In this study, we examined the reaction hazard during the hydrosilylation reaction between trichlorosilane (TCS) and 1,6-divinyl(perfluorohexane) (FDV) in the presence of a butanol solution of chloroplatinic acid (Pt-Cat) as the catalyst. Assuming the three industrial risks of excessive addition of Pt-Cat, contamination by iron rust and mixing with cooling water, we observed the temperature and pressure change of TCS/FDV with an excessive amount of Pt-Cat, TCS/FDV/Pt-Cat with Fe(2)O(3) and TCS/FDV/Pt-Cat with distilled water, using an accelerating rate calorimeter (ARC). The temperature and pressure greatly increased, especially in the sample with Fe(2)O(3). For instance, in TCS/FDV/Pt-Cat with 1.5 wt.% Fe(2)O(3), the heat release rate exceeded 624 K min(-1) and the pressure rose above 25 MPa during the exothermic reaction. (C) 2011 Elsevier Ltd. All rights reserved.