As far as their chemical properties are concerned, the hydrocarbons are inert, except when in an oxidising atmosphere, which is capable of supporting combustion. In this case, self contained breathing apparatus is required. Mechanism of Action. Hydrocarbon fumes are preferentially absorbed into lipid rich tissue, for instance, the central nervous system. The exact dangerous concentrations depend on the volatility of the hydrocarbons in question, and on their aromatic content.
Swallowed fuels produce unconsciousness, and permanent brain damage has been reported.
Aspiration pneumonia may follow as a complication. Signs and Symptoms. Less severe exposures may cause dizziness, headache, nausea, vomiting and muscular incoordination. Acute emotional disturbances following hydrocarbon poisoning have been reported. Lead poisoning from tetraethyl lead additives is very rare except among those who manufacture blended fuels.