CLETHODIM
1. Common Name (ISO): clethodim
2. Chemical Name (IUPAC): (5RS)-2-{(E)-1-[(2E)-3-chloroallyloxyimino]propyl}-5-[(2RS)-2-(ethylthio)propyl]-3-hydroxycyclohex-2-en-1-one
3. CAS Number: 99129-21-2
4. Empirical Formula: C17H26ClNO3S
5. Structural Formula:
6. Molecular Mass: 359.9
III PHISICAL AND CHEMICAL PROPERTIIES (ACTIVE SUBSTANCES)
1. Appearance (physical state, color, odor): ember color clear viscouse liquid, odorless.
2. Melting point: not applicable for liquid. It is viscous oil liquid at ambient temperatures.
3. Boiling Point: >170℃
4. Flash Point: 110℃, closed cup method.
5. Viscosity: 100 cps, 20℃
6. Density: 1.15g/cm3, 20℃
7. Vapor Pressure: 1.3×10-5Pa, 20℃
8. Solubility in Water: Highly dependent on pH, 0.54g/100ml, pH 7.
9. Solubility in Organic Solvents: Soluble in most organic solvents, >90g/100ml.
10. Partion Coefficient (Octanol/Water): 1.5×104.
11. pH: 4.0—7.0, 4.1 in a stirred solution or 4.2 in a standing solution 4.9 (5% aqueous solution.
12. Hydrolysis (in acid, alkali and neutral environment): hydrolysis half-life at pH 7-9 is approximately 300 days. Propyl [14C]-clethodim degraded with half-lives of 26 days (pH 5) and approximately 300 days (pH 7 and 9). Allyl-labeled clethodim degraded with half-lives of 42 days(pH 5) and 360 days (pH 7). The degrades were clethodim, oxazole, and l-chloropropen-3-ol.
13. Absorption Spectra (UV/VIS, IR, NMR, MS): not available.
14. Adsorption/Desorption: adsorption coefficient: 0.49 @ pH=9; 40 @ pH=7; >3,000 @ pH=5.
15. Dissociation Constant: pKa=4.47
16. Stability: degrade in light, high temperature, < 1% and < 3% degradation in glass containers and aluminum containers, respectively, after one year of storage at 21℃
17. Application: Clethodim is highly selective, with suction-type conduction buds after herbicide. Strong growth in the use of weeds. Can control a variety of annual and perennial grassy weeds. An application period: annual grass weeds in 3 to 5 leaf stage, perennial grassy weeds in the tiller after the application of the most effective. An application of non-use would have increased dose or increase the number of application. Subject to the droplet distribution. The low volume spraying liquid (50L/ha) spray fluid volume is high (180 ~ 280L/ha) more effective. 2.34L/ha adding vegetable oil to increase biological activity
