UK Technical Process Safety Forum (formally UK Chemical Reaction Hazards Forum)
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The Incident

Two containers of acetic acid got hot and developed pressure. One of these burst and spread its contents onto the laboratory floor.

The Investigation

The acetic acid was recovered material from a reaction that had used acetic anhydride


Lessons Learnt

The reaction between water and acetic anhydride can be rather slow, but once it gets underway, then a rapid temperature (& pressure) can develop.

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