Which one stronger? Phenoxyethanol+glyceryl Caprylate or sorbitan Caprylate?

Yeah they will not be very strong but in shampoo at pH 5 ot lotion at pH 4 which one of these preservatives don't be stronger?


Phenoxyethanol+sorbitan Caprylate 7/3 at 1%
Phenoxyethanol+glyceryl Caprylate 7/3 at 1%

Comments

  • PhilGeisPhilGeis Member, Professional formulator
    Both are wrong.
    Where effective Phenoxyethanol is usually fine at 5000 ppm and the other two are pretty useless in any application.  Pseudomonads have plenty of esterases.


  • @PhilGeis there is a blend Nipaguard SCP by Clariant phenoxyethanol/sorbitan Caprylate 7/3. I wanted how will it performs if we use glyceryl Caprylate instead of sorbitan Caprylate in this blend.
  • PhilGeisPhilGeis Member, Professional formulator
    Don't waste your money on either - supplier marketing hype.   Efficacy would be phenoxyethanol.
  • AbdullahAbdullah Member
    edited October 2
    @PhilGeis I will not purchase them but i have some glyceryl Caprylate in stock and wanted use it in combination with phenoxyethanol in shampoo pH 5 or lotion pH 4 with 0.2% EDTA in both if possible. 
  • PharmaPharma Member, Pharmacist
    PhilGeis said:
    ...Pseudomonads have plenty of esterases.
    This would result in free caprylic acid and, at least in vitro, caprylic acid shows some antimicrobial efficacy and reduces biofilm formation. :smile:
  • PhilGeisPhilGeis Member, Professional formulator
    edited October 2
    Doubt it pharma - lauric might but the longer chain fatty acids  do not and would more likely undergo beta oxidation as substrate for the pseudomonads.
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