Just found this, sorry if it has been posted already.
TESTS FOR THE CHRONIC TOXICITY OF PROPYLEXE GLYCOL AND TRIETHYLENE GLYCOL ON MONKEYS AND RATS BY VAPOR INHALATION AND ORAL ADMINISTRATION -- ROBERTSON et al. 91 (1): 52 -- Journal of Pharmacology And Experimental Therapeuticshttp://jpet.aspetjournals.org/cgi/content/abstract/91/1/52
Hope it's ok to post the actual link...http://jpet.aspetjournals.org/cgi/content/abstract/91/1/52
TESTS FOR THE CHRONIC TOXICITY OF PROPYLEXE GLYCOL AND TRIETHYLENE GLYCOL ON MONKEYS AND RATS BY VAPOR INHALATION AND ORAL ADMINISTRATION -- ROBERTSON et al. 91 (1): 52 -- Journal of Pharmacology And Experimental Therapeuticshttp://jpet.aspetjournals.org/cgi/content/abstract/91/1/52
Hope it's ok to post the actual link...http://jpet.aspetjournals.org/cgi/content/abstract/91/1/52