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Chemical Identification
Common Name
Diclofop
IUPAC
(RS)-2-[4-(2,4-dichlorophenoxy)phenoxy]propionic acid
CAS
2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acid
CAS No.
40843-25-2
Molecular Formula
C15H12Cl2O4
Molecular Structure
Physical Properties
Molecular weight:327.2. Physical form:Yellowish-white solid. Density:1.4 (20 °C); Melting point:118-122 °C; Vapour pressure:3.1×10-6 mPa (20 °C); 9.7×10-6 mPa (25 °C); 1.7×10-3 mPa (50 °C) (vapour pressure balance); Partition coefficient(n-octanol and water):logP = 2.81 ( pH 5), 1.61 ( pH 7); pKa:3.43; Solubility:In water 0.453 ( pH 5), 122.7 ( pH 7), 127.4 ( pH 9) (all in g/l, 20 °C).
Toxicology
Oral:Acute oral LD50 for female rats 586 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats 1657 mg/ kg. ADI:0.001 mg/ kg b.w. (AgrEvo proposed value).
Environmental Profile
Ecotoxicology: Fish: LC50 (96 h) for rainbow trout 21.9, golden orfe 79.9 mg/l.
Transport Information
Hazard Class:O (Obsolete as pesticide, not classified)

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