Note also that the Honeywell guide allows for the soaking with iced benzalkonium chloride (at 0.13%) as a first aid treatment. Benzalkonium chloride solutions are relatively easily obtained and fairly inexpensive.
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Ken Kretchman
Sent: Friday, October 13, 2017 12:09 PM
Subject: Re: [DCHAS-L] HF concentration and gluconate gel
What Ralph states is quite correct.
A number of years ago we started having Student Health pharmacy prepare this.for distribution
at significantly reduced cost. That practice is discontinued for other reasons..
We also have had our fire / medical response group (EMTs) carry it with them since we
cant be sure that all needing the material have it in their possesion.
Ken Kretchman, CIH, CSP Director, Environmental Health and Safety
NC State University / Box 8007 / 2620 Wolf Village Way / Raleigh North Carolina 27695-8007
Email: Ken_Kretchman**At_Symbol_Here**ncsu.edu / Phone: (919).515.6860 / Fax: (919).515.6307
On Fri, Oct 13, 2017 at 12:08 PM, Stuart, Ralph <Ralph.Stuart**At_Symbol_Here**keene.edu> wrote:
> >So my recommendation would be that whatever concentration HF you work with, having calcium gluconate gel available as a first aid measure would be a very good idea.
The challenge I have found with this strategy is maintaining a useful stock on hand requires rotating the gel on a regular basis (annually? I think). The expiration dates are very difficult to track accurately from outside the lab where the HF is being used and should be the responsibility of the lab using the material. Then there's the expense of replacing the gel. Many people interested in using HF look at the catalog price of the solution they want to buy and assume that's the total cost. It's not...
Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
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