| In your document the Cat 4 exposure dose was stated to be 2.34 mg/L, a recent study[0] found that inhalation exposure at 0.442 mg/L resulted in slight irritation. What's the exposure when vaping? The document you link to actually avoids addressing Aggregate Exposure by stating there's insufficient information to draw any conclusions. > "Since toxicological endpoints for risk assessment were not identified based on the available data, an aggregate risk assessment was not conducted for propylene glycol and dipropylene glycol." Isn't Aggregate Exposure what we're concerned about with Vaping? Additionally these studies all talk about aeroslized or nebulized pg, vaporizers are thermal in nature. Does heating pg matter? The CDC is basically saying "We don't know what this shit does because no studies have ever exposed people to it in this manner. Until we know more you should probably not vape it". [0] Dalton P, Soreth B, Maute C, Novaleski C, and Banton M (2018). "Lack of respiratory and ocular effects following acute propylene glycol exposure in healthy humans". Inhal. Toxicol. 30: 124–132. |