| Identification | Back Directory | [Name]
DEMETON-S-METHYL | [CAS]
919-86-8 | [Synonyms]
DSM
MSI(R)
MIFATOX
Persyst
Duratox
Demetox
demethon
Quad DSM
METAPHOR
bay18436
ai3-24963
BAY 18436
Power DSM
dep836349
Bay 25/154
Azotoz 580
bayer18436
DURATOX(R)
usp2571989
Vassgro DSM
bayer25/154
metasystoxi
metasystoxj
Metasystox I
Metasystox J
metasystox55
BAYER 25/154
metasystox(i)
Metasystox 55
Isometasystox
Metaisoseptox
metaisosystox
meta-Isosystox
Methyl demeton
Methyldemetone
ThioMeton Oxon
Demeton-S-meth
metasystoxforte
Isomethylsystox
methylisosystox
DEMETON-S-METHYL
METHYL-S-DEMETON
S-Methyl demeton
Demeton-S-metile
Methyl isosystox
Methyl demeton-S
Metasystox forte
Demetone-S-methyl
METASYSTOX I (TM)
demethonmethyl(ii)
Methylthionodemeton
DeMeton-S-Methyl-sul
METHYLMERCAPTOFOSTIOL
methyl demeton (jmaf)
METHYLDIMETONTHIOESTER
methyldemetonthioester
Methyl demeton thioester
Demeton-S-methyl sulfide
METASYSTOX I, 50MG, NEAT
DEMETONS-S-METHYLSULPHIDE
methyl-mercaptofosteolery
Methyl-mercaptofos teolery
Demeton-S-methyl solution
demeton-s-methyl (bsi,iso)
METHYL DEMETON (THIOL TYPE)
methylmercaptofostiol(ussr)
methyl-mercaptofosteolovy(ussr)
DEMETON-S-METHYL PESTANAL 50 MG
Demeton-S-methyl Solution, 100ppm
Metasystox I (TM) 50mg [919-86-8]
dimethyls-(2-eththioethyl)thiophosphate
Dimethyl S-(2-eththioethyl)thiophosphate
2-ethylthioethyldimethylphosphorothioate
S-2-ethylthioethyl dimethyl phosphorothioate
0,0-DIMETHYLS-ETHYLMERCAPTOETHYLTHIOPHOSPHATE
o,o-dimethyls-ethylmercaptoethylthiophosphate
O,O-Dimetil-S-(2-etiltio-etil)-monotiofosfato
o,o-dimethyls-(2-eththioethyl)phosphorothioate
O,O-DIMETHYL-S-ETHYLTHIOETHYLPHOSPHOROTHIOLATE
O,O-Dimethyl-S-(3-thia-pentyl)-monothiophosphat
O,O-Dimethyl S-ethylmercaptoethyl thiophosphate
O,O-Dimethyl S-(2-eththioethyl)phosphorothioate
s-(2-(ethylthio)ethyl)dimethylphosphorothiolate
s-(2-(ethylthio)ethyl)o,o-dimethylthiophosphate
S-[2-(Ethylthio)ethyl] O,O-dimethyl thiophosphate
S-(2-(Ethylthio)ethyl) dimethyl phosphorothiolate
O,O-Dimethyl S-2-(ethylthio)ethyl phosphorothioate
o,o-dimethyls-(2-(ethylthio)ethyl)phosphorothioate
O,O-Dimethyl-S-(2-ethylthio-ethyl)-monothiofosfaat
S-[2-(Ethylthio)ethyl] O,O-dimethyl phophorothioate
O,O-DIMETHYL S-[2-(ETHYLTHIO)ETHYL] PHOSPHROTHIOATE
1-dimethoxyphosphorylsulfanyl-2-ethylsulfanylethane
1-dimethoxyphosphorylsulfanyl-2-ethylsulfanyl-ethane
S-[2-(ETHYLTHIO)ETHYL]-O,O-DIMETHYL-PHOSPHOROTHIOATE
thiophosphatedeo,o-dimethyleetdes-2-ethylthio-ethyle
S-[2-(Ethylsulfanyl)ethyl] o,o-dimethyl thiophosphate
O,O-Dimethyl-S-(2-aethylthio-aethyl)-monothiophosphat
[[2-(ethylthio)ethylthio]-methoxy-phosphoryl]oxymethane
Phosphorothioic acid O,O-dimethyl S-[2-(ethylthio)ethyl]
Thiophosphate de O,O-dimethyle et de S-2-ethylthio-ethyle
o,o-dimethyl2-ethylmercaptoethylthiophosphate,thioloisomer
Thiophosphoric acid S-(2-ethylthioethyl)O,O-dimethyl ester
phosphorothioicacid,o,o-dimethyls-(2-(ethylthio)ethyl)ester
phosphorothioicacid,s-(2-(ethylthio)ethyl)o,o-dimethylester
phosphorothioicacid,s-[2-(ethylthio)ethyl]o,o-dimethylester
thiophosphatedeo,o-dimethyleetdes-2-ethylthio-ethyle(french)
O,O-Dimethyl 2-ethylmercaptoethyl thiophosphate, thiolo isomer
Phosphorothioic acid, O,O-dimethyl S-(2-(ethylthio)ethyl) ester
Phosphorothioic acid, S-[2-(ethylthio)ethyl] O,O-dimethyl ester
ethanethiol,2-(ethylthio)-,s-esterwitho,o-dimethylphosphorothioate
