- Reaction score
- 42
Chemicals like propylene glycol and glycerin are used in topical minoxidil preparations first and foremost as solvents. Everybody wants a 5% solution (don't get me started on the "Numbers Game"), and without one or the other of those chemicals, you wouldn't even be able to HAVE a 5% minoxidil solution. Pure ethanol only dissolves minoxidil to about 2.9%, whereas pure PPG dissolves it to about 7.5% or so. So you gotta put SOMETHING extra in the solution to be able to get it up to 5% minoxidil.
Both PPG and glycerin are humectants. That's why PPG is used in cigar humidors, for example. PPG permeates through the skin better than glycerin, according to the Merck Index, but more people are allergic or sensitive to PPG than glycerin. Either one should help counter the drying effects of alcohol on the skin.
Bryan
Both PPG and glycerin are humectants. That's why PPG is used in cigar humidors, for example. PPG permeates through the skin better than glycerin, according to the Merck Index, but more people are allergic or sensitive to PPG than glycerin. Either one should help counter the drying effects of alcohol on the skin.
Bryan