Rate of Decomposition of GB in Seawater.
The hydrolysis rate of isopropyl methylphosphonofluoridate (GB) in seawater can be predicted from known or extrapolated rate constants for the reaction between GB and the hydroxo-metal complexes of magnesium and calcium and between GB and the hydroxide ion. At 25 degrees C and pH 7.9 (typical values of many surface waters) the half-life of GB is approximately 30 minutes.
Epstein
J
J