I'm trying to formulate a mascara for a client who has some really, uh, weird constraints. No more than 15 ingredients (excluding "may contains") and nothing over a 2 on the EWG database. If it were up to me I'd tell the client to pound sand as this is necessarily hard (or maybe impossible!) to get a volumizing, lengthening mascara with such constraints but it's not up to me.
Thankfully we already have a formulation that *almost* fits. The main issue is the stearic acid, to be neutralized by sodium hydroxide. Sodium hydroxide is a 3 on the EWG. TEA is a 5 or 6, so we straight up can't neutralize the stearic acid with these arbitrary constraints.
What about using sodium stearate? Isn't that the endgame for neutralizing stearic acid with NaOH? Using sodium stearate would essentially skip a step. is this feasible or not?