Home Cosmetic Science Talk Formulating What ingredients make Zinc Ricinoleate less irritating?

  • What ingredients make Zinc Ricinoleate less irritating?

    Posted by Rhys on October 31, 2024 at 6:18 pm

    Hi there,

    I’m making a natural roll-on deodorant.

    I have a good base formula I’m using learnt from IPCS.

    That works great, but I wanted some added performance so I added 1% Zinc Ricinoleate and reduce the water by 1%.

    Its highly performant but after about a week my armpits are irritated and dry.

    Has anyone used Zinc Ricinoleate but needed to add certain emollients or moisturising ingredients to make its daily application sustainable?

    Right now all I am using is 1.5% Isoamyl Laurate.

    Do other emollients work better for this ingredient? ie: Coco-Caprylate/Caprate, niacinamide, squalane, or is it better using something with soothing properties like Histidine?

    Thanks.


    • This discussion was modified 1 month, 3 weeks ago by  Rhys.
    Rhys replied 1 month, 1 week ago 3 Members · 4 Replies
  • 4 Replies
  • ketchito

    Member
    November 1, 2024 at 8:10 am

    Did you try the same formula without Zinc ricinoleate? I see you’re using lavender essential oil at high dose, so I’d think has more chances to cause thebissues than Zinc ricinoleate.

    • Rhys

      Member
      November 15, 2024 at 3:55 am

      Thanks @ketchito I have tried without Zinc Ricinoleate, essential oils and preservatives and they are all fine. As soon as I add the Zinc Ricinoleate, that’s when the irritation comes.

      • This reply was modified 1 month, 1 week ago by  Rhys.
  • ozgirl

    Member
    November 4, 2024 at 7:27 pm

    Perhaps something like Ethylhexylglycerin (Sensivia SC) would be a better option than Zinc ricinoleate. It is multifunctional with deodorant and emollient properties.

    • Rhys

      Member
      November 15, 2024 at 4:11 am

      Thanks @ozgirl I just bought that to help as an emollient for Zinc Ricinoleate. I’ll try just that as I can see it has a deodorising effect.

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