About This Archive  | DCHAS-L 2013 Index   | DCHAS-L Yearly Index   | DCHAS-L Home Page
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] demolition of lab with osmium tetroxide contamination
Date: Mon, 5 Aug 2013 17:10:28 -0400
Author: ILPI Support 		Next by Date:
Subject: Re: [DCHAS-L] demolition of lab with osmium tetroxide contamination
Date: Mon, 5 Aug 2013 17:41:13 -0700
Author: Laurence Doemeny

(Note: This post is 12 years old and may contain outdated information.)

From: Monona Rossol <actsnyc**At_Symbol_Here**cs.com>
Subject: Re: [DCHAS-L] demolition of lab with osmium tetroxide contamination
Date: Mon, 5 Aug 2013 18:37:17 -0400
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 8D0604378CED8F5-91C-2E5BF**At_Symbol_Here**webmail-d214.sysops.aol.com
In-Reply-To <3C2BD305-E3B1-4BC1-BE7A-087348E8338F**At_Symbol_Here**ilpi.com>


I agree with Rob.  Osmium tetroxide  has a TLV TWA of 0.0002 ppm or 0.0016 mg/m3.   You have no choice but to use air-supplied. And I just looked at 3M cartridge information and Supplied Air is their recommendation.   And since OS4 still a solid at room temperature (MP 104 F  - 40 o C) there really could be stuff lurking there depending on conditions.
Monona Rossol, M.S., M.F.A., Industrial Hygienist
President:  Arts, Crafts & Theater Safety, Inc.
Safety Officer: Local USA829, IATSE
181 Thompson St., #23
New York, NY 10012     212-777-0062
actsnyc**At_Symbol_Here**cs.com   www.artscraftstheatersafety.org

 
-----Original Message-----
From: ILPI Support <info**At_Symbol_Here**ILPI.COM>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Sent: Mon, Aug 5, 2013 5:20 pm
Subject: Re: [DCHAS-L] demolition of lab with osmium tetroxide contamination

Not an expert at that, but for the hood I'd go with a full face supplied air respirator.  While it's unlikely there is anything volatile remaining, OsO4 attacks the corneas and I would not rely on a cartridge which probably has not been tested against Os4.

Rob Toreki

  ======================================================
Safety Emporium - Lab & Safety Supplies featuring brand names
you know and trust.  Visit us at http://www.SafetyEmporium.com
esales**At_Symbol_Here**safetyemporium.com  or toll-free: (866) 326-5412
Fax: (856) 553-6154, PO Box 1003, Blackwood, NJ 08012

On Aug 5, 2013, at 3:29 PM, Ellen M. Sweet <ems325**At_Symbol_Here**CORNELL.EDU> wrote:

Hi everyone,
I'd like to know if anyone has dealt with the demolition of a lab and removal of a fume hood in which osmium tetroxide was used? Other than recommending respiratory protection (N100 or P100 cartridges), nitrile gloves and coveralls during tear-out, are there any other precautions we should keep in mind?
Thanks for any suggestions.
Ellen
 
Ellen Sweet
Laboratory Ventilation Specialist
Department of Environmental Health and Safety
Cornell University
315-730-8896
 

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.