Previous by Date: Subject: Re: [DCHAS-L] Stockroom Security Date: Thursday, August 11, 2022 at 2:47:51 PM Author: Ralph Stuart <ralph**At_Symbol_Here**rstuartcih.org>
From: TILAK CHANDRA <0000058f112ac338-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Stabilized Piranha solution bottles degrading/failing
Date: Thu, 11 Aug 2022 18:48:39 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: SA1PR06MB7975150ADA32308C77C5334888649**At_Symbol_Here**SA1PR06MB7975.namprd06.prod.outlook.com
In-Reply-To <59672902.282046.1660241403394**At_Symbol_Here**mail.yahoo.com>
Demystify:
Whenever possible, avoid storing piranha! Piranha is not effective after storage, and it slowly decomposes to form gases that will pressurize the container. Mix a small amount of fresh solution
for each application and neutralize safely after use. My two
cents.
Tilak Chandra
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> on behalf of Jessica Snyder <000017108be2532d-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> Sent: Thursday, August 11, 2022 1:10 PM To: DCHAS-L**At_Symbol_Here**Princeton.EDU <DCHAS-L**At_Symbol_Here**Princeton.EDU> Subject: [DCHAS-L] Stabilized Piranha solution bottles degrading/failing
Hello All,
I work at University of Maryland, and we just had a spill in a lab from Nano-Strip, a commercially prepared stabilized version of piranha solution. It degraded the manufacturer's bottle to the point of failure, resulting in a large and obviously hazardous spill.
Apparently, the manufacturer had an expiration date of around 6 months because of the degradation. In case anyone else might have old bottles of this stuff lying around, I thought it would be good to drop a note to the group.
I haven't seen Nano-Strip readily purchasable in the US for years, but I know Sigma Aldrich has their own version, Pure Strip. Has anyone here worked with it? I am wondering if they also come in HDPE bottles prone to degradation.
Thanks,
Jessica Snyder
Industrial Hygienist
Laboratory Safety, University of Maryland
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