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
--- 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**acsdchasOn 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
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