Impact of glycol-based solvents on indoor air quality-Artificial fog and exposure pathways of formaldehyde and various carbonyls was written by Guo, Xinyang;Ehindero, Toluwatise;Lau, Chester;Zhao, Ran. And the article was included in Indoor Air in 2022.Related Products of 57-55-6 This article mentions the following:
Artificial fog is commonly employed in the entertainment industry and indoor household celebrations. The fog is generated from glycol-based solvents, which can also be found in e-cigarettes and personal care products. Although potential health impacts of glycol inhalation are frequently cited by studies of e-cigarette smoking, the dynamics and the chem. composition of glycol-based aerosols have never been studied systematically. The objective of this work is to investigate the impact of glycol-based aerosol on indoor air quality. Specifically, we targeted artificial fogs generated with common glycols, including propylene glycol (PG) and triethylene glycol (TEG). With the aid of a novel aerosol collecting and monitoring instrument setup, we obtained time-resolved aerosol profiles and their chem. compositions in an exptl. room. Artificial fog has given rise to a significant amount of ultra-fine particulate matter, demonstrating its neg. impact on indoor air quality. Addnl., we found a high concentration (9.75 mM) of formaldehyde and other carbonyls in fog machine fluids stored for months. These compounds are introduced to the indoor air upon artificial fog application. We propose that carbonyls have accumulated from the oxidative decomposition of glycols, initiated by OH radicals and singlet oxygens (1O2) and likely sustained by autoxidation Oxidation of glycols by indoor oxidants has never been reported previously. Such chem. processes can represent an unrecognized source of toxic carbonyl compounds which is also applicable to other glycol-based solvents. In the experiment, the researchers used many compounds, for example, 1,2-Propanediol (cas: 57-55-6Related Products of 57-55-6).
1,2-Propanediol (cas: 57-55-6) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. Tertiary alcohols cannot be oxidized at all without breaking carbon-carbon bonds, whereas primary alcohols can be oxidized to aldehydes or further oxidized to carboxylic acids.Related Products of 57-55-6
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts