Analysis of Hydraulic Fluids and Lubricating Oils for the Formation of Trimethylolpropane Phosphate (TMP-P)
Final rept. 1985-1987
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Pagination or Media Count:
Twenty-six different oils, hydraulic fluids and lubricants in U.S. Navy inventory were screened for yield of the neurotoxin Trimethylolpropane phosphate TMP-P in order to obtain an estimate of safety hazard potential. A commercially available synthetic aircraft engine oil Exxon 2380 with a demonstrated yield of TMP-P was studied to establish the optimal temperature and pyrolysis time conditions for TMP-P production. Results of the analysis indicate that in the Exxon 2380 synthetic oil, TMP-P is formed very rapidly within 5 minutes with formation beginning in a temperature range of 350 to 400 C. The yield of TMP-P increases as a function of temperature and achieves a maximum yield at 450 - 500 C. Above this temperature, the TMP-P yield decreases rapidly to zero at 600 C probably due to thermal decomposition. Only one of the twenty- six oils from the U.S. Navy inventory gave evidence of TMP-P formation. The maximum TMP-P yield of oil MIL-L-23699C was only 1.9 120 ugg of the maximum yield 6241 ugg for the Exxon 2380 synthetic engine oil. Results obtained in the Naval Submarine Medical Research Laboratory NSMRL study for Exxon 2380 have been found to be in good agreement with results obtained at National Transportation Safety Board and University of Colorado. Results reported from these three laboratories have been applied to an assessment of the hazard potential of pyrolyzed oils and lubricants assayed in this study.
- Lubricants and Hydraulic Fluids
- Environmental Health and Safety