title: Evaluation of shipboard formation of a neurotoxicant (trimethylolpropane phosphate) from thermal decomposition of synthetic aircraft engine lubricant.
abstract: MIL-L-23699 lubricants that are composed principally of trimethylolpropane triheptanoate (TMP) and tricresyl phosphate (TCP) have been shown to form a neurotoxicant, trimethylolpropane phosphate (TMPP), during pyrolysis and/or combustion. Mechanistically, TMPP is thought to irreversibly inhibit the GABA-mediated inhibitory response and thereby produce epileptiform clonic/tonic seizures with convulsions followed by death. Thermal decomposition of MIL-L-23699 lubricant produces TMPP under laboratory conditions, but this product has not been detected in the workplace following actual fires. This study has examined whether TMPP is produced during an actual shipboard fire by placing the synthetic lubricant in a fire environment aboard the ex-U.S.S. Shadwell, Mobile, Alabama. Both biological and chemical analyses were performed on the thermally decomposed lubricant to ensure detection of the neurotoxic material. Under the conditions of this study, the formation of TMPP during a shipboard fire was confirmed. The implications of this finding for safe management of post-fire cleanup are discussed.
authors.affiliation: Naval Medical Research Institute Detachment (Toxicology), Wright-Patterson Air Force Base, OH 45433-7903.
authors.forename: J
authors.initials: J
authors.lastname: Wyman
authors.forename: E
authors.initials: E
authors.lastname: Pitzer
authors.forename: F
authors.initials: F
authors.lastname: Williams
authors.forename: J
authors.initials: J
authors.lastname: Rivera
authors.forename: A
authors.initials: A
authors.lastname: Durkin
authors.forename: J
authors.initials: J
authors.lastname: Gehringer
authors.forename: P
authors.initials: P
authors.lastname: Servé
authors.forename: D
authors.initials: D
authors.lastname: von Minden
authors.forename: D
authors.initials: D
authors.lastname: Macys
mesh_terms: D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000138:chemical synthesis*; D006358:Hot Temperature; D008153:Lubrication; D008891:Military Science; D014481:United States
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; C065518:4-ethyl-1-phospha-2,6,7 trioxabicyclo(2.2.2)octane-1-oxide