Chemical Safety

While working in a UC Berkeley laboratory, a graduate student discovered the presence of an old experimental set-up, which was labeled as containing a small amount of hydrazoic acid, in a shared cold room with no responsible contact person. This material is a potentially explosive chemical under certain circumstances, so the student referred the set-up to the Department Safety Coordinator (DSC). The DSC requested the assistance of EH&S who recommended that the set-up be disposed of by an explosives material contractor because very little was known about the source...

A graduate student in a UC Berkeley laboratory discovered the aftermath of a chemical explosion upon arrival at the laboratory he shares with other graduate students. The extensive contamination was caused by the explosive rupture of a plastic bottle of liquid waste kept inside the hood. According to the container label, one of the components inside the ruptured bottle was hydrofluoric acid. The investigation revealed that an incompatible material may have been poured into the same container causing the reaction and resulting explosion. The hood, floor and walls near...