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Demeton-S-methyl

Demeton-S-methyl structure

CAS No:
919-86-8
Formula:
C6H15O3PS2
Chemical Name:
Demeton-S-methyl
Synonyms:
Phosphorothioic acid,S-[2-(ethylthio)ethyl] O,O-dimethyl ester;Phosphorothioic acid,S-[2-(ethylthio)ethyl] O,O-di-Me ester;Demeton-S-methyl;O,O-Dimethyl S-2-(ethylthio)ethyl phosphorothioate;S-[2-(Ethylthio)ethyl] O,O-dimethyl phosphorothioate;Metaisoseptox;Metaisosystox;Metasystox J;Methyl isosystox;S-[2-(Ethylthio)ethyl] O,O-dimethyl thiophosphate;Methyl demeton thioester;Metasystox I;Methylthionodemeton;Metasystox 55;Thiometon oxon;Methylmercaptophos thiol;1079803-49-8
Categories:
Agrochemicals > Insecticides

Description

Demeton-S-methyl is pale yellow in color, oily and has a sulfur-like odor. It is sparingly soluble in water, but is very rapidly soluble in common polar organic solvents, such as dichloromethane, 2-propanol, toluene, and n-hexane. It is a highly toxic, systemic, and contact insecticide and acaricide and is classifi ed as Category I. It is used for the control of insects, aphids, saw-fl ies, and spider mites on cereals, fruits, vegetables, and ornamental plants. On heating, demeton-s-methyl unde

Demeton-S-methyl Basic Attributes

Molecular Weight：

230.29

Exact Mass：

230.29

EC Number：

213-052-6

HScode：

29309090

Characteristics

PSA：

86.1

XLogP3：

1.32

Appearance：

Demeton-s-methyl is a pale yellow oil. Used as an insecticide. Not registered as a pesticide in the U.S. (EPA, 1998)

Density：

1.207 g/cm³ @ Temp: 20 °C

Melting Point：

<25 °C

Boiling Point：

118 °C @ Press: 1.0 Torr

Flash Point：

2 °C

Refractive Index：

1.496

Water Solubility：

Solubility in water, g/100ml at 20°C: 0.33

Storage Conditions：

-18°C

Vapor Pressure：

Vapour pressure, Pa at 20°C: 0.048

Vapor Density：

Relative vapour density (air = 1): 7.9

Toxicity：

Oral-rat LD50: 30 mg/kg; inhalation-rat LC50: 500 mg/m3/4 hours

Flammability characteristics：

Combustible, decomposes toxic nitrogen oxides, phosphorus oxides, sulfur oxides gases during combustion

Odor：

Unpleasant odor

Safety Information

Packing level：

Hazard category：

6.1(a)

Transport codes：

3018

wgk germany：

hazard class code：

24/25-51/53-36-20/21/22-11

safety instructions：

28-36/37-45-61-26-16

RTECS Number：

TG1750000

Marks：

T,N,Xn,F

Storage features：

Treasury is low temperature, ventilated, dry; stored separately from food raw materials

Stability/Shelf Life：

During storage and in water about 30% of the O-isomer goes to the S-isomer /Technical mixture/

Precautionary statement(s)：

P273-P280-P301 + P310 + P330-P302 + P352 + P312-P391-P501

Hazard Statements：

H301 + H311-H411

Toxicity

Toxicity class：

most toxic

Demeton-S-methyl Use and Manufacturing

Insecticide.

Computed Properties

Molecular Weight:230.3
XLogP3:1
Hydrogen Bond Acceptor Count:5
Rotatable Bond Count:7
Exact Mass:230.02002368
Monoisotopic Mass:230.02002368
Topological Polar Surface Area:86.1
Heavy Atom Count:12
Complexity:146
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes