ZL¢ 
Table III. Hydrolysis constant is in 1072K(h71) at 70°C. 
In parentheses, the half-life in hours (continued) 


COMPOUND n-HC1 pH=1 2 3 4 5 7 8 9 
Disyston (XI) 2.88 1.11 1.11 1.10 1.11 1.16 1.56 © 2.50 3.22 9.61 
(24) (62) (62) = (62) (62) (60) (44) (27.6) (21.5) (7.2) 
Guthion (IX) 8.95 2.92 5.11 7.72 9.68 7.80 9.26 14.5 29.3 117 
| (7.75) (24) (13.5) (9) (7.2) (8.9) (7.5) (4.8) (2.4) (0.6) 
PO-Guthion 30.5 15.4 15.2 15.4 17.3 15.9 17.4 32.8 76.0 - 
(XXIX) (2.27) (4.5) (4.5) (4.5) (4.0) (4.4) (4.0) (2.1) (0. 88) - 
Dipterex (XIII) 6.2 2.15 2.02 2.09 2.60 4.54 22.8 100 111 693 
(11.2) (32) (34) (33) (26.6) (15.3) -(3.0) (0.7) (0.6) (0.1) 
DDVP (ITI) 111 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) - 7 
Chlorthion ( XIX) 0.035 0.06 0.08 0.10 0.11 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) (11.2) (11.0) (10.7) (10.0) (6.9) (2.7) 1.5 
