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Formaldehyde molecular states in the gas phase.
Department of Environmental Health Sciences, School of Public Health, University of South Carolina, Columbia, South Carolina 1987 Jun; :1-3
The gas phase reaction of N,O-bis-(trimethylsilyl)trifluoroacetamide (BSTFA) with polar organics was validated. Quantitative yields were obtained for alcohols, glycols, glycol ethers and amines using the gas phase derivatization method. These values were then compared with the expected yields from vapor pressure tables. For the formation of methylene-glycol from the reaction of formaldehyde (50000) with water, equilibrium constants were estimated at temperatures ranging from 20 to 40 degrees-C. Gas streams of formaldehyde in air were produced by a gas phase monomeric formaldehyde generator based on acid catalyzed depolymerization of s- trioxane. The formaldehyde was subsequently reacted with water vapor in the air. The chromotropic-acid method was used to determine the concentration of formaldehyde equivalents and BSTFA derivatization method to determine the concentration of methylene- glycol. Temperature dependency of the equilibrium constant is graphed.
NIOSH-Grant; Grants-other; Molecular-structure; Chemical-analysis; Physical-properties
Environmental Health Sciences University of South Carolina School of Public Health Columbia, S C 29208
Final Grant Report
NTIS Accession No.
Other Occupational Concerns; Grants-other
Department of Environmental Health Sciences, School of Public Health, University of South Carolina, Columbia, South Carolina
University of South Carolina at Columbia, Columbia, South Carolina
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division