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Subject: Re: [DCHAS-L] Beryllium research- engineering controls

Date: May 7, 2023 16:28 UTC

Author: Jonathan Klane <jklane1**At_Symbol_Here**ASU.EDU>

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Subject: Re: [DCHAS-L] Hazardous Fluoride Chemicals

Date: May 8, 2023 21:08 UTC

Author: Mark Ellison <mellison**At_Symbol_Here**QUALA.US.COM>

From: Jonathan Dannatt <jdannatt**At_Symbol_Here**UDALLAS.EDU>

Subject: Re: [DCHAS-L] Hazardous Fluoride Chemicals

Date: May 8, 2023 21:01 UTC

Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>

Message-ID: <CAEiU9vBbX36EQO80G9obTWSZym9eQ1wDt1irK3ODrhw8h+S5xA**At_Symbol_Here**mail.gmail.com>

In-Reply-To: <PH8PR08MB8530605718F4381B725320C6F1729**At_Symbol_Here**PH8PR08MB8530.namprd08.prod.outlook.com>

Demystify: 
Hey Paul, 

I don't have a direct answer for your question, but I have some experience to add to the conversation. 

1) You should add potassium bifluoride (KHF2) to your list. I've personally used it and it definitely etches glass. Although for my chemistry that was okay, I just kept a set of etched glass for when I needed to use this reagent.  
2) I've used boron trifluoride quite extensively and have never witnessed it etching glass. Not that this isn't theoretically possible, but I suspect it would be quite difficult since the B-F bond is so strong. Note, that isn't to say that this is an innocuous chemical...it's not. 
3) Finally, I'll add that in the SDS provided by sigma, almost all fluoride salts say something along the lines of "In case of skin: First treatment with calcium gluconate paste..." My sense is that many of these statements were copy and pasted at one point to all the fluoride salts without actual experimental evidence. 

Hope this helps : ) And I'll be following for further discussion. 

Best, 
Jonathan

On Mon, May 8, 2023 at 3:16 PM Emery, Paul <paul.emery**At_Symbol_Here**yale.edu> wrote:

Good afternoon DCHAS,

 

It came to my attention recently that hydrofluoric acid isn’t the only chemical requiring treatment with calcium gluconate gel and segregation from glass. A brief conversation with a cleanroom friend confirmed a few I found online, but does anyone else have any chemicals, mixtures, or resources for identifying chemicals with comparable hazards as hydrofluoric acid?

 

Below I’ve listed the names of the chemicals with SDS references to HF burns, use of calcium gluconate gel, and/or that they react with glass. Any additional insight, input, or suggestions would be greatly appreciated.

 

Sulfur Hexafluoride

Ammonium Bifluoride

Ammonium Fluoride

Boron Trifluoride

Buffered oxide etchant (BOE)

Diethlyamino sulfur trifluoride (DAST)

HF-Pyridine Complex

Hydrofluoric Acid (HF)

Knolls Reagent

Lithium hexafluorophosphate

Sodium Fluoride

Sulfur tetrafluoride

Tetrafluoroboronic Acid

Xenon Difluoride

 

 

(My first request to DCHAS)

 

Best,

-P

 

Paul R. Emery, MSc

Safety Advisor

 

Yale Environmental Health and Safety

135 College Street, Suite 100

New Haven, CT 06510

Phone (203) 737-3521

Mobile (475) 261-6163

Email paul.emery**At_Symbol_Here**yale.edu

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--


Jonathan Dannatt, Ph.D.

Assistant Professor

Department of Chemistry

University of Dallas

O: (972) 721-5065

E: jdannatt**At_Symbol_Here**udallas.edu

W: Website, Linkedin

 

 

 

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