About This Archive  | DCHAS-L 2016 Index   | DCHAS-L Yearly Index
person wearing a disposable face shield and surgical style mask

Check out Safety Emporium for your N95, N99, and face shield needs.

Previous by Date:
Subject: Re: [DCHAS-L] Liquid Nitrogen Ice Cream
Date: Friday, September 23, 2016 at 8:04:46 AM
Author: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**keene.edu> 		Next by Date:
Subject: Re: [DCHAS-L] Liquid Nitrogen Ice Cream
Date: Fri, 23 Sep 2016 14:04:07 +0000
Author: DAVID Katz

From: "Reinhardt, Peter" <peter.reinhardt**At_Symbol_Here**YALE.EDU>
Subject: Re: [DCHAS-L] Liquid Nitrogen Ice Cream
Date: Fri, 23 Sep 2016 13:08:16 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: BN3PR0801MB2323B19477CE104087521DF492C80**At_Symbol_Here**BN3PR0801MB2323.namprd08.prod.outlook.com
In-Reply-To


A review of this practice, Yale's Chemical Safety Committee has concluded that only food-grade liquid nitrogen should be used for this. Food-grade liquid nitrogen is more expensive and is supplied only in larger quantities (150 liters). Food-grade liquid nitrogen must meet more rigorous tolerances for purity. We found only one instance for which this was purchased, so we are in a quandary policy-wise.

 

We also found that most transfer dewars have debris and other contaminate in them. These can easily end up in the ice cream.

 

Although we are concerned about purity and contamination, we have not found an instance where this has caused an illness, but we believe the risk exists.

 

Safety seems to take the fun out of everything. It's what we do.

 

Pete

 

Peter A. Reinhardt

Director, Office of Environmental Health & Safety

Yale University

135 College St., Suite 100

New Haven, CT   06510-2411

(203) 737-2123

peter.reinhardt@yale.edu

 

From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L@PRINCETON.EDU] On Behalf Of Melissa Anderson
Sent: Thursday, September 22, 2016 4:30 PM
To: DCHAS-L@PRINCETON.EDU
Subject: [DCHAS-L] Liquid Nitrogen Ice Cream

 

I have a colleague who's interested in making liquid nitrogen ice cream as an outreach activity and he asked me about safety/risk implications. Does anyone have any experience with this from a risk assessment perspective?

 

Thanks!

Melissa Anderson

Chemistry Instructor

Pasadena City College

--- This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety. For more information about the list, contact the Divisional secretary at secretary@dchas.org

Previous post   |  Top of Page   |   Next post


The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.