A good rule of thumb is flammable solvent greater than about 20% in water probably has enough of a flash point for it to meet "flammable" characteristics.
Yeah - this is hazardous waste and should be managed as such.
Debbie M. Decker, CCHO, ACS Fellow
Immediate Past Chair, Division of Chemical Health and Safety
University of California, Davis
Birkett's hypothesis: "Any chemical reaction
that proceeds smoothly under normal conditions,
can proceed violently in the presence of an idiot."
We have a research group that wants to begin a HPLC project using tetrafluoroacetic acid/acetonitrile mix (diluted to 40% in water) as the solvent. The student working on the project has used this procedure at another institution and said
they dumped the waste solvent down the drain. Really? I thought this would still have some characteristic hazard. Does anyone else have experience with this mixture, and how do you dispose of it properly?
Laurie M. Yoder
Assistant Professor of Chemistry and Chemical Hygiene Officer
Eastern Mennonite University
1200 Park Road
Harrisonburg, VA 22802
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