demeton-S-methyl (ISO) S-2-ethylthioethyl dimethyl phosphorothioate
Methyldemetone, S-(2-Ethylthioethyl) O,O-dimethyl phosphorothioate
S-[2-(Ethylthio)ethyl] O,O-dimethyl phosphorothioate, Methyldemetone
Ethanethiol, 2-(ethylthio)-, S-ester with O,O-dimethyl phosphorothioate
Demeton-S-methyl, Methyldemetone, S-(2-Ethylthioethyl) O,O-dimethyl phosphorothioate | [EINECS(EC#)]
213-052-6 | [Molecular Formula]
C6H15O3PS2 | [MDL Number]
MFCD00055464 | [MOL File]
919-86-8.mol | [Molecular Weight]
230.29 |
| Chemical Properties | Back Directory | [Description]
Demeton-S-methyl is pale yellow in colour and oily and has a sulphur-like odour. It is
sparingly soluble in water but 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 classified as Category I. It is used for the control of
insects, aphids, sawflies, and spider mites on cereals, fruits, vegetables, and ornamental
plants. On heating, demeton-S-methyl undergoes decomposition and emits very toxic
fumes, phosphorus oxides, and sulphur oxides. | [Appearance]
Demeton-methyl is a colorless to pale yellow
oily liquid. Unpleasant odor. It is a mixture of Demeton-S
and Demeton-O and may be formulated in a flammable
organic solvent that may alter the physical properties
shown here. | [Melting point ]
<25℃ | [Boiling point ]
118℃ | [density ]
1.207 g/cm3 | [vapor pressure ]
4 x 10-2 Pa (20 °C) | [refractive index ]
1.511 (589.3 nm 20℃) | [Fp ]
2 °C | [storage temp. ]
-18°C
| [Water Solubility ]
22,000 mg-1 (20 °C) | [Merck ]
13,6077 | [EPA Substance Registry System]
Demeton-S-methyl (919-86-8) |
| Hazard Information | Back Directory | [Chemical Properties]
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 undergoes decomposition and emits very toxic
fumes, phosphorus oxides, and sulfur oxides. | [General Description]
Pale yellow oil. Used as an insecticide. Not registered as a pesticide in the U.S. | [Reactivity Profile]
Organophosphates, such as DEMETON-S-METHYL, 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. | [Health Hazard]
DEMETON-S-METHYL inhibits the nervous system and is absorbed readily through the skin. DEMETON-S-METHYL is a liquid organophosphorus insecticide. Poisonous; may be fatal if inhaled, swallowed or absorbed through skin. Contact may cause burns to skin and eyes. | [Fire Hazard]
When heated to decomposition, DEMETON-S-METHYL emits very toxic fumes of oxides of phosphorus and sulfur. DEMETON-S-METHYL is a liquid organophosphorus insecticide. DEMETON-S-METHYL may burn but does not ignite readily. Container may explode in heat of fire. Fire may produce irritating or poisonous gases. Runoff from fire control water may give off poisonous gases. Hydrolyzed by alkali. | [Health Hazard]
Demeton-S-methyl is highly toxic to animals and humans. Careless occupational exposures
to demeton-S-methyl cause severe symptoms of poisoning that include, but are not limited
to, headaches, nausea, vomiting, diarrhea, sweating, dizziness, tremors, lack of coordination,
hiccough, and memory loss. Prolonged exposures to high concentrations cause pupillary
constriction, blurred vision, muscle cramp, excessive salivation, weakness, sweating,
abdominal cramps, unconsciousness, respiratory distress, convulsions, respiratory failure,
and death. | [Potential Exposure]
An organophosphate insecticide.
