Systemic Phosphate S Demeton-S
Structural formula
| Business number | 03K9 |
|---|---|
| Molecular formula | C8H19O3PS2 |
| Molecular weight | 258.34 |
| label |
O,O-diethyl-S-2-ethylthioethylphosphorothioate, O,O-Diethyl-S-2-ethylthio-ethyl phosphorothioate, Organophosphorus pesticides |
Numbering system
CAS number:126-75-0
MDL number:MFCD00055359
EINECS number:None
RTECS number:None
BRN number:None
PubChem ID:None
Physical property data
1. Properties: Transparent oily liquid with garlic smell
2. Solubility: soluble in toluene, xylene, chloroform and other organic solvents, insoluble in water
3. Boiling point 128℃ (133Pa)
4. Relative density: (20/4℃) 1.132
5.Refractive index: 1.5000
Toxicological data
Acute toxicity data
Rat oral LD50: 1500ug/kg
Rat abdominal cavity LD50: 1500ug/kg
Rat veinLD50: 1700ug/kg
Mouse oral LDLo: 5800 ug/kg
Mouse abdominal cavity LD50: 174ug/kg
Under the bark of small trees LD50: 6mg/kg
Unknown mouse pathwayLD50：5600ug/kg
Rabbit skin contactLDLo: 5 mg/kg
Guinea pig abdominal cavity LD50: 5500ug/kg
Ecological data
None
Molecular structure data
5. Molecular property data:
1. Molar refractive index: 65.47
2. Molar volume (m3/mol）：225.3
3. isotonic specific volume (90.2K):563.1
4. Surface Tension (dyne/cm):38.9
5. Polarizability（10-24cm3):25.95
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond acceptors: 5
4. Number of rotatable chemical bonds: 9
5. Number of tautomers: none
6. Topological molecule polar surface area 86.1
7. Number of heavy atoms: 14
8. Surface charge: 0
9. Complexity: 168
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. Uncertain number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Number of uncertain chemical bond stereocenters: 0
15. Number of covalent bond units: 1
Properties and stability
Basic properties: Systemic phosphorus is a mixture of two isomers (O:S=70:30): thione (O) and thiol (S). The thione form quickly converts to the thiol form at higher temperatures.
Storage method
Storage: sealed and stored at low temperature
Synthesis method
Brief description of production method: Obtained from the reaction of thiophosphoryl chloride and hydroxyethyl sulfide
Purpose
Usage: Mainly used to control aphids and red spider mites on cotton and fruit trees and other sucking mouthparts pests, or use stem coating method to control sorghum aphids. 50% EC 3000 times liquid spray, the dosage per hectare is 0.2-0.6kg, which can control cotton aphids, red spider mites, leafhoppers, blind bugs, thrips, etc. It can also control fruit tree aphids, red spider mites, pear wasps, citrus fruit trees, etc. For orange seedling leafminers, the efficacy of the drug generally lasts for 2-4 weeks. Applying 150-200 times of EC to the stems can control highly infected aphids. Wrapping tree trunks with 10-20 times of EC can prevent citrus aphids, rust ticks and scale insects. Generally, approximately 100ml of medicinal solution is injected into each tree depending on the age of the tree. However, it is no longer used due to its high toxicity and resistance of pests.
/SPAN>Polarizability（ 10-24cm3): 25.95
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond acceptors: 5
4. Number of rotatable chemical bonds: 9
5. Number of tautomers: none
6. Topological molecule polar surface area 86.1
7. Number of heavy atoms: 14
8. Surface charge: 0
9. Complexity: 168
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. Uncertain number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Number of uncertain chemical bond stereocenters: 0
15. Number of covalent bond units: 1
Properties and stability
Basic properties: Systemic phosphorus is a mixture of two isomers (O:S=70:30): thione (O) and thiol (S). The thione form quickly converts to the thiol form at higher temperatures.
Storage method
Storage: sealed and stored at low temperature
Synthesis method
Brief description of production method: Obtained from the reaction of thiophosphoryl chloride and hydroxyethyl sulfide
Purpose
Usage: Mainly used to control aphids and red spider mites on cotton and fruit trees and other sucking mouthparts pests, or use stem coating method to control sorghum aphids. 50% EC 3000 times liquid spray, the dosage per hectare is 0.2-0.6kg, which can control cotton aphids, red spider mites, leafhoppers, blind bugs, thrips, etc. It can also control fruit tree aphids, red spider mites, pear wasps, citrus fruit trees, etc. For orange seedling leafminers, the efficacy of the drug generally lasts for 2-4 weeks. Applying 150-200 times of EC to the stems can control highly infected aphids. Wrapping tree trunks with 10-20 times of EC can prevent citrus aphids, rust ticks and scale insects. Generally, approximately 100ml of medicinal solution is injected into each tree depending on the age of the tree. However, it is no longer used due to its high toxicity and resistance of pests.