2025 at 2:40 pm

      If ingredient labeled with just “Denatured alcohol” ss here, the denaturants must also be labeled. SD alcohol 3a use methanol as denaturant and is allowed in cosmetics (shampoos, bath and body).

      SD 29 uses acetaldehyde but is not authorized for cosmetics.

      Not aware formaldehyde or diethylene glycol are used a denaturants.

      • MattTheChemist

        Member
        November 8, 2025 at 6:03 pm

        Thanks for the insight, Phil!

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