Biologix LB Agar, Dry Powder by Biologix is bottled LB agar medium for pouring plates for E. coli and general bacterial culture. Choose the standard formula with 10 g/L sodium chloride at pH 7.0, or the Lennox low-salt version at pH 7.5 for salt-sensitive work. Quick to prepare and autoclave, in 250 g bottles with a 36-month shelf life.