As a general rule of thumb, i was using a fairly logical formula to calculate flash point. Essentially, take the conc. of each constituent and divide it by its flash point, sum these and put them under 100 and you get an accurate estimate. Here is the real question.
When using an equation like this, what flash point should i assign water in a dilution. Say a mix of 50/50 methanol? Ethanol has a flash point of 13C, what would the flash point be for the dilution?