[Kriggs]

I appreciate everyone’s weigh-in and am open to implementing a new preservative system under the potential pH range of 4.5-6. Ideally this preservative system would be as “clean as possible” and phenoxyethanol-free.

(PET would be USP 51 but I do not find that challenge test robust enough with true substantiation, especially when it comes to high aqueous content in conjunction with the product being a saturated non-woven).

Having said that, it is extremely frustrating trying to find an efficacious and broad-spectrum preservative system that is considered to be “clean” by the consumer , while being robust enough to pass the PCPC criteria. I am hoping to gain at least one of the following:

1) Find an ingredient/s that can reduce or eliminate the potassium sorbate yellowing given the parameter that the target pH range is 4.5-5.5

2) If Sodium benzoate + potassium sorbate is not a sufficient preservative system on its own, what additional “clean” preservative system or ingredient should be added? (pH 4.5-5.5)

3) A “clean” preservative system replacement for the SBPS with a broadening of the pH range to 4.5-6.

[Kriggs]

I concur with Zoya’s above recommendation.

I would also like to ask what your water and oil phase addition instructions look like. It is imperative that you are using the proper method of addition in conjunction with appropriate temperature and mixing.

[Kriggs]

Apologies, the current preservative system is sodium benzoate + potassium sorbate + Ethylhexylglycerin

[Kriggs]

I appreciate your willingness to help.

I fully concur that “clean” is a very subjective word and fleeting. The current pH is 4.5-5 in order to accommodate the current preservative system (sodium benzoate + potassium sorbate). This pH would be able to be adjusted but I would not like to go above 6 as this would not be beneficial for use on a baby’s skin and its own pH.

-intended PET: USP 51 and PCPC M5

[Kriggs]

Hi Phil,

Thanks for the response. This project is for a “clean” phenoxyethanol-free baby wipe and I am currently using sodium benzoate and potassium sorbate as the preservative system. Would you have a recommendation for this system replacement?