Published or not - fyto

CHLOROTHALONIL
Melting point 252 °C ( 99.6 / 99.8 %)
- 2 -
Boiling point > 350 °C
APPENDIX I
Identity, physical and chemical properties
20 January 2005
Appearance
Pure: white crystalline solid or powder
Techn.: white or tan powder
Relative density D 20 4 = 1.735 (99.8%)
Vapour pressure 7.62 x 10 –5 Pa at 25 °C
Henry's law constant 2.5 x 10 –2 Pa m 3 mol –1 at 25 °C
Solubility in water pH (neutral): 0.81 mg/l at 25 °C
Solubility in organic In g/l at 20 °C: acetone 20.6;
solvents
dichloroethane 22.4;
ethyl acetate 13.8;
n-heptane 0.20;
xylene 74.4;
methanol 1.36
Partition co-efficient (log
P ow )
pH effectively neutral (ASTM type II
water): Log Po/w = 2.94 at 25 °C
Hydrolytic stability (DT 50 ) pH 5: stable
pH 7 : stable
pH 9 : DT 50 = 16.1 days at 20 °C
Dissociation constant No dissociation
Quantum yield of direct
photo-transformation in
water at λ >290 nm
Flammability
Explosive properties
1.4 x 10 -3
Not highly flammable
No explosive properties
UV/VIS absorption (max.) 232 nm, 312 nm and 324 nm (ε=
62390, 1116 and 1507, resp.)
Photostability in water
(DT 50 )
At pH 5 and 25 °C is DT 50 = 64.7
days with 12 hours sunlight/day