Home Cosmetic Science Talk Formulating Cyclopentasiloxane


  • Cyclopentasiloxane

    Posted by ozgirl on May 28, 2015 at 12:33 am

    I came across this information this morning that I thought I would share. I’m not sure if others have seen it or not yet.

    The Scientific Committee on Consumer Safety (SCCS) has released its updated opinion on Cyclopentasiloxane.


    (1) On the basis of the data provided does the Scientific
    Committee on Consumer Safety (SCCS) consider Cyclopentasiloxane (D5) safe as
    cosmetic ingredient?

    The SCCS considers that the use of Cyclopentasiloxane (D5)
    in cosmetic products is safe except for use in body lotion and hair styling
    formulations and in those product forms that can give rise to lung exposure of
    the consumer through inhalation, e.g. aerosols, pressurised sprays, powders,

    This is because Margin of Safety based on the Point of
    Departure is less than 100 for the oral and inhalation routes, using the
    maximum concentrations reported by the applicant of 92% and 85% of D5
    respectively in the finished product for application in body lotion and hair
    styling formulations in inhalable delivery forms.

    Aggregate exposure to Cyclopentasiloxane (D5) via cosmetic
    products is not safe as driven by the use of body lotion and hair styling
    aerosol with high concentrations of Cyclopentasiloxane (D5).

    ala replied 8 years, 7 months ago 6 Members · 8 Replies
  • 8 Replies
  • belassi

    May 28, 2015 at 5:08 am

    See pages 49 on, (the PDF; the other link is not useful)

    The quoted usage for face cream was 93% cyclo, and for hand cream 82%, well, for heaven’s sake who would use that much?
    I checked and I have in our hand cream 0.25% cyclopentasiloxane. Big deal!
  • ozgirl

    May 28, 2015 at 5:15 am

    I was thinking the same thing about usage rates.

  • Ruben

    May 28, 2015 at 6:57 pm

    @ Belassi I’m just curious. Do you get any effect at 0.25%?

  • belassi

    May 28, 2015 at 7:08 pm

    Yes, sure, 0.25% is noticeable. 

  • chemist77

    May 28, 2015 at 7:43 pm

    @Ruben I think it would depend on the type of formulation too, maybe in an anhydrous formula it is perceptible but in case of a regular oil in water emulsion I doubt if 0.25% can be felt on skin. But this is my perception, @Belassi might be correct in his observation.

  • David

    May 28, 2015 at 9:18 pm

    how is it possible to make a body lotion with 92% cyclopentasiloxane?

  • ozgirl

    May 28, 2015 at 9:58 pm

    @David My only guess is that it is an anhydrous formulation but that isn’t what I personally would consider a body lotion.

  • ala

    July 17, 2015 at 1:07 pm

    Do you have maybe proposals of alternatives for cyclopentasiloxane that could be used in antiperspirants?

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