Propylene glycol inhaling?

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Super Member
ECF Veteran
Jun 30, 2009
Albany, NY

I am about to try this e-cigarette, have just bought a unit.

In respect to atomizing in this instance, it is not changing the chemical structure of the liquid, it is simply converting it into a mist/vapour.

VG CAN convert to acrolein (sp?) At high temps. Generally higher than any e_cig will provide, but some people seem to have issues with PG because of allergies...


Super Member
ECF Veteran
Nov 11, 2009
Independence, KY USA
So have any tests actually been done to determine if it's bad to be inhaling this stuff all day? Who knows, maybe it's worse than tobacco? I doubt it, but has it actually been tested at all? I know they have tested it somewhat because they use smoke machines and stuff all the time.. but that's just inhaling a bit that's in the air, it's not really the same.
Let's see what the EPA thinks about it.

Air Sanitizers | Pesticides | US EPA

Seriously though this had to have been posted about a million times right?

How about this one.

"Propylene glycol, the primary ingredient in the electronic cigarette cartridge, may be a powerful deterrent against pneumonia, influenza, and other respiratory diseases when vaporized and inhaled according to a study by Dr. Oswald Hope Robertson. Decades before the e cigarette was invented, a study was conducted by Dr. Robertson of the University of Chicago's Billings Hospital in 1942 on inhalation of vaporized propylene glycol in laboratory mice. A more in-depth article was printed in the 1942 issue of TIME Magazine,9171,932876,00.html for November 16th. "Dr. Robertson placed groups of mice in a chamber and sprayed its air first with propylene glycol, then with influenza virus. All the mice lived. Then he sprayed the chamber with virus alone. All the mice died."

The researchers also found that "the propylene glycol itself was a potent germicide. One part of glycol in 2,000,000 parts of air would--within a few seconds--kill concentrations of air-suspended pneumococci, streptococci and other bacteria numbering millions to the cubic foot."

Clinical trials on electronic cigarettes containing propylene glycol were carried out in New Zealand by Dr. Murray Laugeson of Health New Zealand and can be found on the website of SS Choice LLC at under the tab "Media Coverage." Far from posing a threat to our health, the propylene glycol in e cigarettes might just keep us healthy. Further studies should be done on the effects of propylene glycol to determine if it can be used successfully as a virus prevention tool. Wouldn't it be wonderful if the best flu preventative was right under our noses all this time?"

here's a few more for you just in case you are curious. look for these clinical trials and testimony in a raiders of the lost arc warehouse near you

Bigg, E., B.H. Jennings, and F.C.W. Olsen. 1945. Epidemiological observations on the use of glycol vapors for air sterilization. Am. J. Public Health 35:788-798.

Challinor, S.W. and J.P. Duguid. 1944. Propylene glycol as an air disinfectant. I. Edinburgh Med. J. 51:280-289.

Dimmick, R.L. and A.B. Akers (Eds.). 1969. An Introduction to Experimental Aerobiology. Wiley-Interscience, New York.

Greene, V.W., D. Vesley, R.G. Bond, and G.S. Michaelsen. 1962. Microbiological contamination of hospital air. I. Quantitative studies. Appl. Microbiol. 10:561-566.

Gregory, P.H. and J.L. Monteith (Eds.). 1967. Airborne Microbes. Cambridge Univ. Press, London.

Hall, L.B. 1962. Air sampling for hospitals. Hospital Topics 40:97-100.

Hamburger, M.J., O.H. Robertson, and T.T. Puck. 1945. The present status of glycol vapors in air sterilization. Am. J. Med. Sci. 209:162-166.

Kerlan, I. 1950. Glycol vapors for air sanitation...the F.D.A. view. Soap Sanitary Chem. 26(2):122-124.

Lester, W.,Jr., O.H. Robertson, T.T. Puck, and H. Wise. 1949. The rate of bactericidal action of triethylene glycol vapor on microorganisms dispersed into the air in small droplets. Am. J. Hyg. 50:175-188.

Lester, W.,Jr., S. Kaye, O.H. Robertson, and E.W. Dunklin. 1950. Factors of importance in the use of triethylene glycol vapor for aerial disinfection. Am. J. Public Health 40:813-820.

Lester, W.,Jr., E. Dunklin, and O.H. Robertson. 1952. Bactericidal effects of propylene and triethylene glycol vapor on Escherichia coli. Science 115:379-382.

McConnell, W.J. 1949. An experiment with triethylene glycol vapor for the control of colds among office workers. Ind. Med. 18:192-196.

McGray, R.J. 1970. A test method for the evaluation of air sanitization. Proc. Chem. Specialties Manufact. Assoc., pp. 106-111.

Puck, T.T., O.H. Robertson, and H.M. Lemon. 1943. The bactericidal action of propylene glycol vapor on microorganisms suspended in air. II. The influence of various factors on the activity of the vapor. J. Exper. Med. 78:387-406.

Puck, T.T. 1947. The mechanism of aerial disinfection by glycols and other chemical agents. II. An analysis of the factors governing the efficiency of chemical disinfection of the air. J. Exper. Med. 85:729-757.

Robertson, O.H., E. Bigg, B.F. Miller, Z. Baker, and T.T. Puck. 1941. Sterilization of air by certain glycols employed as aerosols and vapors. Trans. Assoc. Am. Physicians 56:353-358; Science 93: 213-14.

Robertson, O.H. 1943. Sterilization of air with glycol vapors. Harvey Lect. 38:227-254.

Robertson, O.H., B.F. Miller, and E. Bigg. 1943. Method of sterilizing air. U. S. Patent No. 2,333,124.

Rosebury, T. 1947. Experimental Airborne Infection. Williams and Wilkens, Baltimore.

Stuart, L.S. and J.L. Friedl. 1955. Testing aerosol products for germicidal and sanitizing activity. Proc. Chem. Specialties Manufact. Assoc., pp. 93-97.

Wolf, H.W., et al. 1959. Sampling microbiological aerosols. Public Health Service Publication No. 686, Washington.
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PV Master & Musician
ECF Veteran
May 22, 2010
Central GA
We will continue to get beat up over something that is virtually untested in the U.S. except by a cursory FDA test that mentioned dangers from being purchased by children and the chocolate and vanilla flavorings available. They also mentioned nitrosamines but didn't mention that they were just above the level of detection, not sky high like in analogs.

PG is commonly used in the medical profession for asthma inhalers and intravenous medicines. I bought a bottle of sno-cone liquid the other day and guess what is on the label? Wait for it ... propylene glycol! The kids are already getting it. Yes, I'm a label reader. It's probably used as a thickening agent and it is in some salad dressings. I can just picture someone in a restaurant complaining that "Propylene glycol is in those e-cigs! That's a component of anti-freeze!", while he pours salad dressing on his lettuce...

If it looks like a duck and walks like a duck, it must be a duck...
It it is white, has a filter thingy, and the guy blows smoke, it must be a ..... (insufficient evidence).
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