Not to be negative but I thought that I'd share that I found this.. isn't much but I didn't see this information posted anywhere on here.
[FONT=Verdana, Arial, Helvetica, sans-serif]Propylene Glycol[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif]A cosmetic form of mineral oil found in automatic brake and hydraulic fluid and industrial antifreeze. In the skin and hair, propylene glycol works as a humescent, which causes retention of moisture content of skin or cosmetic products by preventing the escape of moisture or water. The Material Safety Data Sheet warns users to avoid skin contact with propylene glycol as this strong skin irritant can cause liver abnormalities and kidney damage.[/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]Known health effects.[/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]Eye irritation, skin irritation, skin drying, defatting. Ingestion has serious health effects similar to above.[/FONT]