Chlorethoxyfos

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Chlorethoxyfos

中文通用名

氯氧磷

IUPAC

O,O-diethyl (RS)-O-(1,2,2,2-tetrachloroethyl) phosphorothioate

CAS

O,O-diethyl O-(1,2,2,2-tetrachloroethyl) phosphorothioate

CAS No.

54593-83-8

Molecular Formula

C₆H₁₁Cl₄O₃PS

Molecular Structure

General Product Information

Category

Insecticides > Organophosphorus insecticides

Activity

Insecticide.
Chlorethoxyfos is a very low-rate insecticide for application to soil. It controls soil-borne coleopteran and lepidopteran pests. The product can be applied in-furrow or as a T-band. It has vapour activity and does not require soil moisture for effect.
Chlorethoxyfos is suitable for use in no-till agriculture and can be used with herbicides such as nicosulfuron.

CropUse

Crop uses:
Maize (including field corn, pop corn, sweet corn, seed corn)

30 g ai/ha

Premix

Bifenthrin+chlorethoxyfos

Physical & Safety Data

Physical Properties

Molecular weight:336.0; Density:1.41 (20 °C); Composition:Tech. is 88%. Flash point:>230 °C; ( tech.,38 °C); Vapour pressure:c. 106 mPa (20 °C); Henry constant:3.5×101 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 4.59 (25 °C); Solubility:In water <1 mg/l; tech., 3 ppm (20 °C). Soluble in acetonitrile, chloroform, ethanol, hexane, xylene.; Stability:Stable at room temperature >18 months; stable at 55 °C for 2 weeks neat, in 316 stainless steel and in 504 ppm Fe2O3. Hydrolysis DT50 (25 °C) 4.3 d (pH 5), 59 d.

Toxicology

Oral:Acute oral LD₅₀ for female rats 1.8, male rats 4.8 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for female rabbits 12.5, male rabbits 18.5 mg/kg. Moderate eye irritant but highly toxic by eye contact (rabbits). Not a skin irritant (rabbits); not a skin sensitiser (guinea pigs), mild eye irritation. Inhalation:LC₅₀ (4 h) for rats 0.58 ppm (8 mg/m³), extremely toxic by inhalation. (Rabbit): Dermal LD50 >2000 mg/kg. ADI:(JMPR) 0.0005 mg/kg (PTDI) [

Environmental Profile

Ecotoxicology:?
Birds:Acute oral LD₅₀ (gavage) for bobwhite quail 28 mg/kg.Daphnia:LC₅₀ (48 h) 0.00041 mg/l.Fish:LC₅₀(96 h) for rainbow trout 0.10, bluegill sunfish 0.0023, sheepshead minnow 0.00047 mg/l.?
Environmental fate:?
Animals:Major metabolites are CO₂ and biosynthetic intermediates such as serine, glycine and glycine conjugates.Soil:Soil DT₅₀ (25 °C) (lab. studies) 7 d (Hanford sandy loam), 20 d (Flanagan loam); field soil dissipation DT₅₀ 2-3 d. K_d 33-98.Plant:The proposed pathway is degradation to trichloroacetic acid and thence to oxalic acid, etc.

Mallard duck	LD₅₀ 203 ppm
Bobwhite quail	LD₅₀ 36 mg/kg
Rainbow trout [96 hrs]	LC₅₀ 89 μg/litre

Fate in soil:
Chlorethoxyfos is strongly adsorbed by soil particles. Its half-life in soil is less than one week.?
SOIL PARTICLE ADSORPTION: Strongly adsorbed (K_OC = 6125) ; WATER SOLUBILITY: 2.1 ppm at 25°C.

Transport Information

Signal Word:DANGER; Hazard Class:Ia (Extremely hazardous)