From: Ben Ruekberg <bruekberg**At_Symbol_Here**>
Subject: Re: [DCHAS-L] Devarda's Alloy
Date: Thu, 11 Jul 2013 14:20:18 -0400
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 00e501ce7e63$4c335e20$e49a1a60$**At_Symbol_Here**

Here is my best guess.  I believe that Decarda’s alloy is composed of (mostly) aluminum, copper and zinc.  Aluminum is apt to be the most reactive (and definitely should be kept away from caustics like sodium or potassium hydroxide and should probably be kept away from acids and oxidizers as well).  I would suggest that the question is one of particle size.  If you are talking about an ingot, you are probably pretty safe.  If you are talking about a fine powder, it is apt to be pyrophoric.  My suggestion, again a guess, would be to store it more or less as you would pure aluminum of the same particle size and away from acids because of the zinc.  At least until someone more authoritative comes along.

Thank you,


Ben Ruekberg


From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Emily Coombs
Sent: Thursday, July 11, 2013 1:03 PM
Subject: [DCHAS-L] Devarda's Alloy


We recently acquired some Dacarda's Alloy and are being faced with whether or not it needs to be stored in a flammables cabinet. We have not yet received an MSDS from the Manufacturer, and even just the NFPA ratings seem to vary incredibly. (Yes we are absolutely looking at the rest of the MSDS, but this provides a quick overview of how differently it is being presented in the different sources.)

From Sigma Aldrich (available from their site, but I am unable to attach here):

NFPA Rating
Health hazard: 0
Fire: 3
Reactivity Hazard: 3

From ScienceLab MSDS
Health: 3
Flammability: 1
Reactivity: 1
Specific hazard

From SIRI (not a source I would normally use, but is specifically listing the brand we have)
Health Rating: 0 - None
Flammability Rating: 1 - Slight
Reactivity Rating: 1 - Slight
Contact Rating: 0 - None

Can anyone shed any light on this particular materials' storage? It has caused some controversy here, and we would appreciate another perspective. Thank you!


Emily Coombs

Chemical Laboratory Manager

Simmons College

(617) 521-2725

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