Table 4.

Half-lives of liquid VX and HD in hydrolysis or oxidation solutions with estimated agent remaining after 48 hour degradation (initial unit concentration of 1.0 mg/cm²).

CWAs in solution	Half-life (minutes)	Estimated agent remaining after 48 hr degradation for an initial unit concentration (1.0 mg/cm2)
VX Hydrolysis
1.25M NaOH	1.8a	<4.23E-304 (mg VX/cm2)b
0.25M NaOH	10.8a	5.53E-81 (mg VX/cm2)
0.1M NaOH	31a	1.09E-28 (mg VX/cm2)
0.01M NaOH	198a	4.19E-05 (mg VX/cm2)
0.001M NaOH	1248a	2.02E-01 (mg VX/cm2)
Pure Water	3600a	5.74E-01 (mg VX/cm2)
Unbuffered Water	4680c	6.53E-01 (mg VX/cm2)
Sulfur mustard (HD)
Oxidation
>20% H2O2	<2d	<4.23E-304 (mg HD/cm2)b

^aYang et al. 1994;

^bThis value represents limit of software computational capability; actual value is less;

^cYang 1999;

^dWagner and Yang 2002.