The updated version (2011) of Prudent Practices in the Laboratory, Handling and Disposal of Chemicals lists peroxide formers as Group A, B and C. This may be in line with the CRC Handbook=85but I do not have a recent copy. JW
Occupational Safety & Health Manager/Industrial Hygienist
I thought I'd throw this out for its educational value.
For those that may not be aware, there are two lists of peroxide formers that appear to compete with each other: Groups a through D and Class I, II, and III.
1. Prudent Practices in the Laboratory, Handling and Disposal of Chemicals, 1995, National Academies Press.
Note: Prudent Practices in the Laboratory designates peroxide formers as Class I, II, III and they are listed from the LEAST dangerous to the MOST dangerous respectively.
2. CRC Handbook of Laboratory Safety, Furr, A. Keith, 2000, CRC Press
Note: CRC Handbook of Laboratory Safety designates peroxide formers as Group A, B, C, D and they are listed from the MOST dangerous to the LEAST dangerous respectively.
Certified Chemical Hygiene Officer
Laboratory Safety Manager
Office of Environmental, Health, and Safety Management
1514 East Third Street
Bloomington, IN 47405
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDUSent: Sunday, October 30, 2011 2:42 AM
Subject: Re: [DCHAS-L] Peroxide Formers - Questions
Originally we were using Sensafe Water-works test strips. Although
designed for use with water they did give positive and negative results in
solvents. It should probably be considered more of a qualitative than a
quantitative test. I can say with certainty that when testing dozens of
bottles of diethyl ether and THF, the older bottles showed higher peroxide
levels than newer bottles, many of which gave no detectable reading.
I just recently received something called XploSens PS from a company
called Xplosafe via Sigma Aldrich. Unfortunately the Sigma website was a
bit misleading as I was expecting quantitative strips. These are purely a
If anyone on the board has any testing strip recommendations, then I am
Brandon Chance, M.S.
Safety and Environmental Compliance Manager
Office of Building Operations & HSSE
Texas A&M University at Qatar
PO Box 23874 | Doha, Qatar
TAMUQ Building Room 225E | Education City
(o) +974.4423.0495 | (m) +974.6668.3552 | SkypeIn USA 001.281.764.1776
It=B9s Time For Texas A&M
On 10/28/11 10:40 PM, "Pumphrey, Richard" <r.pumphrey**At_Symbol_Here**NEU.EDU> wrote:
>Can you tell me what test kit you use? We have not been able to find a
>reliable test for peroxides in solvents.
>----- Original Message -----
>From: Chance, Brandon [mailto:brandon.chance**At_Symbol_Here**QATAR.TAMU.EDU]
>Sent: Friday, October 28, 2011 03:22 PM
>Subject: Re: [DCHAS-L] Peroxide Formers - Questions
>Due to our location, it takes 6 months or longer in many cases to order
>and receive chemicals and shipping can be very expensive. It is not
>feasible to order a few bottles of ethyl ether or THF every month and we
>must order in bulk quantities meaning that things are at least halfway
>through their shelf life before we even receive them. Because of this,
>we have a program in place for peroxide monitoring. In a nutshell, once
>the expiration date is reached, the chemicals are tested every six months
>for peroxide formation and the bottles are tagged showing testing and
>results. If it tests positive (I think the level we use is over 20ppm
>but will have to reference my notes back at the office on Sunday), then
>we handle the neutralization and disposal. Due to our location, we are
>not comfortable with the waste company handling compounds that test
>positive, so we neutralize them ourselves before sending them off as
>If there is something we can not handle; for example, the discovery of
>ethers that expired in the early 90s, then we call out the military to
>handle the retrieval and disposal.
>I am not sure if this helps, but thought I would give you my two cents.
>Safety and Environmental Compliance Manager
>Office of Building Operations & HSSE
>Texas A&M University at Qatar
>PO Box 23874 | Doha, Qatar
>TAMUQ Building Room 225E | Education City
>(o) +974.4423.0495 | (m) +974.6668.3552 | SkypeIn USA 001.281.764.1776
>It=B9s Time For Texas A&M
>Date: Fri, 28 Oct 2011 10:55:07 -0400
>Subject: [DCHAS-L] Peroxide Formers - Questions
>I would like to know how folks are handling peroxide formers. Some
>background on my program is that we have 2 lists. Group A =AD we require
>disposal after 3 months from opening (i.e. Sodium amide). And Group B =AD
>we require disposal 12 months after opening and 24 months after receipt
>(whichever comes first) (i.e. ether, THF=D0etc.).
>Specifically, I would like to know what folks do for the following:
>1. A researcher identifies a peroxide former is past the expiration
>date. What do they do?
>a. Call EHS
>b. Do you have date ranges that then trigger EHS. For example, if
>THF is 1 year past its required disposal date then do they call EHS.
>But if the date is within 1 year past the disposal date then they follow
>normal waste disposal guidelines.
>2. What are your timeframes for requiring folks to contact EHS?
>a. Group A
>b. Group B
>3. Do you have timeframes for when EHS would consider the material
>a =B3High Hazard=B2 and call in a High haz waste contractor?
>4. Or, do you rely on visual cues and knowledge of the specific
>Your feedback is appreciated. Thanks
>Environmental, Health, and Safety
>webbi/employeeinf/safetyenv/index.jsp> to see the EHS webpage
> << OLE Object: Picture (Device Independent Bitmap) >>
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