Self-heating chemicals only pose an ignition risk in large quantities (e.g. multiple pounds or kilograms) that are exposed to fresh air for an extended period of time (hours or days) – as Dr. Merlic indicated in his response, this does not need to be treated as a flammable for the purposes of storage.

For what it’s worth, the Sigma SDS for the product does claim in section 10.2 that it’s chemically stable during room-temperature storage. It does also recommend storage under inert gas in section 7.2.

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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