peter that one did ring a bell and after having a quick google for the COSH sheet its one of the hardeners that will go bang if you don't do it by the book with storage and vapour.
Its also heavier than air so don't store it down stairs in a basement.
I might seem anal about this stuff but very early on after starting work the company I worked for didin't really control storage or for that matter had a clue what they had on the shop floor and there was a fatal accident.