Those engaged in the manufacture, formulation and appli-
cation of the insecticide and acaricide on agricultural and
horticultural crops. | [First aid]
Move victim to fresh air. Call 911 or emergency
medical service. Give artificial respiration if victim is not
breathing. Do not use mouth-to-mouth method if victim
ingested or inhaled the substance; give artificial respiration
with the aid of a pocket mask equipped with a one-way valve
or other proper respiratory medical device. Administer oxy-
gen if breathing is difficult. Remove and isolate contami-
nated clothing and shoes. In case of contact with substance,
immediately flush skin or eyes with running water for at
least 20 minutes. For minor skin contact, avoid spreading
material on unaffected skin. Keep victim warm and quiet.
Effects of exposure (inhalation, ingestion, or skin contact) to
substance may be delayed. Ensure that medical personnel are
aware of the material(s) involved and take precautions to
protect themselves. Medical observation is recommended for
24 to 48 hours after breathing overexposure, as pulmonary
edema may be delayed. As first aid for pulmonary edema, a
doctor or authorized paramedic may consider administering
a drug or other inhalation therapy | [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. | [Incompatibilities]
ncompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or
explosions. Keep away from alkaline materials, strong
bases, strong acids, oxoacids, and epoxides. Strong oxidi-
zers may cause release of toxic phosphorus oxides.
Organophosphates, in the presence of strong reducing
agents such as hydrides, may form highly toxic and
flammable phosphine gas. Keep away from alkaline
materials. | [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. | [Uses]
Colinesterase inhibitor. Used as insecticide. | [Uses]
Demeton-S-methyl is a systemic insecticide used to control
sucking insects and mites in a wide range of crops and ornamentals. | [Uses]
Insecticide. | [Definition]
ChEBI: Demeton-S-methyl is an organic thiophosphate and an organothiophosphate insecticide. It has a role as an acaricide, an agrochemical and an EC 3.1.1.7 (acetylcholinesterase) inhibitor. It is functionally related to a 2-(ethylsulfanyl)ethanethiol. | [Metabolic pathway]
The initial step for the biotransformation and photolytic activation of
demeton-S-methyl is by thiooxidation to oxydemeton-methyl; consequently
the metabolism of the two insecticides is very similar and
metabolic routes determined for oxydemeton-methyl should be taken as
applicable to the behaviour of demeton-S-methyl in the same system.
Most studies on the biotransformations of these compounds have used
oxydemeton-methyl. | [Degradation]
Demeton-S-methyl was hydrolysed rapidly in alkaline media and more
slowly in acidic and neutral media. The half-lives at pH values 4,7 and 9
were 63,56 and 8 days, respectively. It is oxidised to oxydemeton-methyl
(2) (PM). |
| Safety Data | Back Directory | [Hazard Codes ]
T,N,Xn,F | [Risk Statements ]
24/25-51/53-36-20/21/22-11 | [Safety Statements ]
28-36/37-45-61-26-16 | [RIDADR ]
3018 | [WGK Germany ]
2 | [RTECS ]
TG1750000 | [HazardClass ]
6.1(a) | [PackingGroup ]
II | [HS Code ]
29309090 | [storage]
Demeton-S-methyl should be kept stored separately and away from food and feedstuffs.
Keep in a well-ventilated room. | [Precautions]
During handling and use of demeton-S-methyl, occupational workers should use a face
shield or eye protection in combination with breathing protection, protective gloves, and
protective clothing. During use and handling of the chemical substance, workers should
not eat, drink, or smoke during work and wash hands before eating. Workers should
prevent generation of chemical mists and observe strict hygiene. | [Safety Profile]
Poison by ingestion,
inhalation, sh contact, intraperitoneal, and
intravenous routes. Mutation data reported.
An insecticide. When heated to
decomposition it emits very toxic fumes of
POx and SOx. See also DEMETON-0 +
DEMETON-S and other demeton entries. | [Hazardous Substances Data]
919-86-8(Hazardous Substances Data) | [Toxicity]
LD50 in rats (mg/kg): 40 orally, 85 dermally (Edson) |
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