This is my first post here so please bear with me
I've been researching the presevative Euxyl PE 9010 (INCI: Phenoxyethanol, ethylhexylglycerin) and its suitability for different types of products.My question is: do you have any experience using it in water based cleansers (with non-ionic and non ethoxylated surfactants) or water based serums ? Do you find that you need to use a solubilizer for the latter?
Here's what I found so far regarding this matter:1. Usage rate :
0.5 - 1 % (recommended 0.6 - 0.7% by some suppliers)2. Solubility:
It is only partially soluble in water-based products
while most soluble in oil based products. It is best used in creams, lotions
and serums.3. Use in solutions and water based products like serums:
- Some websites state that it has a water solubility of 1% at 20°C and so If used in a percentage lower than 1% it can be
used in tonics and aqueous solutions without the addition of a solubilizer.
- Others suggest blending it with glycerin or sorbitol before adding it to the formula.
- Others suggest just using a solubilizer (any recs?)4. Use in cleansers with surfactants:
- Phenoxyethanol is inactivited by highly
ethoxylated compounds including polysorbates so do not use with
surfactants. --> What about non ionic non ethoxylated surfactants?
- In surfactant solution systems, the water must
be saturated with phenoxyethanol for activity (??)
If the level is too low, it acts as a nutrient for bacteria (??). However, it
can cause viscosity issues in detergent products.
- I've seen cleansers with this preservative on the market so I'm thinking it's possible to use it? If it is, how would you incorporate it in the formula?
Sorry for the long post! I just wanted to share what I've found and ask for you experience on the matter. Any advice or suggestions would be greatly appreciated