Appendix Propylene Glycol

This report is the second volume in the series Acute Exposure Guideline Levels for Selected Airborne Chemicals. AEGL reports for aniline, arsine, monomethylhydrazine, and dimethylhydrazine were reviewed in the first volume. AEGL documents for five chemicals—phosgene, propylene glycol dinitrate, 1,1,1,2-tetrafluoroethane, 1,1-dichloro-l-fluoroethane, and hydrogen cyanide—are published as an appendix to this report. The subcommittee... 

APPENDIX C DERIVATION SUMMARY FOR ACUTE EXPOSURE GUIDELINE LEVELS PROPYLENE GLYCOL DINITRATE (CAS No. 6423 13 1)... 

Free Glycerin Determine as directed under Free Glycerin or Propylene Glycol, Appendix VII. 

Assay (See Chromatography, Appendix BA.) Inject a 10-p,L portion of sample into a suitable gas chromatograph in which the detector is the thermal conductivity type and the column is 1-m x 8-mm (id) stainless steel tubing (Perkin Elmer Instruments, or equivalent) packed with 4% Carbowax compound 20 M on 40- to 60-mesh Chromosorb T, or equivalent materials. The carrier gas is helium flowing at 75 mL/ min. The injection port temperature is 240° the column temperature is 120° to 200°, programmed at a rate of 5°/min and the block temperature is 250°. Under the conditions described, the approximate retention time for Propylene Glycol is 5.7 min, and 8.2, 9.0, and 10.2 min for the three isomers of... 

Solvents are usually classified by the functional groups of the molecule. The most used classes are listed in Table 3.1 and in Appendix 2.1. Each solvent of a class has properties similar to other members of the class. Solvents transformed the ability of technology, and conservators, to manipulate materials. However, widespread use has been shown to have many deleterious side-effects such as toxicity, flammability, damage to water and air quality, effect on the ozone layer, cost, etc. New solvents are being introduced to reduce these effects, e.g. the use of siloxane-based fluids (Cull and Swanson, 2001) or propylene glycol-derived solvents replacing ethylene glycol-derived ones. 

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