Cycloxydim

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Chemical Identification

Common Name

Cycloxydim

中文通用名

噻草酮

IUPAC

(5RS)-2-[(EZ)-1-(ethoxyimino)butyl]-3-hydroxy-5-[(3RS)-thian-3-yl]cyclohex-2-en-1-one

CAS

2-[1-(ethoxyimino)butyl]-3-hydroxy-5-(tetrahydro-2H-thiopyran-3-yl)-2-cyclohexen-1-one

CAS No.

101205-02-1

Molecular Formula

C₁₇H₂₇NO₃S

Molecular Structure

General Product Information

Category

Herbicides > Cyclohexene oxime herbicides

Activity

Herbicide

Physical & Safety Data

Physical 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).

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 cro

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.
WATER SOLUBILITY: Tech: 0.0053 g/100g at 20°C.

Transport Information

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