From Sigma-Aldrich SDS:

https://www.sigmaaldrich.com/MSDS/MSDS/DisplayMSDSPage.do?country=US&language=en&productNumber=202584&brand=ALDRICH&PageToGoToURL=https%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fproduct%2Faldrich%2F202584%3Flang%3Den

GHS Label elements, including precautionary statements Pictogram Signal word Danger Hazard statement(s)

H250 Catches fire spontaneously if exposed to air.

H261 In contact with water releases flammable gases.. Precautionary statement(s)

P210 Keep away from heat/sparks/open flames/hot surfaces. No smoking.

P222 Do not allow contact with air. P223 Do not allow contact with water. P231 + P232 Handle under inert gas. Protect from moisture. P280 Wear protective gloves/ eye protection/ face protection. P335 + P334 Brush off loose particles from skin. Immerse in cool water/ wrap in wet bandages.

Tilak

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Jeffrey Lewin
Sent: Tuesday, September 11, 2018 9:42 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] Auto-ignition temperatures

The Alcoa GHS SDS I have for aluminum powder lists:

Product identifier ATOMIZED ALUMINUM POWDER

Auto-ignition temperature 1202 =B0F (650 =B0C) layered

Hazard statement May form combustible dust concentrations in air.

However, they also list DOT as not regulated.

The DOT Hazard Material Table lists:

Aluminum powder, coated as DOT 4.1 (Flammable Solid)

Aluminum powder, uncoated as DOT 4.3 (Dangerous when wet)

Jeff

On Tue, Sep 11, 2018 at 5:34 AM Debbie M. Decker <dmdecker**At_Symbol_Here**ucdavis..edu> wrote:

Hi All:

We're working through a list of materials classified as H250 (pyrophoric) but are having a terrible time finding auto-ignition data to back up that classification. It appears to have evaporated off Sigma SDS' and other sources (CRC, PubChem, ChemSpider, CAMEO) don't seem to have it either. Most irritating, to me, is the classification of powdered aluminum as pyrophoric with no auto-ignition data to back it up - just a note "ignites on contact with air." If that were the case, the entire pyrotechnic and propellant industries would have folded up by now.

Does anyone out there have auto-ignition data in a format they're able/willing to share? Or have any insight into where the data has gone off to?

Thanks mucho,

Debbie

Debbie M. Decker, CCHO, ACS Fellow

Past Chair, Division of Chemical Health and Safety

Councilor and Programming Co-Chair

University of California, Davis

(530)754-7964

(530)304-6728

dmdecker**At_Symbol_Here**ucdavis.edu

Birkett's hypothesis: "Any chemical reaction

that proceeds smoothly under normal conditions,

can proceed violently in the presence of an idiot."

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Jeff Lewin

Chemical Safety Officer

Compliance, Integrity, and Safety

Environmental Health and Safety

Michigan Technological University

Houghton, MI 49931

O 906-487.3153

--- 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