Hi Dan!

Accepting your observations, does ASTM E27, have an error calculation to place a range on the number created using the standard for a given substance?

Clearly, I do not have this standard or I=E2=80™d look it up.

Thanks in advance!

Dr. Bob Haugen

Director of Product and Technology Development

Flow Sciences, Inc.

910 332 4878

www.flowsciences.com
Linkedin - Facebook - Youtube - Twitter

Customer Satisfaction Survey

CONFIDENTIALITY NOTE: This e-mail, including all attachments, is directed in confidence solely to the person(s) to whom it is addressed, or an authorized recipient, and may not otherwise be distributed, copied or disclosed. The contents of this transmission may also be subject to intellectual property rights and all such rights are expressly claimed and are not waived. The contents of this e-mail do not necessarily represent the views or policies of Flow Sciences Inc. or its employees.

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Daniel Crowl
Sent: Wednesday, January 26, 2022 5:14 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] Chemical Safety headlines (10 articles)

Hi All,

It is difficult to experimentally determine the autoignition temp of dusts. The result is highly dependent on particle size and shape, particle loading, moisture content, etc. I would expect high variability. For a number of years I was on the ASTM E27 committee that handled the auto ignition standard.

Dan Crowl

On Wed, Jan 26, 2022 at 2:19 PM James Kaufman <jkaufman**At_Symbol_Here**labsafetyinstitute.org> wrote:

Opinion appears to be somewhat divided on the autoignition temperature of sulfur. Fisher Scientific says 232 degrees C.

James A. Kaufman, PhD

Founder/President Emeritus

The Laboratory Safety Institute (LSI)

A Nonprofit Educational Organization for Safety in Science, Industry, and Education

192 Worcester Street, Natick, MA 01760-2252

(O) 508-647-1900 (F) 508-647-0062 (C) 508-574-6264 Skype: labsafe; 508-401-7406

jim**At_Symbol_Here**labsafety.org www.labsafety.org Teach, Learn, and Practice Science Safely

On Wed, Jan 26, 2022 at 3:24 PM davivid <davivid**At_Symbol_Here**well.com> wrote:

Turns out the reported autoignition temperature for sulfur is as low as
168C. The dust is quite sensitive and hydrocarbon impurities are known
to decrease the autoignition temp.

http://www.sulphuric-acid.com/techmanual/Plant_Safety/safety_sulphur.htm

This is lower than that of red phosphorus at 260C.

https://web.stanford.edu/dept/EHS/cgi-bin/lcst/lcss/lcss72.html


Regards
Dave Lane
Principal
Clavis Technology Development

On 1/26/22 7:45 AM, Monona Rossol wrote:
> At last. My ppt has examples of all kinds of deflagration substances, but I haven't had a good one on sulfur. Monona
> CAUSE DETERMINED OF SULFUR FIRE AT CERES FARM COMPANY
> https://www.modbee.com/news/local/article257699048.html
> Tags: us_CA, industrial, follow-up, environmental, ag_chems
>
> The source of a hazardous materials fire that prompted a 12-hour shelter in place advisory for some Ceres residents on Monday was determined to be a light bulb.
>
> An employee at Stanislaus Farm Supply on East Service Road was changing a light bulb inside a 40,000-square-foot warehouse that contained a large amount of fertilizer-grade sulfur, said Dustin Bruley, supervisor of the Stanislaus Regional Fire Investigation Unit.
>
> "In those warehouses they have a lot of dust floating in the air attributed to that product and when you change out a light bulb the simplest spark or static electricity can set off the particulate that floats in the air," Burley said. In this case the particulate was flammable sulfur.
>
> He said the spark caused flash fire, "The air around it has this matter floating so when it ignites, anything in that room has the potential to ignite as well."
>
> A 500-ton pile of fertilizer sulfur began smoldering. Employees tried to put it out but the fire grew larger than they could handle.
>
>
> Twitter **At_Symbol_Here**acsdchas
>
> ---
> For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org
> Follow us on Twitter **At_Symbol_Here**acsdchas
>

---
For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org
Follow us on Twitter **At_Symbol_Here**acsdchas

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas