Ethyl alcohol or ethanol is more safer alcohol for health in applications such as lotions, creams, etc. isopropyl is not recomended for this
same is 1 ingredient that 20...
you can make your formula only with alcohol if your skin resists it
all togeher seek the best disolution, penetration and persistence but that does not harm your skin drying up or leaving your hair greasy.
More alcohol evaporates too fast and dries your skin, more water will not dissolve sandalore, pg is solvent and moisturizer but there are allergic people. Dmso is a powerful solvent with penetration into skin...
Sandalore aprox 0.5ml (mixed in 100ml of other things) and all focused on disolution, penetration and persistence