From:
Jack Reidy <jreidy2**At_Symbol_Here**STANFORD.EDU>
Subject:
Re: [DCHAS-L] Hazardous Fluoride Chemicals
Date:
May 9, 2023 15:24 UTC
Reply-To:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID:
<BYAPR02MB5686FAE485C38767DA0196588C769**At_Symbol_Here**BYAPR02MB5686.namprd02.prod.outlook.com>
In-Reply-To:
<CACKCnAf=Xtd3UG42OFWWBpMNnJgsPU49=cizO65vGt5aF_C9Ww**At_Symbol_Here**mail.gmail.com>
Hi all,
My understanding is that generally speaking, calcium gluconate is useful for exposures to compounds that create accessible fluoride ions. So for example, I wouldn’t be very concerned about sulfur hexafluoride because I believe those bonds
are quite stable. This makes things like sodium fluoride tricky because it comes down to the specific situation and individual/institutional risk tolerance.
Sincerely,
Jack Reidy (he/him)
Research Safety Specialist, Assistant Chemical Hygiene Officer
Environmental Health & Safety
Stanford University
484 Oak Road, Stanford, CA, 94305
Tel: (650) 497-7614
I acknowledge that the land on which I live and work is the ancestral and unceded land of the
Muwekma Ohlone Tribe. As an uninvited guest on these lands, I am a beneficiary of the ongoing displacement of the Ohlone people. I pay my respects to the Native peoples, past and present.
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Mark Ellison
Sent: Monday, May 8, 2023 2:09 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] Hazardous Fluoride Chemicals
Off the top of my head, fluorosilicic acid, hypofluorous acid, and fluoroacetic acid.
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.
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Sulfur Hexafluoride
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Ammonium Bifluoride
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Ammonium Fluoride
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Boron Trifluoride
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Buffered oxide etchant (BOE)
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Diethlyamino sulfur trifluoride (DAST)
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HF-Pyridine Complex
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Hydrofluoric Acid (HF)
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Knolls Reagent
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Lithium hexafluorophosphate
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Sodium Fluoride
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Sulfur tetrafluoride
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Tetrafluoroboronic Acid
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Xenon Difluoride
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(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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