G8Y 
Table III. Hydrolysis constant is in 107*K(h~*) at. 70°C. 
In parentheses, the half-life in hours (continued) 
COMPOUND n-HCl _— ppH=1 2 3 4 5 6 7 8 9 
Disyston (XI) 2.88 L.1l1 1.11 LO L.11 1.16 1.56 2490: 3422 F661 
(24) (62) (62) (62) (62) (60) (44) (27.6) (21.5) Chal) 
Guthion (IX) 3.95 2.92 Seale 7.72 9.68 7.80 9.26 14.5 29.3 117 
(7.75) (24) PALS, (9) (7.2) (8.9) (7.5) (4.8) (2.4) (0.6) 
PO-Guthion 30.5 15.4 15.2 15.4 Td. 3 349 17.4 CUM «| 76.0 - 
(XXIX) (2.27) (4.5) (4.5) (4.5) (4.0) (4.4) (4.0) (2.1) (0.88) - 
Dipterex (XIIT) G52 ZeLo 2.02 209 2.60 4.54 22.8 100 lll 693 
Cll 20 (32) (34) (33) (26.6) (1533) (3.0) (0.7) (0.6) (0.1) 
DDVP (ITI) IBS 29.6 20.5 20.3 22.9 24.8 48.7 152 - - 
(0.6) (2+3) (3.4) (3.4) (3.0) (2.8) (1.4) (0.45 _ - 
Chlorthion (XIX) 0.035 0.06 0.08 0.10 Oe Tal 0.13 0.15 0.19 0.48 - 
(20) (11.6) (8.7) (6.9) (6.1) (5.«3) (4.6) (3.6) (1.4) - 
Methyl-E 605 0.022 0.045 0.058 0.062 0.063 0.065 0.069 0.10 0.26 0.45 
(XVIIT) (31) (15.4) (12.0) CI.2) (11.0) (10.7) (10.0) (6.9) (2.7) L5 

