From: Bruce Van Scoy <bvanscoy**At_Symbol_Here**TWC.COM>
Subject: Re: [DCHAS-L] Osmium Tetroxide
Date: Fri, 7 Sep 2018 20:05:02 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 009c01d44707$98e86fe0$cab94fa0$**At_Symbol_Here**

Dr. Cogswell,

I would suggest reviewing the ACGIH Documentation of the TLVs for Osmium Tetroxide which reviews the data from which its TLV or BEI is derived instead of relying upon simply reviewing other college/university information.  I’m going from memory hear only, but I thought that while the chemical properties of osmium tetroxide need respected, the real hazard came from occupational exposure.  I try to focus on peer reviewed or government peer reviewed sources, e.g., OSHA, EPA.  Colleges/universities are better sources than simply the internet, but they are not peer reviewed, nor citable in an affirmative defense.  We have several J.D.’s on the list, please let me know if I am wrong, I’m always looking to learn.




From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Jeffrey R. Cogswell
Sent: Thursday, September 6, 2018 3:34 PM
Subject: [DCHAS-L] Osmium Tetroxide



I’m currently working on Chemical SOPs.

While working on Osmium Tetroxide I’ve been looking at other SOP’s from other Colleges/Universities and many say it is a strong oxidizer. Which makes sense but when you look at the SDS sheets and in particular the GHS for this chemical; oxidizer isn’t listed as a hazard. I’m looking at it in a solution and by itself (100%) and still no oxidizer warning.

Any guidance would be greatly appreciated.



Jeffrey R. Cogswell, Ph.D.

Chemical Inventory and Laboratory Resource Center Technician, EHS

37 Dewey Field Road, HB 6216

Hanover, New Hampshire 03755

P: 603.359.0128  F: 603.646.2622


--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here** Follow us on Twitter **At_Symbol_Here**acsdchas

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
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.