• Formulating

  Preservative help.

  Posted by amitvedakar on October 10, 2025 at 5:37 am

  I am using parabens for preservative in cream containing White Petrolatum, Liquid Petrolatum, BHT, Glycerin, Propylene Glycole, fragrance, Cetosteryl alcohol, Cm1000 & vitamin E.

  I want to replace paraben preservatives with Ethylhexylglycerin & Phenoxyethanol (mix)

  SMP==0.2% & SPP-0.05%

  what % should i use of ETHYLHEXYlglycerin & PE2?

  @PhilGeis

  IS 0.7-0.8% ok?

  amitvedakar replied 5 hours, 14 minutes ago 2 Members · 5 Replies
• 5 Replies

• 

  Graillotion

  Member

  October 10, 2025 at 2:50 pm

  PE9010 as you know is 90% Phenoxy and 10% CG. (Listed right in the name. 😁 )

  Typical top end of the use rate is 1%….so you can do the math.

  PE 9010 is weak on YMF….so I would look to address this concern with an additional aide.

  Aloha.

  • This reply was modified 13 hours, 55 minutes ago by  Graillotion.
  • 

    Graillotion

    Member

    October 10, 2025 at 4:15 pm

    After re-reading my comment….I did not mean to imply….using 1%. With a minimal bug food formula like yours….if it were mine….I would use a total amount of .7 to .8%….plus a boost on YMF. Look at total picture…quality of water, packaging, pH…and mfg GMP.

    Since I use a repacker to source my 9010… I add a little more than possibly needed….to cover those aspects. 😅

    • This reply was modified 12 hours, 28 minutes ago by  Graillotion.
    • This reply was modified 12 hours, 27 minutes ago by  Graillotion.
    • 

      amitvedakar

      Member

      October 10, 2025 at 11:10 pm

      Thank you.

      we use DM.

      Well what about using ehtylhrxyl -0.3% & PE 0.5% Separately.

      well 1% mix will also helpful as this moisturizing cream.

      • This reply was modified 5 hours, 34 minutes ago by  amitvedakar.
      • 

        Graillotion

        Member

        October 10, 2025 at 11:26 pm

        I see I made an error in my haste…. 9010 does not contain CG….(that is Optiphen). It contains 10% EHG….which of course translates into .1% in formula…assuming max rate of 9010.

        The EHG is simply a penetration enhancer. Use of various glycols (longer chain) can also achieve this in formula as well. EHG can and is used at up to 1% in some formulas, especially deodorant products.

        Regarding Phenoxy….it is reasonable on Gram - and weaker on Gram +. As mentioned before that package is weak on YMF….so I would be looking for something to bolster Gram + and YMF…if I were wanting to be at ‘sleep well at night’ performance standards. 😴

        • This reply was modified 5 hours, 17 minutes ago by  Graillotion.
        • 

          amitvedakar

          Member

          October 10, 2025 at 11:31 pm

          what is your suggestion for adding Sodium Benzoat Or benzyl alcohol to boost preservation?

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