As a more direct, and possibly side tracking response,
If you really do care about sanitary vaping, try to use PG based e-liquids.
Source: http://www.epa.gov/oppsrrd1/reregistration/REDs/propylene_glycol_red.pdf
As for an independant study on PG:
http://ajph.aphapublications.org/doi/pdf/10.2105/AJPH.36.4.390
If you really do care about sanitary vaping, try to use PG based e-liquids.
Source: http://www.epa.gov/oppsrrd1/reregistration/REDs/propylene_glycol_red.pdf
page 4 paragraph 1 said:Propylene glycol and dipropylene glycol were first registered in 1950 and 1959, respectively, by the FDA for use in hospitals as air disinfectants. (page 4, paragraph 1).
page 6 paragraph 2 said:Indoor Non-Food: Propylene glycol is used on the following use sites: air treatment (eating establishments, hospital, commercial, institutional, household, bathroom, transportational facilities); medical premises and equipment, commercial, institutional and industrial premises and equipment;
page 6 paragraph 6 said:Method and Rates of Application
Air Sanitizer
Read the directions included with the automatic dispenser for proper installation of unit and refill. Remove cap from aerosol can and place in a sequential aerosol dispenser which automatically releases a metered amount every 15 minutes. One unit should treat 6000 ft of closed air space… For regular, non-metered applications, spray room until a light fog forms. To sanitize the air, spray 6 to 8 seconds in an average size room (10’x10′).
page 10 paragraphs 1 & 2 said:General Toxicity Observations
Upon reviewing the available toxicity information, the Agency has concluded that there are no endpoints of concern for oral, dermal, or inhalation exposure to propylene glycol and dipropylene glycol. This conclusion is based on the results of toxicity testing of propylene glycol and dipropylene glycol in which dose levels near or above testing limits (as established in the OPPTS 870 series harmonized test guidelines) were employed in experimental animal studies and no significant toxicity observed.
Carcinogenicity Classification
A review of the available data has shown propylene glycol and dipropylene glycol to be negative for carcinogenicity in studies conducted up to the testing limit doses established by the Agency; therefore, no further carcinogenic analysis is required.
2. FQPA Safety Factor
The FQPA Safety Factor (as required by the Food Quality Protection Act of 1996) is intended to provide an additional 10-fold safety factor (10X), to protect for special sensitivity in infants and children to specific pesticide residues in food, drinking water, or residential exposures, or to compensate for an incomplete database. The FQPA Safety Factor has been removed (i.e., reduced to 1X) for propylene glycol and dipropylene glycol because there is no pre- or post-natal evidence for increased susceptibility following exposure. Further, the Agency has concluded that there are no endpoints of concern for oral, dermal, or inhalation exposure to propylene glycol and dipropylene glycol based on the low toxicity observed in studies conducted near or above testing limit doses as established in the OPPTS 870 series harmonized test guidelines. Therefore, quantitative risk assessment was not conducted for propylene glycol and dipropylene glycol.
As for an independant study on PG:
http://ajph.aphapublications.org/doi/pdf/10.2105/AJPH.36.4.390
The report of the 3 years’ study of the clinical application of the disinfection of air by glycol vapors in a children’s convalescent home showed a marked reduction in the number of acute respiratory infections occurring in the wards treated with both propylene and triethylene glycols. Whereas in the control wards, 132 infections occured during the course of three winters, there were only 13 such instances in the glycol wards during the same period. The fact that children were, for the most part, chronically confined to bed presented an unusually favorable condition for the prophylactic action of the glycol vapor.
An investigation of the effect of triethylene glycol vapor on the respiratory disease incidence in military barracks brought out the fact that, while for the first 3 weeks after new personnel entered the glycolized area the disease rate remained the same as in the control barracks, the second 3 week period showed a 65 percent reduction in acute respiratory infections in the glycol treated barracks. Similar effects were observed in respect to airborne hemolytic streptococci and throat carriers of this microorganism.