This study evaluates the influence of the contamination of various metal compounds on a runaway reaction hazard of aqueous hydrogen peroxide. The test apparatus was assembled on an experimental basis. Especially, to avoid any catalytic effects, we used a glass vessel. Within the experiments conducted, iron, copper, chlorine ions accelerated the runaway reaction. However, nickel, potassium, sulfate and nitrate ions showed inert. In the case of iron and copper, there is a linear correlation between the reciprocal of additive's concentration and the logarithm of times to maximum temperature like Arrhenius equation, although the reason cannot be explained at the present. The important factors affected on the runaway reaction should be multivalency. The reactivity difference in several metal compounds is well explained from the factor. (c) 2008 Elsevier Ltd. All rights reserved.