From: Dan Nowlan <dnowlan**At_Symbol_Here**BERRYMANPRODUCTS.COM>
Subject: [DCHAS-L] acute toxicity estimates (ATEs) for methanol
Date: Mon, 22 Jan 2018 16:32:32 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 96B01B2E9C84674ABE1BA48CDA3391030336100329**At_Symbol_Here**BPMAIL.bpi.local

I am in need of human acute toxicity estimates (ATEs) for neat methanol in order to calculate/derive the "numerical measures of toxicity" for several of our SDSs.  Irrelevant rodent LD50/LC50 abound, but I cannot find a consensus for human ATEs.  Can someone kindly point me in the direction of an authoritative source for this information (preferably with a concise synopsis so I don't have to sift through a dissertation-length publication)?  Among other regulatory bodies, the source(s) will need to please OSHA and DOT.  Thanks in advance.


Best regards,


Dan Nowlan

Chemist, R&D

Berryman Products, Inc.

(817) 640-2376, ext. 147


From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Jeffrey Lewin
Sent: Friday, January 19, 2018 4:12 PM
Subject: Re: [DCHAS-L] Liquid nitrogen storage


Just some quick thoughts you should consider:


Are they storing in fixed tanks, portable liquid cylinders, or dewars?


How big are they?


How big is the room?


Are they dispensing or using for cold storage?


Have you done back of the envelope calculations to determine the concentration during a catastrophic release?  For a small spill?


I've been working with one lab being fed with a 1500 gallon tank (tank is outside) for cooling then vented back outside and the vendor recommended that we install an O2 sensor.  


I'm also aware of a smallish electron microscope lab that uses 100-gallon cylinders that, after doing spill calculations, also had a sensor installed.  


We did spec sensors into our new Chemistry Stores addition in the LN dispensing room.


The biology labs with 20L dewars being used for cold storage typically don't.








On Fri, Jan 19, 2018 at 3:48 PM Battles, Paul <pmb024**At_Symbol_Here**> wrote:

Hello All,


We are in the process of building a new biology building and one of the labs will regularly contain a liquid nitrogen tank. Are oxygen depletion sensors required? The only thing I have come across said "recommended if room doesn't have adequate ventilation."



Paul Battles


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Jeff Lewin

Chemical Safety Officer

Compliance, Integrity, and Safety

Environmental Health and Safety

Michigan Technological University

Houghton, MI 49931


O 906-487.3153

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