I went down this road many years ago and gave up.  The problem is that the
only acceptable test of flammability is the "flash point".  The flash point
defines flammability, and is what is accepted by the EPA, OSHA, and more
importantly the insurance companies.  While the solvents that you mention
are miscible, once a little heat is applied they will separate and form a
flammable mixture in the air. All flammable solvents mixed with water should
be treated, handled, and stored as flammable liquids.

Carl Zipfel, csp

----- Original Message ----- 
From: "Hadden, Susan [PRDUS]" 
To: 
Sent: Monday, January 29, 2007 2:36 PM
Subject: [DCHAS-L] Aqueous/Flammable solvent mixtures

> Many of our researchers use aqueous mixtures of miscible flammable
solvents
> for their LC work. They often have questions about storage and whether to
> treat them as flammable or not. I've been looking for data that might show
> me flammability as a function of concentration for the common solvents
such
> as CH3CN, MeOH, EtOH, IPA, etc. I've checked OSHA, NFPA and ASTM but can't
> find any solvent specific data. Does anyone know where I might find that
> information?
>
> Thanks,
>
> Susan Hadden
> Senior Occupational Safety Specialist
> J&J PRD Environmental, Health & Safety
> 1000 Rt 202, PO Box 300
> Raritan, NJ 08869
> 908-704-4295 (ph), 908-707-9211 (fax)

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