The thermal decomposition of toxic organic compounds is being investigated in a laboratory system dedicated to the non-flame mode/zone of the combustion process. The early phase of the study has focused on three compounds: pentachloronitro-benzene (a fungicide), chloroform (a ubiquitous industrial compound) and heptane. The results of the third compound, heptane, are preliminary to those sought for a mixture of two or more compounds such as chloroform, a toxic substance, and heptane, a combustion process fuel. The data of the report was collected during the period January - June 1985.