http://www.ksl.com/?sid=34263740&nid=148&title=u-chemistry-building-evacuated-after-small-explosion&s_cid=queue-19

The take-home message from them:

Overall, he said, the safety measures that were in place did what they were designed to do.

"The cabinet did its job," he said. "It's proof that those safety measures work."

I would like to seen their  after action investigation report.

Their engineering controls did appear to work.  But-

"An ounce of prevention is worth a pound of cure."

                                             Benjamin Franklin

I wonder about their administrative controls in place =E2=80" especially their chemical storage and inventory program. 

I might speculate a chemical storage issue: incompatibility and/or chemical expiration issue. 

If this was the root cause, it would have been preventable.