Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Formaldehyde molecular states in the gas phase.

Authors
Utterback-DF
Source
Department of Environmental Health Sciences, School of Public Health, University of South Carolina, Columbia, South Carolina 1987 Jun; :1-3
Link
NIOSHTIC No.
00182753
Abstract
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.
Keywords
NIOSH-Grant; Grants-other; Molecular-structure; Chemical-analysis; Physical-properties
Contact
Environmental Health Sciences University of South Carolina School of Public Health Columbia, S C 29208
CAS No.
50-00-0
Publication Date
19870623
Document Type
Final Grant Report
Funding Amount
4948.00
Funding Type
Grant;
Fiscal Year
1987
NTIS Accession No.
PB89-131205
NTIS Price
A01
Identifying No.
Grant-Number-R03-OH-02377
NIOSH Division
OEP
Priority Area
Other Occupational Concerns; Grants-other
Source Name
Department of Environmental Health Sciences, School of Public Health, University of South Carolina, Columbia, South Carolina
State
SC
Performing Organization
University of South Carolina at Columbia, Columbia, South Carolina
TOP