Cycloxydim

Source of the photo
http://fr.wikipedia.org/wiki/Fichier:Cycloxydim.svg
Author of the description
GK

Cycloxydim is a herbicide, which could be used and applied on crops without any restrictions. In the EU (under CLP) its classification as reprotoxic is under discussion with a probabale outcome of "no classification".

Physico-chemical Properties

  • Molecular weight: 325.5
  • Physical form: Colourless, odourless crystals; ( tech., yellow beige crystals, with a weak aromatic odour; dark brown oil above m.p.).
  • Density: 1.12 (20 °C); Melting point:c. 41 °C;
  • Flash point: 119 °C ( tech.);
  • Vapour pressure: <0.01 (20 °C);
  • Henry constant 8.14×10-5 Pa m3 mol-1 ( calc.);
  • Partition coefficient(n-octanol and water): logP c. 1.36 ( pH 7, 25 °C).; pKa:c. 4.17;
  • Solubility: In water 40 mg/l (20 °C). In acetone, ethanol, dichloromethane, ethyl acetate, toluene >1000 (all in g/ kg, 20 °C). In n-hexane 29 g/ kg (20 °C).;
  • Stability: Stable at room temperature for 1 y; unstable above 30 °C; decomposes c. 127 °C. DT50 in argon atmosphere at 20 000 lux (simulated sunlight, 15-20 °C) >192 h; in air at 80 000 lux (simulated sunlight, 20 °C).
  • WATER SOLUBILITY: Tech: 0.0053 g/100g at 20°C.

Toxicology

  • Oral: Acute oral LD50 for rats c. >5000 mg/ kg.
  • Percutaneous: Acute percutaneous LD50 for rats >2000 mg/kg.
  • Non-irritating to skin and eyes (rabbits).
  • Inhalation: LC50 (4 h) for rats >5.28 mg/l.
  • Phytotoxicity: Non-phytotoxic to all broad-leaved crops, when used as directed. Phytotoxic to graminaceous crops

Environmental Profile

Ecotoxicology:

  • Bees: Non-toxic to bees; LD50 >100 μg/bee.
  • Birds: Acute oral LD50 for quail >2000 mg/kg.
  • Daphnia: LC50 (48 h) 132 mg/l.
  • Fish: LC50 (96 h) for trout 220 mg/l , bluegill sunfish >100 mg/l.

Environmental fate:

  • Animals: See Soil/Environment.
  • Soil: Rapidly broken down in plants, animals and in the soil by oxidation, conjugation, rearrangement, hydroxylation, and reductive ether-cleavage (Proc. Br. Crop Prot. Conf. - Pests Dis., 1988, 1, 335-341).
  • Plant: See Soil/Environment.

Transport Information: Signal Word: CAUTION; Hazard Class: III (Slightly hazardous)

More details can be find in the attached document of FAO.

 

Source of description

http://www.pesticideinfo.org/Detail_Chemical.jsp?Rec_Id=PC38485

http://fr.wikipedia.org/wiki/Fichier:Cycloxydim.svg

http://www.agropages.com/agrodata/Detail-351.htm

http://www.fao.org/fileadmin/templates/agphome/documents/Pests_Pesticides/JMPR/Report09/Cycloxydim.pdf

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