I haven't heard of a case of pressurization, and the only theoretical routes I could think of would require fairly dramatic misuse that would cause issues regardless of container type. We have, however, had several chemical exposures (thankfully none serious) due to splashes, typically when a slippery item falls back into the bath. In addition to upgrading PPE, we've found that handling items using tongs (when practical) helps. I believe we also had a lab start using a shower rack sort of thing, like you'd use to hold soap and hang from a shower head, to hold items and then just lower it into the bath. Can't remember if any labs have used this, but something we also at least considered was using a colander/pasta strainer.

Sincerely,

Jack Reidy (he/him)

Research Safety Specialist

Environmental Health & Safety

Stanford University

484 Oak Road, Stanford, CA, 94305

Tel: (650) 497-7614

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Benjamin Chew
Sent: Monday, December 2, 2019 1:01 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] Acid and Base (glass wash) Bath Containers

If I remember, pressurization was not an issue, but a secondary spill container was required since drips were always an issue and just in case the primary ruptured