Rate of Decomposition of GB in Seawater

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Science  25 Dec 1970:
Vol. 170, Issue 3965, pp. 1396-1398
DOI: 10.1126/science.170.3965.1396


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°C and pH 7.9 (typical values of many surface waters) the half-life of GB is approximately 30 minutes.