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Subject: [DCHAS-L] NYCOSH session open to us
Date: December 1, 2012 10:05:14 AM EST
Author: ACTSNYC**At_Symbol_Here**CS.COM 		Next by Date:
Subject: [DCHAS-L] Eating and Drinking in Laboratories
Date: December 1, 2012 3:15:31 PM EST
Author: Miriam Weil

From: Karen Salazar <kls_1**At_Symbol_Here**COX.NET>
Subject: Re: [DCHAS-L] Need a consulting organic chemist on safety issue
Date: December 1, 2012 10:23:44 AM EST
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <2a160.26f6bc1c.3deb6cc6**At_Symbol_Here**cs.com>


Monona, 


If they are planning to disinfect first then heat, they might be asking for more trouble.  The heat breaks down the disinfectants into corrosive chemicals.  Here is an article about bromine:

http://www.ncbi.nlm.nih.gov/pubmed/9118727

However, since the chemistry of disinfection is the same with chlorine, I am assuming heating would generate chlorine and hydrochloric acid with a chlorine based disinfectant.

Recommendations for hot tub water is that it not exceed 104 =CB=9AF.  First because it could burn bathers, but also, because the heat starts to break down the disinfectants at this temp.

I understand that the water will be at room temp when all of this takes place, but if they take the water up to 140 =CB=9AF in the presence of disinfectants, then pump it back into the "pool," the damage will have been done.

Karen


On Dec 1, 2012, at 8:23 AM, ACTSNYC**At_Symbol_Here**CS.COM wrote:

I'm adding that to a list of suggestions.  I'm going to prepare for them information gleaned from these WONDERFUL e-mails.  And also the information about why chlorine and bromine are not likely to work.

Now here's the NEW QUESTION:  They are now planning to pump the 1500 gallons into he liquid for storage between shows into (6) 275 gal tanks.  They are working on finding a heater that would rotate between the tanks and bring the stuff up to 140 o F each for a period of time.

Assuming they can "pasturize" the stuff, now we really need that chemist to look at the reactions of this soup at 90 ' F for the hours of the show and 140 o F periodically during storage.  I can help with the dyes, but the the rest is a mystery.

Monona
..

In a message dated 11/30/2012 5:27:02 PM Eastern Standard Time, dmdecker**At_Symbol_Here**UCDAVIS.EDU writes:

Always astonishing what our dear theatre folks have in mind ....

Tagging off Kim's suggestion ....  Rather than water, could they use strips or pieces of fabric that would give the illusion of a liquid?  A tub (puddle?) full of fabric "confetti, " if you will, dyed to look like blood, might work.  It wouldn't stick to the performers but it might be close enough.

Just a thought ....

Debbie

Debbie M. Decker, CCHO
Campus Chemical Safety Officer
Environmental Health and Safety
University of California, Davis


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