Hi !
My goal is to create lotion with NaoH /stearic acid as emulsifier.
My oil phase is:
15% mineral oil
20% isopropyl myristate
I need to calculate how much NaOH is needed to saponify 5% stearic acid.
Chemical reaction will be as follow:
C₁₇H₃₅COOH + NaOH ⇒ C₁₇H₃₅COONa + H₂O
My question is should I included saponification value for stearic acid or treat this calculation as normal proportion:
284.4772 g/mol - 40 g/mol
5% - x
Second option as I have mentioned is taking into account saponification value for stearic acid which is between 206 and 212, so let's say for calculation purpose we will take 209.
So then I would have to recount amount KOH for the NaOH.
It seems to be easy, but I think I am lost here !
Any help ?
