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CHLOROTHALONIL - 1 - APPENDIX I Identity, physical and chemical properties 20 January 2005 APPENDIX I Identity, physical and chemical properties CHLOROTHALONIL Common name (ISO) Chemical name (IUPAC) Chlorothalonil Tetrachloroisophthalonitrile Chemical name (CA) 2,4,5,6-Tetrachloro-1,3- benzenedicarbonitrile CIPAC No 288 CAS No 1897-45-6 EEC No 217-588-1 FAO SPECIFICATION Chlorothalonil not less than 985 g/kg Hexachlorobenzene max. 0.01 g/kg Decachlorobiphenyl: max. 0.03 g/kg Minimum purity 985 g/kg Molecular formula C 8 Cl 4 N 2 Molecular mass 265.9 Structural formula Cl CN Cl Cl Cl CN
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
Page 1 and 2: EUROPEAN COMMISSION HEALTH & CONSUM
Page 3 and 4: - 3 - By letter 6 March 1998 Zeneca
Page 5 and 6: - 5 - Annex I to Directive 91/414/E
Page 7 and 8: - 7 - 4. Identity and Physical/chem
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