298-03-3

Basic information

• Product Name: DEMETON O
• Synonyms: o,o-diethylo-(2-eththioethyl)phosphorothioate;O,O-diethylO-[2-(ethylthio)ethyl]-thiophosphate;o,o-diethylo-2-(ethylthio)ethylphosphorothioate;Phosphorothioic acid, O,O-diethyl O-[2-(ethylthio)ethyl] ester;phosphorothioicacid,o,o-diethylo-(2-(ethylthio)ethyl)ester;phosphorothioicacid,O,O-diethylO-[2-(ethylthio)ethyl]ester;Thiolmecaptophos;Demeton-O, Pestanal
• CAS NO: 298-03-3
• Molecular Formula: C₈H₁₉O₃PS₂
• Molecular Weight: 258.338421
• EINECS: 206-053-8
• Mol File: 298-03-3.mol
• Article Data: 5

Chemical Properties

• Boiling Point: 272.05°C (estimate)
• Flash Point: 45 °C
• Appearance: /
• Density: 1.1190
• Vapor Pressure: 0.00242mmHg at 25°C
• Refractive Index: 1.5
• Storage Temp.: −20°C
• Water Solubility: 60 mg l-1
• CAS DataBase Reference: DEMETON O(CAS DataBase Reference)
• NIST Chemistry Reference: DEMETON O(298-03-3)
• EPA Substance Registry System: DEMETON O(298-03-3)

Safety Data

• Hazard Codes: T+,N
• Statements: 27/28-50
• Safety Statements: 28-36/37-45-61
• RIDADR: 3018
• RTECS: TF3125000
• HazardClass: 6.1(a)
• PackingGroup: I
• Hazardous Substances Data: 298-03-3(Hazardous Substances Data)

Usage

Description

DEMETON O, also known as Demeton-O, is a light brown liquid with an odor of sulfur compounds. It has a freezing/melting point of less than or equal to -13°C. It is a type of organophosphate compound that has been used as an insecticide in the past, but its use has been restricted or banned in many countries due to its potential health and environmental risks.

Uses

Used in Pesticide Industry:
DEMETON O was historically used as an insecticide for controlling a wide range of pests in agriculture, including insects, mites, and nematodes. It was effective against pests that affected crops such as cotton, fruits, vegetables, and ornamental plants.
However, due to its high toxicity and potential for environmental contamination, the use of DEMETON O has been restricted or banned in many countries. Alternative, safer insecticides have been developed and are now used in place of DEMETON O.

Shipping

UN3278 Organophosphorus compound, liquid, toxic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Hazard Technical Name Required, Potential Inhalation Hazard (Special Provision 5). UN3017 Organophosphorus pesticides, liquid, toxic, flammable, flash point not , 23 C, Hazard class: 6.1; Labels: 6.1- Poisonous materials, 3-Flammable liquid. UN2810 Toxic liquids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1- Poisonous materials, Technical Name Required.

Waste Disposal

The thiono-and thiolo-isomers of this mixture are 50% hydrolyzed in 75 minutes and 0.85 min- ute, respectively @ 20℃ and pH 13. At pH 9 and 70 ℃ , the half-life of Demeton is 1.25 hour, but an pH 1-5 it is over 11 hours. Sand and rushed limestone may be added together with a flammable solvent; the resultant mixture may be burned in a furnace with afterburner and alkaline scrubber .In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be dis- posed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.

InChI:InChI=1/C8H19O3PS2/c1-4-9-12(13,10-5-2)11-7-8-14-6-3/h4-8H2,1-3H3

Upstream product

• 51580-01-9 phosphorous acid diethyl ester 2-ethylsulfanyl-ethyl ester 
• 110-77-0 2-(ethylsulfanyl)ethanol 
• 2524-04-1 diethyl phosphorochloridothioate 
• 56-38-2 parathion 
• 122-52-1 triethyl phosphite 

Downstream Products

• 126-75-0 Demeton-S 
• 5286-73-7 thiophosphoric acid O-(2-ethanesulfinyl-ethyl) ester O',O''-diethyl ester 
• 4891-54-7 thiophosphoric acid O-(2-ethanesulfonyl-ethyl ester)-O',O''-diethyl ester 

Relevant articles and documents

Selective Sulfur Oxygenation in Phosphoroamidate, Thionophosphate, and Thiophosphate Agrochemicals by Perfluoro-cis-2,3-dialkyloxaziridine

Several organophsophorus agrochemicals 2a-g with thioether, phosphoramidic, phosphorothioic, and phosphorothionic functions were reacted with perfluoro-cis-2-n-butyl-3-n-propyloxaziridine 1.The selective oxygenation of sulfide function to give sulfoxide derivatives 3a-g occured in high yields without overoxidation to sulfone products.Sulfoxides 3a-e were further oxidized under mild conditions to the corresponding sulfones 4a-e.All the products are themselves of interest as analytical environmental standards and their preparation is described in detail.

Pesticide compositions

Toxicant, especially pesticide compositions, having lowered dermal toxicity are provided. The compositions include a microencapsulated lipophilicpesticide, a hydrophilic surfactant and water. Methods for reducing the dermal toxicity of microencapsulated lipophilic toxicants, especially pesticides are provided. Methods for controlling insect pests using the disclosed compositions are provided.

Alkyl 4-[o-(substituted methyleneamino)phenyl]-3-thioallophanates

Various alkyl 4-[o-(substituted methyleneamino)phenyl] 3-thioallophanates are useful as fungicides and mite ovicides. The compounds are prepared by reacting alkyl 4-(o-aminophenyl)-3-thioallophanates with aldehydes or trialkyl orthoformates. Some of the compounds are prepared by further reacting the reaction product of an alkyl 4-(o-aminophenyl)-3-thioallophanate and a trialkyl orthoformate with a primary or secondary amine. Exemplary species are methyl 4-[o-(o-fluorobenzylideneamino)phenyl]-3-thioallophanate, methyl 4-[o-(4-methylbenzylideneamino)phenyl]-3-thioallophanate and methyl 4-[o-(2-furfurylideneamino)phenyl]-3-thioallophanate.