Expanded Chemical Reactivity Worksheet (CRW4) for determining chemical compatibility, past, present, and future

Abstract

Chemical compatibility is a key consideration throughout the chemical industry wherever two or more chemicals have the potential to mix, either inadvertently or by design. One of the most comprehensive tools available for determining chemical compatibility, the NOAA Chemical Reactivity Worksheet (CRW), has gained significant traction since the release of the third version (CRW3) in 2012. In 3 years, this free software has been downloaded >200,000 times and has become the chemical compatibility tool of choice at many organizations. As a result of an ongoing partnership between the National Oceanic and Atmospheric Administration (NOAA), The Dow Chemical Company, The Center for Chemical Process Safety (CCPS), Materials Technology Institute (MTI) and other industrial/academic/government volunteers, a fourth version of the CRW (CRW4) has been developed. The expanded capabilities of this new version include a materials of construction section, improved import/exporting/data sharing capabilities, additional reactive groups to aid in determining compatibility decisions, several user interface enhancements, along with the correction of minor issues found in the CRW3. This article will describe past development, the new features included in the CRW4, followed by a brief discussion of future development plans for the software tool. Such developments should solidify this tool's position as the gold standard within the chemical industry for determining chemical hazards. © 2016 American Institute of Chemical Engineers Process Saf Prog 36: 24–29, 2017

Thermal risk classification optimization of flammable aromatic nitro compounds: Experiments and QSPR models

“…In addition, the current international classification standards for hazardous chemicals mainly follow the following six categories: “Recommendations on the transport of dangerous goods” ( UN TDG ), “Globally harmonized system of classification and labeling for chemicals” ( GHS ), “the NFPA 704 standard of the American Fire Protection Association,” “the evaluation standard of chemical thermodynamics and energy release,” “the code for safety risk assessment of fine chemical reaction” and “the original thermal risk matrix” ( ORM ). Thus the results of risk assessment mostly rely on a single evaluation parameter, and therefore, it is difficult to comprehensively evaluate the probability of thermal risk 24 . At present, there are no special classification standards for thermal hazards and nitro compounds with strong self‐reaction characteristics.…”

“…Thus the results of risk assessment mostly rely on a single evaluation parameter, and therefore, it is difficult to comprehensively evaluate the probability of thermal risk. 24 At present, there are no special classification standards for thermal hazards and nitro compounds with strong self-reaction characteristics.…”