Hi everyone, I'm hoping to get an expert's opinion on the safety of scenting salt-based bath products (bath salts, bath bombs, etc.) with oil-based fragrances.
The way I understand it, the salts must also contain either enough carrier oil to dilute the fragrance to IFRA recommended level, or enough solubilizer/surfactant to disperse the fragrance into the bath water in order to be safe. Otherwise, once the salts dissolve, you have a slick of pure fragrance oil sitting on top of the bath water.
Introduction to Cosmetic Formulation and Technology (2015) makes a passing reference to the fact that "bath beads and bath salts... are made of water-soluble ingredients...." Would that imply that in mass production, they are scented with water-soluble fragrances altogether avoiding this issue?
Thanks so much for your thoughts on this!