Stages in the Lifetime of a Process

Four stages can be identified in the lifetime of a process . These are  

Literature search for Influence of plant hazards data on hazards 

Re-evaluation of Check effect on chemical chemical hazards 

To ensure safety at the laboratoiy scale it is usually sufficient for a responsible chemist to ensure that the materials being handled will not detonate or deflagrate and that the process does not involve a violently exothermic reaction. However, a more detailed evaluation of the potential chemical reaction hazards is often valuable at this stage to aid in route selection and process development. 

It is often difficult to identify hazardous reactions without experimental testing, so the scale of experiments and equipment used at this stage should be such that a potential runaway can be contained within a fume cupboard. 

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