... 5), 73 d (pH 7), 51 d (pH 9). pKa 2.9 haloxyfop-etotylMol. wt. 433.8 M.f. C19H19ClF3NO5 ... S.g./density 1.372 (20 °C) Solubility In water 9.08 mg/l (25 ºC). In acetone, cyclohexanone, dichloromethane ... ) 6.12 mg/l. Algae EC50 (5 d) 1.72 mg/l. Bees LD50 (48 h, oral and contact) >100 mg ... square root first order kinetics and involves degradation to the pyridinol and other minor metabolites. DT50 9 to 20.5 d, ...