From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] HF concentration and gluconate gel
Date: Fri, 13 Oct 2017 11:47:23 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 15f166b2b68-c0e-e5a1**At_Symbol_Here**webjas-vae136.srv.aolmail.net
In-Reply-To <01f401d34437$e601bd00$b2053700$**At_Symbol_Here**midwestchemsafety.com>


"First aid for a unique acid, HF: A sequel," Chemical Health & Safety, Eileen B. Segal, American Chemical Society, January/February 2000, pp. 18-23, has some advice down to 2%


62 FR 61928-61933, November 20, 1997 - revised 12/4/03, 12/14/11 has bits of information because the CPSC is proposing to require child resistant packaging for anything containing more than 0.5% of any elemental fluoride and they specifically mention rust removers and glass etching kits.

But I have nothing in my file about precautions at 0.1% HF.   I would, however, generally agree that having the stuff on hand and using that product as a training opportunity would be a good thing.



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: Harry Elston <helston**At_Symbol_Here**MIDWESTCHEMSAFETY.COM>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Fri, Oct 13, 2017 11:31 am
Subject: Re: [DCHAS-L] HF concentration and gluconate gel

Jeff,
 
I'm not a physician here, but here's my take:
 
  1. Regardless of concentration in-use, having it on hand provides for good first aid practices.
  2. How did the end-user get to "low concentration?"  Did they dilute a higher concentration solution?
  3. "Low concentration" tends to become "higher concentration" use over time because (nearly) every scientist believes "more is better".  My observation of scientist nature over time.  That circles the logic back to #1 above.
 
Honeywell's guide does give cutoff concentrations to define "dilute."
 
H
 
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Jeffrey Lewin
Sent: Friday, October 13, 2017 9:47 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] HF concentration and gluconate gel
 
I received a cold call for gluconate gel kits this morning that I sent on to departmental CHO's.  Someone asked if they should have kits available for low concentrations of HF (<0.1%).
 
Does anybody have a HF "cutoff" where they don't require/recommend kits be immediately available in the laboratory?
Jeff
 
--
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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