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Previous by Date: Subject: Re: [DCHAS-L] delayed acid burn Date: Thursday, November 7, 2019 at 9:06:06 AM Author: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> |
Next by Date: Subject: Re: [DCHAS-L] delayed acid burn Date: Thu, 7 Nov 2019 15:11:55 +0000 Author: Monona Rossol |
This article might be helpful on determining what else could have been in the water.
Formation of Iodinated Disinfection Byproducts (I-DBPs) in Drinking Water: Emerging Concerns and Current Issues
Huiyu DongZhimin QiangSusan D. Richardson*
Acc. Chem. Res. 2019, 52, 4, 896-905
Publication Date: March 28, 2019
https://doi.org/10.1021/acs.accounts.8b00641
Copyright © 2019 American Chemical Society
Thank you,
Yaritza Brinker
260.827.5402
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
On Behalf Of Yaritza Brinker
Sent: Wednesday, November 6, 2019 7:43 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] delayed acid burn
** External Email **
Thinking about this a bit more, the location of the burn could be consistent with removing your gloves. I have seen plenty of people pinch their glove on the small side of their wrist, right above the location of the burn. Depending on
how the student pinched the glove, it is plausible the student could have touched that location with their contaminated glove. A proper technique can be executed poorly when tired/distracted or if wearing the incorrect size glove.
Another thing to consider is iodoacetic acid is described as a white powder in the literature. Was the student wearing gloves while weighing the powder? Many people think you don't need to wear gloves when weighing solids.
Thank you,
Yaritza Brinker
260.827.5402
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
On Behalf Of Yaritza Brinker
Sent: Wednesday, November 6, 2019 1:16 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] delayed acid burn
** External Email **
In my experience, concentrated sulfuric will give you a stinging sensation followed by itching within seconds of exposure. If you don't do a good job at decontaminating your skin, then you can have a delayed sensation. However, it will
be within the hour.
I don't have experience with iodoacetic, but the CAMEO database
https://cameochemicals.noaa.gov/chemical/20524 saysÉ
Health Hazard
SYMPTOMS: Exposure to this compound may cause irritation of the skin, eyes and mucous membranes and may lead to contact dermatitis or severe burns.
ACUTE/CHRONIC HAZARDS: This material is capable of causing severe burns. (NTP, 1992)
SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison
control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
So, there may be a delay with this chemical.
Thank you,
Yaritza Brinker
260.827.5402
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
On Behalf Of Jeffrey Lewin
Sent: Wednesday, November 6, 2019 12:20 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] delayed acid burn
** External Email **
I'm not an IH specialist, but looking at the SDS's for the acids, if the student got some sulfuric acid on the back of their glove and didn't realize it (nitrile break through is 30 minutes), it seems plausible it soaked through and cause
a burn. Of course, if the glove had been compromised and leaked in through a break, the glove would just hold it against their skin.
One also wonders if there was acid used/spilled outside the area they were expecting it and managed to contaminate themselves when they were not wearing any gloves.
Jeff
From Sigma's SDS (Sulfuric acid):
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.2 mm
Break through time: 30 min
Material tested:Dermatril¨ P (KCL 743 / Aldrich Z677388, Size M)
From Sigma's SDS (Iodic Acid):
Full contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril¨ (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril¨ (KCL 740 / Aldrich Z677272, Size M)
On Wed, Nov 6, 2019 at 12:04 PM Wiediger, Susan <swiedig**At_Symbol_Here**siue.edu> wrote:
Howdy folks,
Asking this question on behalf of a colleague from another university (so if there are follow-up questions, there may be a communications delay in answering them):
What kinds of delayed reactions are known for iodoacetic or concentrated sulfuric acid?
Here's the background:
A graduate student was working with concentrated sulfuric acid to acidify wastewater (wastewater treatment plant effluent) samples, and spiking them with iodoacetic acid (small quantities, since it was a spike). An experienced student, who had done this before , she was wearing nitrile gloves (the typical disposable type). To the best of her knowledge, she had no skin contact with the chemicals she was using and used proper glove removal technique.
Approximately a day or so later, she noticed a blistered looking patch on the back of her hand, near the joint of the thumb and first finger bones - about the size of a nickel. It spread, and by about four days after the presumed exposure, covered approximately half of the back of the hand. On-campus medical referred to a more experienced doctor, who ended up referring the student to a hospital with burn expertise (including chemical burns). The campus EH&S felt the response was due to the sulfuric or maybe the iodoacetic acids; the hospital agreed it looked like a chemical burn. The assumption is that acid penetrated the gloves or fell off the gloves onto skin during removal.
Treatment ended up including cadaver skin transplant; the student seems to be recovering well and doing fine. However, all involved would like a better understanding of what might have happened.
Information related to the question above, or other ideas as to what else you might consider checking for possibilities, is welcomed.
Thanks,
Sue
___________________________________
Susan D. Wiediger, Ph.D.
Professor of Chemistry
Southern Illinois University Edwardsville
swiedig**At_Symbol_Here**siue.edu 618-650-3088
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--
Jeff Lewin
Chemical Safety Officer
Research Integrity Office
Laboratory Operations
207 Advanced Technology Development Complex (ATDC)
Michigan Technological University
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