From: MN Cooper <00000313ede34dce-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Old Bleach
Date: Mon, 25 Oct 2021 16:12:26 -0600
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: 2F131E69-E2FE-4CCC-B274-C09539EBC2F3**At_Symbol_Here**yahoo.com
In-Reply-To


Bleach does slowly degrade with time. However, if you are looking to disinfect with a concentration around 50ppm +/- you should be fine. You could analyse a sample to be sure. 

V/r, 
Mike

Michael N. Cooper MS, MPH, CIH
Certified Industrial Hygienist
Radiation Protection Technologist
mcooperconsulting**At_Symbol_Here**yahoo.com


Adjunct Professor
Department of Community and Environmental Health
School of Allied Health Sciences,
College of Health Sciences 
Boise State University 
michaelcooper961**At_Symbol_Here**boisestate.edu
(408) 313-2127


On Oct 25, 2021, at 15:50, Margaret Rakas <mrakas**At_Symbol_Here**smith.edu> wrote:

If it isn't Clorox (or another brand with an EPA registration #) it is not suitable for disinfection of infectious agents. An EPA registration number is required for all disinfectants. 

If it is Clorox (or another company has registered theirs w EPA during the pandemic) then I would find the lot # on the bottle and call the company.  They can tell you if it has expired as a disinfectant.
Good luck w this!
Margaret

Sent from my iPhone

On Oct 25, 2021, at 5:45 PM, Patricia Leach <Patricia.Leach**At_Symbol_Here**tamuc.edu> wrote:

=EF=BB=BF

Hello,

I was wondering about using old stocks of bleach for disinfecting in bio labs. The bleach is about 2 years old and has never been opened. I am not sure if it is industrial or commercially available bleach. Any advice would be appreciated.

 

Patricia Leach

Environmental Health and Safety Coordinator

Emergency Management and Safety

Texas A&M University - Commerce

P: 903.468.3278

C: 316.644.8255

 

Mail: P.O. Box 3011, Commerce, TX 75429

 

 

 

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