Table 5.
Principal CWA degradation products and their estimated RfDe.a
| Agent Parent (CAS number) | Key degradation product | Degradation Product CAS number | Chronic toxicity valueb (estimated RfDe, in mg/kg/day) |
| Tabun (GA) (77-81-6) | None of potential concern | - | - |
| Sarin (GB) (107-44-8) | Methyl phosphonic acid (MPA) | 993-13-5 | 0.02 |
| Isopropyl methylphosphonic acid (IMPA) | 1832-54-8 | 0.10 | |
| Soman (GD) (96-64-0) | Methyl phosphonic acid (MPA) | 993-13-5 | 0.02 |
| Cyclosarin (GF) (329-99-7) | |||
| VX (50782-69-9) | S-(2-diisopropylaminoethyl) methylphosphonothioic acid (EA 2192) | 73207-98-4 | 6 × 10−7 |
| Ethyl methylphosphonic acid (EMPA) | 1832-53-7 | 0.028 | |
| Methyl phosphonic acid (MPA) | 993-13-5 | 0.02 | |
| Sulfur mustard (H, HD) (505-60-2) | Thiodiglycol (TDG) | 111-48-8 | 0.400c |
aDegradation products selected on basis of environmental persistence and/or toxicity; Talmage et al. (2007a,b), Munro et al. (1999), Reddy et al. (2005), and Capacio et al. (2008).
bUnless otherwise noted, values were estimated by Bausum et al. (1999).