Jack,
That chemical is a double salt, so is far from meeting the definition of a flammable. (Salts have no vapor pressure to create a flash point.) As an organic it is combustible (burns), but not flammable. Therefore storage in a fridge should be fine.
Craig
Craig A. Merlic
Professor of Chemistry, UCLA Department of Chemistry and Biochemistry
Executive Director, UC Center for Laboratory Safety
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> on behalf of Jack Reidy <jreidy2**At_Symbol_Here**STANFORD.EDU>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Date: Monday, April 29, 2024 at 2:18 PM
To: <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Subject: [DCHAS-L] Self-heating chemical storage
Hi all,
A researcher reached out asking about how to store 2,2′-Azobis(2-methylpropionamidine) dihydrochloride (aka AAPH). It’s a new lab working in borrowed space, and they don’t have a refrigerator rated for storing flammables. Is this something you think a lab could safely store in a flammables cabinet? Thanks!
Sincerely,
Jack Reidy (he/him)
Research Safety Specialist & Assistant Chemical Hygiene Officer
Environmental Health & Safety
Stanford University
484 Oak Road, Stanford, CA, 94305
Tel: (650) 497-7614
I acknowledge that the land on which I live and work is the ancestral and unceded land of the Muwekma Ohlone Tribe. As an uninvited guest on these lands, I am a beneficiary of the ongoing displacement of the Ohlone people. I pay my respects to the Native peoples, past and present.
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