Before preservative testing

We are getting ready to send our products to Microbiological Preservative Efficacy Test, Cosmetic Product Stability Testing and a Cosmetic Product Safety Report. We where thinking about using NaturallyThinking, but if you have any other recommendations, please let me know. Before we do this, to save time, I would like to discuss the preservatives that our formulators have used and the packaging. 

The packaging is Lumson TAG Techno Airless Glass bottles. This is a completely airless bottle with a pouch inside where the product is inserted. We are also using plastic tubes for some of our products. The products use many Active Concepts ingredients preserved with Leucidal Liquid.

The preservatives we intend on using is Lexgard® Natural (glyceryl caprylate (and) glyceryl undecylenate), Dermosoft® 688 (p-Anisic Acid) and Dermofeel ® PA-3 (Sodium Phytate, Water, Alcohol).


  • Bill_TogeBill_Toge Member, Professional Chemist
    for challenge testing, I'd recommend MelBec Microbiology in Lancashire - we use them regularly and they're a good reliable test house

    for safety assessments, I'd recommend EF Chemical Consulting - reliable again, they take a sensible approach, and their turnaround times are usually prompt

    don't know about stability testing though, we do that in-house

    now I've never used NaturallyThinking, but they seem to outsource everything to third parties (they won't let you speak to any staff other than the receptionist if you try to phone them), and the fee they charge for a safety assessment is absurdly low - they definitely seem too good to be true!
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • BobzchemistBobzchemist Member, PCF student
    You might also want to reach out to Inolex and/or Dr Straetman's to see if they'd be willing to run any of the micro testing for you.
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
  • PerryPerry Administrator, Professional Chemist
    If you're located in the US, Cosmetic Test Labs is a good resource for getting micro testing done.
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