Glyceryl Caprylate; as emulsifier or as oil in emulsion?

Abdullah

Should i count glyceryl caprylate as part of emulsifier or as part of oil phase in o/w emulsions?

Here is my simple lotion formula
Petrolatum   %4
Olive oil         %6
EO                   %0.4
Glycerin          %3
Xanthan gum  %0.3
Sodium phytate %0.1
Caprylhydroxamic acid %0.15
Glyceryl Caprylate %1
Required hlb 7.26

Polyglyceryl-4 Laurate and glyceryl oleate as emulsifiers

Pharma

Glyceryl caprylate at 1% could be a co-emulsifier and/or a preservative. Given that there are emulsifiers included but the sole preservative is caprylhydroxamic acid is a strong indicator that it's main purpose in this product is as a preservative and hence should be added to the water phase.

Abdullah

@Pharma thanks 
If i use glyceryl caprylate as co-emulsifier with Polyglyceryl-4 Laurate, would that decrease its effectiveness as preservative or not? 

Pharma

It would, unfortunately.

Abdullah

@Pharma so what is the best way to add it to function completely as preservative? 
As it is not water soluble to be added to water phase before emulsion is made.

Pharma

It's dispersible in hot water .

Abdullah

@Pharma ;
That is cool

Abdullah

@Pharma ;
How to add glyceryl caprylate to function as preservative in cold process emulsion? 
Temperature less than or around 40°c