Cycloate

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Cycloate

中文通用名

环草敌

IUPAC

S-ethyl cyclohexyl(ethyl)thiocarbamate

CAS

S-ethyl cyclohexylethylcarbamothioate

CAS No.

1134-23-2

Molecular Formula

C₁₁H₂₁NOS

Molecular Structure

General Product Information

Category

Herbicides > Thiocarbamate herbicides

Activity

Herbicide

Physical & Safety Data

Physical Properties

Molecular weight:215.4; Physical form:Colourless liquid with an aromatic odour. Specific gravity 1.023-1.026 at 20°C. Density:1.024 g/ml; Composition:Tech. material is 95% pure. Flash point:>100 °C; Vapour pressure:2.13 mPa (25 °C); Henry constant:6.12×10-3 Pa m3 mol-1 ( calc., 20 °C); Partition coefficient(n-octanol and water):logP = 3.88; Solubility:In water 75 mg/l (20 °C), Miscible with most organic solvents, e.g. acetone, benzene, methanol, ethanol, xylene, kerosene, etc.; Stability:Thermally stable (120 °C). Hydrolyzed by strong acids and alkalis. Stable to heating to 100°C for 16 hours. Miscible with acetone, benzene, ethanol, kerosene, 4-methylpentan-2-one, xylene.

Toxicology

Oral:Acute oral LD₅₀ for male rats 2000-3190 mg/kg, female rats 3160-4100 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rabbits >5000 mg/kg. Non-irritating to skin and eyes (rabbits). Inhalation: LC₅₀ (4 h) for rats 4.7 mg/l.

Environmental Profile

Ecotoxicology:
Bees:Not toxic to bees at 0.011 mg/bee.Birds: LD₅₀ for Japanese quail >2000 mg/kg. Dietary LC₅₀ (7 d) for bobwhite quail >56 000 mg/ kg diet (720 g/l for EC formulation).Daphnia: LC₅₀ (48 h) 5.6 mg/l.Fish: LC₅₀ (96 h) for rainbow trout 4.5 mg/l.
Environmental fate:
Animals:Cycloate is converted to the sulfoxide by microsomal enzymes, and then cleaved rapidly by the liver soluble-glutathione system.Soil:Microbial degradation is responsible for a large part of the disappearance of cycloate from soil. DT₅₀ in soil c. 4-8 w.Plant:Rapidly metabolised in the roots and leaves of beets. Metabolites include ethyl cyclohexylamine, CO₂, amino acids, sugars, and other natural plant constituents.
WATER SOLUBILITY: 75 mg/l

Transport Information

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