There are many new products and tools since the first edition was published in 1995. This includes predicting hazards using thermodynamic calculations, Chemical Reactivity Worksheet(CRW), CHETAH, CAMEO etc. new calorimetry screening methods are now available. New topics may include safe operating limit and storage condition assessments. Several case studies are now available and will be added. We are looking for R&D professionals, process development & reaction safety experts along with engineers & designers with chemical reactivity expertise.