Hi all:

Riddle me this – why is 5% hydrogen in nitrogen considered NOT flammable and 4% in argon considered flammable?  Tried to reach Praxair but no one is home.

This makes absolutely no sense to me.

Thanks,

Debbie

Debbie M. Decker, CCHO, ACS Fellow

Past Chair, Division of Chemical Health and Safety

Councilor and Programming Co-Chair

University of California, Davis

(530)754-7964

(530)304-6728

dmdecker**At_Symbol_Here**ucdavis.edu

Birkett's hypothesis: "Any chemical reaction

that proceeds smoothly under normal conditions,

can proceed violently in the presence of an idiot."