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Methyl demeton
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Name

Methyl demeton

 EINECS N/A
CAS No. 8022-00-2 Density 1.1900
PSA 190.83000 LogP 5.79760
Solubility N/A Melting Point N/A
Formula C6H15O3PS2 Boiling Point 261.8°C at 760 mmHg
Molecular Weight 230.30 Flash Point 112.1°C
Transport Information N/A Appearance N/A
Safety Deadly poison by ingestion, skin contact, and inhalation routes. A cholinesterase inhibitor. An insecticide and acaricide. See also PARATHION and DEMETON; DEMETON-O + DEMETON-S; DEMETON-O-METHYL; DEMETON-O-METHYL SULFOXIDE; DEMETON-S; DEMETON-S-METHYL; DEMETON-S-METHYL-SULPHONE. Risk Codes N/A
Molecular Structure Molecular Structure of 8022-00-2 (Demeton methyl powder(content>10%)) Hazard Symbols Cholinesterase inhibito. Use may be restricted, absorbed by skin. TLV: 0.5 mg/m3.
Synonyms

Demeton methyl powder(content>10%);Methyl 1059 powder;OXYDEMETON-METHYL=S-(2(ETHYL-SULPHINYL)-ETHYL)O,O-DIMETHY.;O,O-dimethyl-O-(2-(ethylthio)ethyl) thiophosphate mixed with-O,O-dimethyl-S-(2-(ethylthio)ethyl) thiophosphate

 

Methyl demeton Chemical Properties

Molecule structure of Methyl demeton (CAS NO.8022-00-2) :

IUPAC Name: 1-dimethoxyphosphorylsulfanyl-2-ethylsulfanylethane;2-ethylsulfanylethoxy-dimethoxy-sulfanylidene-λ5-phosphane 
Molecular Weight: 460.570522 g/mol
Molecular Formula: C12H30O6P2S4 
Density: 1.197 g/cm3 
Boiling Point: 287.4 °C at 760 mmHg 
Flash Point: 127.6 °C
Index of Refraction: 1.496
Molar Refractivity: 56.2 cm3
Molar Volume: 192.3 cm3
Polarizability: 22.28*10-24 cm3
Surface Tension: 39.9 dyne/cm 
Enthalpy of Vaporization: 50.55 kJ/mol 
log P (octanol-water): 1.110 
Water Solubility: 22 mg/L 
Vapor Pressure: 8.64E-04 mm Hg 
Henry's Law Constant: 2.57E-09 atm-m3/mole 
Atmospheric OH Rate Constant: 4.72E-11 cm3/molecule-sec
H-Bond Acceptor: 6
Rotatable Bond Count: 14
Exact Mass: 460.040044
MonoIsotopic Mass: 460.040044
Topological Polar Surface Area: 63.2
Heavy Atom Count: 24
Complexity: 292
Canonical SMILES: CCSCCOP(=S)(OC)OC.CCSCCSP(=O)(OC)OC
InChI: InChI=1S/2C6H15O3PS2/c1-4-11-5-6-12-10(7,8-2)9-3;1-4-12-6-5-9-10(11,7-2)8-3/h2*4-6H2,1-3H3
InChIKey: KPNPDRFFWQBXGT-UHFFFAOYSA-N

Methyl demeton Toxicity Data With Reference

1.    

skn-rat LD50:300 mg/kg

     WRPCA2    World Review of Pest Control. 9 (1970),119.
2.    

orl-mus LD50:46 mg/kg

     85GMAT    Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure Izmerov, N.F., et al.,Moscow, USSR.: Centre of International Projects, GKNT,1982,85.
3.    

orl-cat LDLo:30 mg/kg

     85GMAT    Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure Izmerov, N.F., et al.,Moscow, USSR.: Centre of International Projects, GKNT,1982,85.
4.    

ihl-cat LC50:20 mg/m3/4H

     85GMAT    Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure Izmerov, N.F., et al.,Moscow, USSR.: Centre of International Projects, GKNT,1982,85.
5.    

orl-rbt LDLo:150 mg/kg

     JEENAI    Journal of Economic Entomology. 48 (1955),139.

Methyl demeton Safety Profile

Deadly poison by ingestion, skin contact, and inhalation routes. A cholinesterase inhibitor. An insecticide and acaricide. See also PARATHION and DEMETON; DEMETON-O + DEMETON-S; DEMETON-O-METHYL; DEMETON-O-METHYL SULFOXIDE; DEMETON-S; DEMETON-S-METHYL; DEMETON-S-METHYL-SULPHONE.
RIDADR: 3018
HazardClass: 6.1(a)
PackingGroup: II

Methyl demeton Standards and Recommendations

OSHA PEL: TWA 0.5 mg/m3 (skin)
ACGIH TLV: TWA 0.5 mg/m3 (skin)
DFG MAK: 0.5 ppm (4.8 mg/m3)

Methyl demeton Specification

 Methyl demeton (CAS NO.8022-00-2) is also called Bayer 21/116 ; CCRIS 3898 ; Caswell No. 456 ; Demeton M ; Demeton methyl ; EPA Pesticide Chemical Code 058701 ; Metasystox ; Metasystox forte ; Methyl demeton 25 EC ; Methyl mercaptophos ; Methyl systox ; Methyl-mercaptophos ; Methylmerkaptofos [Czech] ; Phosphorothioic acid, O-(2-(ethylthio)ethyl) O,O-dimethyl ester, mixt. with S-(2-(ethylthio)ethyl) O,O-dimethyl ester ; S(and O)-2-(Ethylthio)ethyl O,O-dimethyl phosphorothioate . Methyl demeton (CAS NO.8022-00-2) is oily colorless to pale yellow liquid with an unpleasant odor. It is slightly water soluble and hydrolyzed by alkali . Organothiophosphates, such as Methyl demeton, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides. Flash point data for Methyl demeton are not available. Methyl demeton is probably combustible. So the storage environment should be ventilate, low-temperature and dry. Keep Methyl demeton (CAS NO.8022-00-2) separate from raw materials of food.

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