From: "Nail, John" <jnail**At_Symbol_Here**OKCU.EDU>
Subject: Re: [DCHAS-L] Gas cylinder storage in chemical fume hoods
Date: December 6, 2012 9:57:21 AM EST
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <4CB9A51AE5B8C44BA13375C794CBA29AD0D823A857**At_Symbol_Here**>

I’ve used one pound (gas weight) containers of arsine and phosphine in a synthesis research lab. As I recall, these containers were about 10 liters in overall volume and fit nicely in a fume hood.


In regards to the argument that ‘there should be dedicated gas storage hoods whenever toxic gases such as arsine and phosphine are used’, this isn’t practical for university research labs in which the toxic gas may only be used for a relatively short period of time. Putting the small (but larger than a lecture bottle) in the hood makes much more sense that having it outside of the hood. The arsine and phosphine were always transferred using Schlenk line techniques.


John Nail

Professor of Chemistry

Oklahoma City University


From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Yung Morgan
Sent: Wednesday, December 05, 2012 2:28 PM
Subject: [DCHAS-L] Gas cylinder storage in chemical fume hoods


Dear members,


Please excuse me if these questions about cylinders storage in laboratories hoods  had been circulating with this group before.


1.       Have you been able to use gas cylinders larger than lecture bottle size inside a chemical fume hood?. 

2.       If  larger gas cylinders in chemical fume hoods are used, how exactly have they been used? 

3.        If you have not used larger gas cylinders in chemical fume hoods, is it only due to NFPA 45 or another reason? 


Any thoughts you have will be appreciated. Thank you  and  Happy Holidays season!


Best wishes,

Yung Morgan, MsPH
Laboratory Safety
Industrial Hygiene Services
Environmental Health and Safety
117 Draper hall
UMASS,Amherst MA 01003
phone (413)  545-2682
Fax  (413) 545-2600
email : pmorgan**At_Symbol_Here**


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