my spelling sucks but its something like Sodium Benzite, if it has that its a fermentation inhibitor. If so I wouldnt use it unless you keg, and even then in the keg itself, when making root beer you use that extract with 4 LB of cane suger and then it only ferments enough for the pressure of carbonating the bottles. The Extract Austin homebrew supply sells, called Genome, dosnt contain SB.