Vials Found with Bulging Lid due to Overpressurization
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Type:  Lessons Learned

Publisher:  Argonne National Laboratory, Argonne, IL

Date: 

Topics:  Chemical Safety, Laboratory

When using concentrated acids for cleaning metal residues, expect some gas production to occur, and plan the containment accordingly.

A guest graduate student was tasked with cleaning out residual metals after analysis. He placed the dirty cells in a glass jar and added concentrated HCl. He then placed the jar in the corrosives cabinet after tightening the cap and affixing electrical tape to the lid as an additional method of sealing against possible off gassing of the container. Approximately two hours later, a post doc entered the lab and noticed a strong acid smell, bubbling liquid in the jar, and a noticeable bulging of the jar lid.

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