Identifying criteria to classify chemical mixtures as 'highly hazardous' due to chemical reactivity

摘要

This paper uses 13 sets of calorimeter data to evaluate a number of common criteria to characterize chemical reactive hazards. The purpose is to "brainstorm" whether a criterion or set of criteria can be used to trigger PSM or RMP requirements for reactive chemicals. Such a criterion must be cost-effective, easy to use, and, ideally, should not rely on additional experimental testing. A total of 12 criteria were considered in this work: NFPA instability rating, experimental heat of reaction, experimental total heat release, instantaneous power density (IPD), reaction onset temperature, total change in temperature, total change in pressure, maximum temperature rate, maximum pressure rate, CHETAH predicted energy, and the Melhem Index (based on the calculated heat of reaction at the equilibrium state, and the computed adiabatic reaction temperature (CART)). Screening values, mostly selected arbitrarily, were assigned to the criteria.